Author Topic: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal  (Read 3907 times)

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Offline rustyorange78

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I am a long time lurker on the boards, posting my project now for 2 reasons.

1. Motivation to stick with it and get it "done".
2. Documentation of a few OBD2 magnum swap details that I didn't find elsewhere, especially as relates to Colorado emissions laws.   

Bought my pickup in 2007, it was a $700 Craigslist buy.  I grew up on a farm and beater pickups are in my blood.
78 W150 Adventurer, 360/727/np203.   Everything worked, even the AC (a little), and the rust wasn't fatal.       





Some Craigslist jeep takeoffs and some wheel paint and it was ready to work.


I used and abused it for a few years as my backup vehicle and landscape material hauler and then I decided I would try and learn to do body work.   Amazingly I found a dodge bed with no rust at upullandpay and after buying a cordless sawzall, I started.

































And then I got bored with body work and nothing got done (including the drivers side) until I built my new garage last year.   The tired old 360 hung on until the garage was built, but just barely.  I need a pickup to get all the cool things I need for my new garage so at that point I foolishly decided to do an efi magnum swap.    That will be coming next in part 2.     Part 3 will hopefully be me finishing the body, paint and interior.


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    Offline rustyorange78

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    OBD2 Magnum swap -- Colorado emissions legal
    « Reply #1 on: October 8, 2019, 01:50:14 am »
    Colorado front range emissions with an OBD2 swap. 

    First off, this is doable.  It's not really hard and if I was to do another one, it would be pretty easy, but it's kind of a pain.  And yes, it would have been much much easier and cheaper to have put a carb on it and have been done.  I knew this before, and I really know it now.  I didn't do that because I wanted to do a full obd2 swap, for fun and to end up with modern fuel injection engine with diagnostics and the potential for tuning.   It was fun and it runs great.   

    While not quite as draconian as California (you don't have to do the transmission as well), for anything newer than 1976, if you do an engine swap, you essentially need to swap the whole engine package even with classic plates.  This ends up being mostly for visual inspection and they ended up specifying a standing idle and 2500 RPM test.  I am not 100% sure of the ranges they used, but the numbers looked like 1998 numbers, not 1978 numbers.   

    In order to even get the test done, you need a document signed by someone in one of the technical offices that essentially says what they should test for and how, in lieu of testing for standard 1978 equipment and limits.   

    Since I swapped from a 1998, it says I need a three way cat, both 02 sensors and a functioning evap system (not the full system with vacuum test sensors, just the canister and solenoid as was standard in 1998), a functioning check engine light, a functioning obd2 port and no stored emissions related codes.     

    Essentially it needs to look like a 1998 and behave like a 1998, but no rolling road dyno test required since not required for a 1978 car.    If you swap into a 1982 or newer, it would have to pass the dyno test.   

    So, what to take from this?   OBD1 would be a little easier, but the only real advantage would be that you could have some codes stored and nobody would know and the check engine light would be easier since it doesn't come through the ccd bus.   I have read that 96 and 97 Rams had a discreet CEL/MIL signal from the PCM that didn't go through the ccd bus, but I didn't check as I got it to work.

    Also, the technical guy was a good guy to work with he seemed knowledgeable and it seemed like there might be some leeway to cut you some slack, but I didn't need any in the end.  Frankly, if I had said it was a 1993 motor and hadn't exposed the obd2 port and had rigged up a check engine light to come on and go off at start, I'm pretty sure it would have been fine so long as all the visible inspection and idle test passed.   I can't say for sure, but I'm pretty sure he didn't run the number on the side of the pcm and check what year it came from.   

    If you make it look like a 93, you could probably get away with claiming it was a 93 and use the newer computer.   You would still need a cat and evap system, and whatever else was stock in 93, so in the end, not much savings for having to try and get away with something.

    Mostly finished engine compartment pic.   I'll get a newer one later.







     
    « Last Edit: October 10, 2019, 01:31:01 pm by rustyorange78 »

    Offline rustyorange78

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    OBD2 Magnum swap -- What I learned that I didn't find documented elsewhere.
    « Reply #2 on: October 8, 2019, 03:09:01 am »
    1. Speed sensor.   

    It's necessary to have a speed sensor hooked up to the VSS input on the C2 PCM connector.    This pin has an internal pullup resistor.    The VSS signal should be 8K pulses per mile and it should be a digital signal.   This pin as far as I know does not have any sort of input conditioner for a VR sensor.     In stock form this signal comes from the ABS computer and is based on the rear wheel speed sensor.   

    The rear wheel speed sensor is a VR sensor and the tone ring has something like 104 teeth.   I counted a picture on the internet, so this is only that accurate.   If you do the math this comes out to about 80K pulses per mile on a 30 inch tire and would need to be fed to the ABS computer or something like the Dakota Digital SGI-5E in order to get an 8K ppm digital signal out.    If you do a full swap of the entire drivetrain, grab the ABS computer.    If you aren't swapping a rear axle with a speed sensor, don't bother.   You aren't going to easily find an off the shelf 80K ppm sensor anywhere to drive the input.   

    Standard Motor SC108 -- 1991-1993 Dodge Dakota speed sensor.
    This speed sensor is often mentioned for use in this application.


    What nobody ever mentions is that is it a Reed Switch sensor.    Not a hall sensor nor a VR sensor as you might imply from the two wires.   It's basically a little magnetic switch that switches between connecting the two inputs and open circuit 8 times per revolution.      What this means is that with the VSS pin on the PCM pulled high internally, all you need to do is run ground to one pin and the other to the VSS wire in the C2 connector and you will get an 8K ppm digital signal.  Speedometers are designed to turn 1000 times per mile.   If you buy the longer speedometer cable to fit a 4x4 Dakota, it's the right size with the right ends for your older 4x4.   You can also order the correct sealed plug from standard motor as well ---  S727  or grab one from a junk Dakota.

    Frankly, this works great and is cheap, but with a 98 Dakota 5.2 Manual PCM, I honestly noticed no difference in performance or drivability, but it removes the error code (necessary for emissions) and maybe helps with coast fuel cut.

    You could also use Dakota Digital SEN-01-4160 along with a VR signal conditioner of some sort like their SGI-5E or you could even fake it with a GPS speed signal driver GPS-50-2.  Note that the GPS speed sensor is going to cause a check engine light on the dyno since you aren't moving so probably not a good idea if you have to pass a dyno test.

    My harness came from a Durango, so it had wires going back to the transmission for the output shaft speed sensor.   Note that this sensor is non existent on a manual Dakota.  At connector C2 I cut t14 and t13, spliced one to ground and one to G7 to provide the VSS signal.   I then used the existing t13 and t14 to run to the new sensor. 


    There is a lot of crap coming out of the 203 now, but it all seems to work and doesn't seem stressed.

     
    2.  Check engine light.     The check engine light in a 98 and newer is built into the dash computer.   The PCM will tell it to light, but that is a digital signal over the CCD bus.  The CCD bus is proprietary and not well documented.  There are a few people out there building decoders and such that could eventually be turned into very complex check engine light.   https://chryslerccdsci.wordpress.com/order/ This guy from Hungary has the one that looked most promising to turn into a CEL, but I needed to finish this up and get driving so, I just installed an entire Durango dash.    It was cheaper and easier and removable as I'll only need it every 5 years.

    You just need the CCD bus wires from the PCM, battery power, switched power and ground.   You get a fully functioning dash at that point.   It seems like it would be possible to hide the circuit board in the dash and remotely drive the stepper motor gauges.   But again, I wanted to get driving so this is the result.  I'll remove it eventually, but for now, it's not actually in the way and I get a trip computer and tach out of the deal and can check the accuracy of my other gauges.



    Made from a 1970's stereo cabinet so it has authentic fake woodgrain veneer on the side.





    3. The frame crossmember that the tank fits into changed at the same time as the body style and tanks changed.   You can use a fuel tank from a 92 or 93 pickup, but you will have to change out the crossmember.  It's riveted in.  Dodge also made 11 or 12 different frame variations, so it will likely still have to be modified to fit your frame.   I thought this was going to be easy but it was a pain in the ass.    I now have a stock durango in tank pump, but this was not a one evening swap like I thought it was going to be.  I'll post pictures later.  EDIT-- Attached pictures now.  You can see the difference in the shape.   The early one is rounded and the later square.


    4.  A fat single exhaust with a cat is not going to fit on the passenger side with the passenger side front driveshaft.   Some vans had a driver side exit for the exhaust that is also 2 inch rather than 1 3/4 inch or whatever weird size most of them are.    The van downpipes are almost perfect, but in the end are too wide and have to be modified.   I'll post pics later as well.  EDIT -- Pics attached
    « Last Edit: October 10, 2019, 01:29:02 pm by rustyorange78 »

    Offline stftruck

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #3 on: October 8, 2019, 10:06:17 am »
    Very Nice Job!  I like the info you provided... 
    I'm surprised your truck is held to the newer engine emissions standard.  One would think the 1978 standard would be it & yours would pass with flying colors, being it was cleaner!  Oh well, every state has the hoops you need to jump through.
    Keep up with the highlights!
    Thanks

    Offline RCCADMAN

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #4 on: October 8, 2019, 11:25:13 am »
    What color paint did you use for the orange? Is that a random orange or a Dodge standard paint like the Sunstone? Mine came standard with Sunstone. It's faded so I don't know exactly what Sunstone looks like. lol

    Is there any special reason you went with a full magnum engine swap to get modern day fuel injection instead of going with a carb swap to EFI unit? ie: Holley Snyper. I'm just being curious, not critical.
    74 RC SE 4X4
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    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #5 on: October 8, 2019, 12:14:35 pm »
    What color paint did you use for the orange? Is that a random orange or a Dodge standard paint like the Sunstone? Mine came standard with Sunstone. It's faded so I don't know exactly what Sunstone looks like. lol

    Is there any special reason you went with a full magnum engine swap to get modern day fuel injection instead of going with a carb swap to EFI unit? ie: Holley Snyper. I'm just being curious, not critical.

    I'll look it up tonight, but the original orange is "sunsomething".   I think the same as yours.    When I was experimenting with paint I went with a "sunrise" orange that is much more red.   More like later Allis Chalmers orange or or the Sunrise orange used on Macho powerwagons which is what I was going for.    If you look at the 76 W100 project, the first picture of his old 400 pickup is the color I was going for.   The second pics of his newer pickup is what I think our orange should look like without 40 years of wear and tear on it.   The interior of mine is all orange so I can mostly tell what it should have looked like.   When and if it gets painted properly I am going with later Allis Chalmers orange as it's basically the color I want and you can always get a spray can to match.

    1. Full magnum swap was mostly for fun to see if I could do it.  I have several other similar oem engine management swaps that I want to complete and this was a test for me.     
    2. In the end I wanted a pickup I could jump in and turn the key and drive.  I see a lot of posts on the aftermarket systems of people messing with pumps and tuning and hard to get parts years later.  (this varies obviously)  Full magnum swap hopefully has near factory reliability and parts at every Napa.     
    3.  I'm not poor (anymore), but if you couldn't tell from the $700 pickup, I am a cheap bastard and the magnum stuff didn't cost anything but time.   :)   If somebody had handed me an magnum rpm manifold (can't use the Chinese ones because I want factory magnum AC) and a holley sniper or fast efi system (or even a brand new carb), I probably would have done it.

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #6 on: October 8, 2019, 12:28:21 pm »
    Very Nice Job!  I like the info you provided... 
    I'm surprised your truck is held to the newer engine emissions standard.  One would think the 1978 standard would be it & yours would pass with flying colors, being it was cleaner!  Oh well, every state has the hoops you need to jump through.
    Keep up with the highlights!
    Thanks

    Yeah, I sort of see the point if both vehicles were newer or the engines were dissimilar.  If I did a magnum swap into a geo metro, it would make more sense.   Since emissions are tested as a full system, I can see why they want the full system swapped.  The charcoal canister recovery for the fuel tank is an obvious one.  I put that on just so my garage wouldn't smell in the summer time.    That being said, it's silly requirement for a 1978 pickup.   It had no emissions equipment on it from the factory, except if you count the PCV valve maybe?   No cat, no egr, no anything.    There isn't much I could have done to a fuel injected magnum engine to make it dirtier than the stock 360 and even worn out, when I had it tuned up, it always passed with flying colors.   Passenger cars in 78 had to have cats, etc. so that is probably why we have the 1976 cutoff.     At the end of the day, I can't think that restricting 40 year old vehicles has any measurable effect on overall emissions output.   There simply aren't enough of them on the road to make any difference.   I highly doubt everyone would start driving old pickups around even if they didn't have to pass emissions tests.   

    Offline RCCADMAN

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #7 on: October 9, 2019, 07:45:23 am »
    I'll look it up tonight, but the original orange is "sunsomething".   I think the same as yours.   

    1. Full magnum swap was mostly for fun to see if I could do it. 

    "I'll look it up tonight, but the original orange is "sunsomething".   "

    Yes, that would have been the Sunstone. It was a more expensive optional paint due to the cost of the pigment. The truck pictured is one I found on the internet taken in '75 of a Sunstone paint on a '74. (This is exactly what mine looked like when it rolled off the line in '74.)

    "Full magnum swap was mostly for fun to see if I could do it."

    I get that. I wish I had more time to tinker. I'd have all kinds of fun projects to play with.
    74 RC SE 4X4
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    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #8 on: October 10, 2019, 02:01:00 am »
    Yes, that would have been the Sunstone.

    Hmm that looks like more of an earthtone orange.  I can't find my color tag, it's in a box somewhere, but looking up the tcpglobal color library I only see sunrise orange listed for 78 as a close match so I assume that is what it is.   I definitely want a redder, brighter orange when I paint it.
    « Last Edit: October 10, 2019, 02:20:13 am by rustyorange78 »

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #9 on: October 10, 2019, 12:43:01 pm »
    Photo size test.    It looks like about 700 wide is a big as you can attach and not pop a new window when clicked or have to scroll when linked.     1024 shows better details, but my welds look better at 700.

    1024 photobucket.


    700 photobucket


    « Last Edit: October 10, 2019, 01:17:42 pm by rustyorange78 »

    Offline RCCADMAN

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #10 on: October 10, 2019, 02:03:43 pm »
    Hmm that looks like more of an earthtone orange.  I can't find my color tag, it's in a box somewhere, but looking up the tcpglobal color library I only see sunrise orange listed for 78 as a close match so I assume that is what it is.   I definitely want a redder, brighter orange when I paint it.

    They probably didn't have the sunstone in 78. Mine has it in 74 but it's listed under the 75's.
    https://www.paintscratch.com/touch_up_paint/Dodge/1975-Dodge-Trucks-Sunstone-DT5207-1975.html
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    Offline rustyorange78

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    Re: 1978 W150 -- OBD2 Magnum swap -- details
    « Reply #11 on: October 10, 2019, 02:40:40 pm »
    Step one.   Find a friend with a low miles wrecked Durango.
    Step two.  Bribe said friend into helping you pull it.


    Step 3. Grab the full engine and body harness including the pdm.   Label and take a picture of anything you unplug.   Seriously, you will hate yourself later if you don't.


    Step 4.  get motor on stand and prepare to do a minor gasket freezeplug cleanup.


    Step 5. Mark your distributor. 


    Step 6. Pull valve covers and manifold. 
    Step 7. Realize this should have been step 2.


    Step 8.  Do a better inspection and see what parts are going to be needed for an overhaul.   Compression tested fine.   I ended up installing bearings, oil pump and I replaced the pushrods and two rocker arms as a couple showed some wear on the ends.  At that point I should have done a complete tear down and had the block tanked and honed, but I just cleaned everything as well as I could on the stand.





    Step 9 or so Prime.


    Step 10. Finished.






     


    Offline stftruck

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #12 on: October 10, 2019, 05:49:02 pm »
    How many miles are on that Durango engine?

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #13 on: October 10, 2019, 06:02:53 pm »
    < 140K.    Not really sure what happened.   I know it was maintained regularly. 

    I checked the PCV valve and it was definitely bad.  Stuck open.   Not sure if that would cause a problem with sludge like this or not.

    Offline stftruck

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #14 on: October 10, 2019, 10:56:42 pm »
    How was the gasket on the bottom of the intake manifold...that gasket under the steel cover fails all the time.

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #15 on: October 11, 2019, 11:55:12 am »
    The gasket looked good enough with no obvious leaks and no major oil sucked into the intake.   

    Putting it back together, I was tempted to buy a solid plate but it seems like there is a lot of different opinions on whether necessary or not with a good felpro gasket and verifying the bolts tighten properly.  This pickup is not going to get many miles on it.   4500 is the max for classic plates and I have never put more than 1 or 2 k on it in a year so if the gasket lasts 40K miles, I will get between 9 and 40 years out of it.  :)

    Offline stftruck

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #16 on: October 11, 2019, 10:00:19 pm »
    Good, as long as you were aware of the problem with the OEM gasket.  The OEM gasket might have even changed over the years to fix this issue, but not sure when or if that did happen.

    Offline rustyorange78

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    Re: 1978 W150 -- OBD2 Magnum swap -- Out with the old
    « Reply #17 on: October 18, 2019, 01:22:42 am »
    Out with the old.





    xfer case had a small leak.




    A couple of minor modifications required.
    Driver motor mount needed to be slightly wider.



    Clearance for the crank sensor.






    Offline rustyorange78

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    Re: 1978 W150 -- OBD2 Magnum swap -- Details
    « Reply #18 on: October 18, 2019, 02:09:27 am »
    New crossmember.



    New fuel line.






    Tank in with stock Durango fuel pump.   I had to trim the diameter to make it fit in the hole.


    Added the old fuel level sensor to the new pump so that my dash gauge will work.   I ended up extending the arm and it works well so far.


    Made the new throttle cable work with the old pedal.



    Wire loom surgery


    Lots of labels, mostly to help decide which wire I could remove or leave in the loom taped off in case they became useful.     



    I essentially stripped all the lights and interior control wires.

    The 98 Durango manual is available in a searchable PDF and for the most part is very good, but the main connector to the cab is not directly labeled, you have to find the wires at other connectors where they are labeled.  The complete Dakota manual is also available and has a couple of mistakes fixed, but unfortunately searching doesn't work as well.    I wrote these up as I went along.  This required several beers over several nights.





    Offline pc1p

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #19 on: October 24, 2019, 01:35:48 am »
    Good, as long as you were aware of the problem with the OEM gasket.  The OEM gasket might have even changed over the years to fix this issue, but not sure when or if that did happen.
    The cheapest and most reliable fix is to use smaller G8 bolts OR snip the end off of the factory bolts, alongside a fresh FelPro gasket and torqued to the proper specs.
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    Offline pc1p

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #20 on: October 24, 2019, 01:38:30 am »
    Nice work going on here, I love combining old and new :)

    If you have an Magnum questions, feel free to ask... I've had a heck of a time figuring out what you figured out, so that's why I tried to document them like you did.

    My W150 got a full Magnum swap but the RC already was factory equipped. That said, it's getting converted to an OBD-II setup like the W150 (for tunability) and am building a 408 for it.
    '93 RamCharger LE | 408 cid stroker | Built 46RH | Dana 60s | TrueTrac Rear | ORD Crossover Steering | 37" Milestars | 17x9" Method 101 Beadlocks

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    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #21 on: October 24, 2019, 12:13:21 pm »
    The cheapest and most reliable fix is to use smaller G8 bolts OR snip the end off of the factory bolts, alongside a fresh FelPro gasket and torqued to the proper specs.

    That is what I read and did.  Felpro gasket set for the rebuild and I can't remember at this point if I checked the length of the existing bolts and made sure they would go in all the way or ground them.   I think I just checked them and saw no issues.   Apparently there was some variation in the length used at some point. 

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #22 on: October 24, 2019, 12:45:55 pm »
    Nice work going on here, I love combining old and new :)

    If you have an Magnum questions, feel free to ask... I've had a heck of a time figuring out what you figured out, so that's why I tried to document them like you did.

    My W150 got a full Magnum swap but the RC already was factory equipped. That said, it's getting converted to an OBD-II setup like the W150 (for tunability) and am building a 408 for it.

    My swap is now running great and passed emissions so nothing much left to do.  Having done it once, I now kind of want to do it again and see how efficiently I could get it done on the second go around.   I'm jealous of your new project.   I was looking at a 55 Coronet which would have been an awesome swap candidate.....   Luckily or unluckily it sold before I could take on another project.     

    One thing I am still curious about (for future reference) is how you got an obd2 check engine light to work without a full extra dash :) .    I have read that the 96-97 ram computers had an explicit check engine light output, but never actually verified it.   Is that what you did?    Also, it looks like you used the non passthrough version of the speed sensor that I used (in the tailshaft or transfer case?) and ran that to the vss input.   If you go with the 46RE in the new project, I assume you will need to use that as the output shaft speed sensor and then have a separate vss input?    I'll ask this in your thread as well since it will make more sense there.

    Offline mopar65pa

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #23 on: October 28, 2019, 06:07:13 pm »
    Well Dang!  :o No way I would ever try doing that as I HATE wiring but you did a great job.  {cool}

    I have been told that the MAG 318's have as much HP and torq as an old stock 360.
    I'd rather push a DODGE than drive a chevy or a ford!!!!!!
    77 400/727 RC
    79 360/727 RC
    80 318/435 TD
    93 CTD W250 club cab
    73 Charger SE 400/727 
    02 883R HD
    01 Elecrta HD
    88 W250 5 speed plow truck
    2000 CTD 5 speed ext cab short bed Wife's truck
    2002 Durango work beater
    2000 Durango blown head gaskets
    Quote
    Ted Nugent called and he wants your shirt back! http://www.youtube.com/watch?v=HFduVeNE

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #24 on: October 28, 2019, 06:42:37 pm »
    Well Dang!  :o No way I would ever try doing that as I HATE wiring but you did a great job.  {cool}

    I have been told that the MAG 318's have as much HP and torq as an old stock 360.

    It's definitely way faster than the old worn out 360.  :)   
    Keeps up with modern traffic with no problem.

    Offline pc1p

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #25 on: October 29, 2019, 10:24:33 pm »
    One thing I am still curious about (for future reference) is how you got an obd2 check engine light to work without a full extra dash :) .    I have read that the 96-97 ram computers had an explicit check engine light output, but never actually verified it.   Is that what you did?    Also, it looks like you used the non passthrough version of the speed sensor that I used (in the tailshaft or transfer case?) and ran that to the vss input.   If you go with the 46RE in the new project, I assume you will need to use that as the output shaft speed sensor and then have a separate vss input?    I'll ask this in your thread as well since it will make more sense there.

    That is correct - the 96-98 (early in 98, the later are referred to as 98.5+) ECMs have a true MIL controller (as well as a Generator lamp controller). The VSS and shaft speed sensor are used in the 96-98 ECM's as well, while the VSS is also used. In the later models, the VSS goes away on the CCD ECMs. I've decided to stay with the 46RH, but found a lock up version. I decided that I didn't want to use a custom t-case shifter and because I may want to eventually build a 6.1/6.4 G3 Hemi so the 46RH would work better with that than the 46RE :)
    '93 RamCharger LE | 408 cid stroker | Built 46RH | Dana 60s | TrueTrac Rear | ORD Crossover Steering | 37" Milestars | 17x9" Method 101 Beadlocks

    Link: https://ramchargercentral.com/projects/pc1p's-1993-ramcharger-le-1ton-build/

    98 Jeep TJ | 4.0/AX15 | 4" RE Super Flex | D30 30-spline | D44 CM shafts | E-lockers | 5.13 | 35" KM3

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #26 on: October 30, 2019, 04:35:29 pm »
    Thanks, I was about to go down the path of looking at the wiring differences for a 97 Ram/98Durango, but decided to try and add the dash anyway and see if it would work. 

    Next swap gets the 96- early 98 computer.  :) 

    As far as I can tell, the 98-2000 durango/dakota takes the vss input from the ABS computer and has a 2 wire output shaft VR sensor that goes to the pcm on all auto trans models.   

    I reread your section on speed sensors, and it looks like you swapped to a 3 wire hall sensor from what I assume is the same 2 wire reed switch sensor like I used from the early Dakota's but a direct plug in version rather than a speedo cable passthrough.   

    If your old one was indeed the same 8 pulse per revolution reed switch, you probably could have used it rather than swapping to the later hall unit.   Hall sensor probably is a better deal in the long run.

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #27 on: January 6, 2020, 02:05:09 pm »
    Final swap modification.   TV cable lever extension. 

    I could not adjust the TV cable tight enough to get good shifts out of my 727 without restricting full throttle.    There is probably something internal that needs adjusting?  It was easy to create a slightly longer lever so that is what I did.   It now shifts well and I get full throttle opening.




       

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #28 on: January 6, 2020, 02:32:31 pm »
    Steering was a bit sloppy so I installed a rebuilt steering box (went with the later model to switch to the newer oring style lines) + ebay ujoint shaft.  Works well.  I was going to have the alignment done, but decided to make sure that the tierods and shaft were free and not rusted together.  They were not.   Threads were pretty much gone on the fine thread side, so new moog tierods and a new shaft were ordered.  Found the shaft as an amazon warehouse return for $50.    I just set the toe myself with two straightedges on the rotors and probably won't bother with an alignment as I don't think they can probably do any better.   

    Offline stftruck

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #29 on: January 7, 2020, 08:45:35 pm »
     {cool} {cool} {cool}

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #30 on: July 27, 2020, 03:22:39 pm »
    Updates:

    Rebuilt axles 9.25 and d44, but waiting to install until I decide if I am going to lift and get bigger tires to make the 3.90 gears work at highway speeds.   The 3.54/3.55 in there now is almost too low for interstate driving.

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #31 on: July 27, 2020, 03:30:39 pm »
    I wish whatever estate sale sold this for scrap would have contacted me first...

    But I did eventually get enough help to pull the bed and get it home along with a nice grill, totally rust free drivers door, straight front bumper and tailgate.

    You just don't find straight rust free beds for these pickups even in Colorado, the square fender opening trapped moisture and rotted.   Other than a couple door dings this bed is perfect.   Looks like it had been garaged and covered with a camper shell its whole life.

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #32 on: July 27, 2020, 03:54:54 pm »
    Knock on wood, but so far the Magnum swap has been 100% reliable.  I have done a 240 mile round trip in it and lots of trips around town picking up steel for welding projects, sand for a paving project, and Dodge parts for the dodge project etc.   Just getting in, turning the key and driving away is awesome.  No issues with heat even in traffic and 100 degree temps.   Fuel economy is probably 20% better than the 360 2 barrel, but still barely in the double digit range.

    Offline mopar65pa

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #33 on: July 28, 2020, 03:46:06 pm »
    Updates:

    Rebuilt axles 9.25 and d44, but waiting to install until I decide if I am going to lift and get bigger tires to make the 3.90 gears work at highway speeds.   The 3.54/3.55 in there now is almost too low for interstate driving.

    3:55's are a great gear for our trucks. If you are going with bigger tires they will be perfect.  Use this to help you figure what you need  https://ramchargercentral.com/index.php?action=calculators

    I'd rather push a DODGE than drive a chevy or a ford!!!!!!
    77 400/727 RC
    79 360/727 RC
    80 318/435 TD
    93 CTD W250 club cab
    73 Charger SE 400/727 
    02 883R HD
    01 Elecrta HD
    88 W250 5 speed plow truck
    2000 CTD 5 speed ext cab short bed Wife's truck
    2002 Durango work beater
    2000 Durango blown head gaskets
    Quote
    Ted Nugent called and he wants your shirt back! http://www.youtube.com/watch?v=HFduVeNE

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #34 on: July 29, 2020, 12:52:11 pm »
    Thanks for the link.  I'd done the calculation before but that is handy. 

    I am running 30s at the moment so I'd have to go to a 32-33 with the 3.90s to get back to roughly the same.

    My dilemma is that I don't really want much of a lift since I mostly use my pickup to haul stuff and drive around, but the original 8.25 and d44 with 3.55s are both pretty tired and I got the new axles along with a 4" rough country lift and those rims with the 35's in a bundle deal for cheap.     

    What I would like to do is a 2" skyjacker lift (or something similar with decent ride quality),  the rebuilt axles at the 390 ratio, 32" tires, and.... move from the 727 to an overdrive transmission, but I kind of like the np203 for winter driving, and I don't have any of the other stuff except the axles.

    I'll do something like that at some point, but likely not until after I finish the body and finally paint for real.   The new bed is going to accelerate that process considerably since it is mostly perfect to begin with.

    Offline mopar65pa

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #35 on: July 29, 2020, 04:20:50 pm »
    I'm with you on the NP203. I love the full time 4x4. No vac lines, no hubs to turn just run it until the snow is higher than a foot and loc it in.  ;D
    I'd rather push a DODGE than drive a chevy or a ford!!!!!!
    77 400/727 RC
    79 360/727 RC
    80 318/435 TD
    93 CTD W250 club cab
    73 Charger SE 400/727 
    02 883R HD
    01 Elecrta HD
    88 W250 5 speed plow truck
    2000 CTD 5 speed ext cab short bed Wife's truck
    2002 Durango work beater
    2000 Durango blown head gaskets
    Quote
    Ted Nugent called and he wants your shirt back! http://www.youtube.com/watch?v=HFduVeNE

    Offline rustyorange78

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    1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #36 on: September 16, 2020, 04:27:26 pm »
    Time to fix the floorboards.   

    Sent from my Pixel 3a using Tapatalk


    Offline rustyorange78

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    1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #37 on: September 18, 2020, 11:16:56 am »
    More

    Sent from my Pixel 3a using Tapatalk


    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #38 on: October 6, 2020, 04:13:23 pm »
    Found one more spot to deal with behind the drivers rear cab mount.   Will also need to replace the lower half of the mount.   Almost got the new vinyl floor installed before remembering that I was going to replace the mount bushings before I closed it up.

    Offline mopar65pa

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #39 on: October 7, 2020, 03:39:01 pm »
     {cool}
    I'd rather push a DODGE than drive a chevy or a ford!!!!!!
    77 400/727 RC
    79 360/727 RC
    80 318/435 TD
    93 CTD W250 club cab
    73 Charger SE 400/727 
    02 883R HD
    01 Elecrta HD
    88 W250 5 speed plow truck
    2000 CTD 5 speed ext cab short bed Wife's truck
    2002 Durango work beater
    2000 Durango blown head gaskets
    Quote
    Ted Nugent called and he wants your shirt back! http://www.youtube.com/watch?v=HFduVeNE

    Offline rustyorange78

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    1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #40 on: October 14, 2020, 12:08:53 pm »
    Anyone ever build a custom interior surround for the rear of an extended cab?   I haven't used the jump seats the entire time I've owned it and the original plastic is all brittle and cracking.

    The ACC rubber mat fit decently and I suspect it will flatten out a bit more in the heat over time.  Didn't seem to have a proper molding for the accelerator pedal.  I think the later models don't attach to the floor?  Pain to get all the holes lined up and drilled for everything.

    Added a 90s seat with the head rests.  Will get reupholstered appropriately at some point. 

    Need a nicer steering wheel.   

    Sent from my Pixel 3a using Tapatalk


    Offline Royal Se

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #41 on: October 15, 2020, 04:07:35 am »
    What a great job !  {cool} 
    Ramcharger 1979 Royal SE, 360ci, A727, NP203

    Offline Ragman

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #42 on: October 16, 2020, 09:43:45 am »
    New seat looks good. It looks like it came from another club cab with the split in the middle. My Club Cab seat is shot so I put in a bench from a regular cab. The club cab benches are narrower and offset to allow a passenger to get in the back on the pass side. The mounts are also different. I never could get the regular cab bench to fit right so I just pulled it and put my crappy original one in. Busted springs and all. Lol!
    1978 W150 Club Cab "Spare Change" D44/D60,360/435/205
    1963 Dodge Dart- Built 360/833 4-speed
    2006 Dodge Ram 2500 Quad Cab

    Offline rustyorange78

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    Re: 1978 W150 -- Now with OBD2 Magnum swap -- Colorado emissions legal
    « Reply #43 on: October 16, 2020, 12:22:19 pm »
    Yeah, its a proper club cab folding seat.    I had been looking for a solid one with the head rests for a while.   This one has a split right at the drivers side seam and a couple of wear holes in the vinyl on the back but is otherwise in really good shape.  Plan is to redo with a two tone gingham or houndstooth insert to match the original seats.

    It seems to sit higher and not go back as far as my old one.   I looked at the seat brackets and the slides and they appear to be identical and have the same range of movement.    I think I just got used to the compressed and missing foam on my old seat.