Author Topic: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????  (Read 3470 times)

0 Members and 1 Guest are viewing this topic.

Offline Orangeforce

  • Newbie
  • *
  • Posts: 53
  • Gender: Male
Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« on: April 24, 2011, 09:12:54 PM »
Hey Guys...Just got to thinking.....Installed the Edelbrock "Combo" on a 1987 Dodge W150 4x4......Had a 2brl... (318 Motor)..... Everything went on with no problem........But just go to thinking.......The old 2 barrel actually had an electronic plug I unhooked when I took it off. I am starting to think that was for the Electronic Timing Advance? Because no vacuum advance on this 87....... Trucks idles & runs decent.....But you don't have that "PULL" you would expect from the carb/manifold combo? I'm starting to think this is my problem....That plug went into the old Carb to advance the timing? So would an easy fix be swap out to a Vacuum Advanced Distributor & run the vacuum line to the new Carb???
1981 Dodge Crew Cab thats now a 4x4. 10 inches of lift sitting on 38 inch Pirelli Jones Dirt Grippers. 1992 Front grill, Dodge Viper Red. Pics at http://s658.photobucket.com/albums/uu301/Orangeforce/

Offline cjohhny

  • Mopar Nut
  • ******
  • Posts: 6454
  • Gender: Male
  • RamchargerCentral.Com Rules!
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #1 on: April 24, 2011, 11:35:09 PM »
Not sure off the top of my head what the plug you speak of could have been for, but your 87 318 should have a 'lean burn' ecu on it (located just behind the battery inside the driver's side inner fender).  That controls the advance timing. 
What you need since you've put the 4bbl on, is to finish getting rid of the spark control (lean burn) ecu by swapping in a vacuum advance distributor and changing your ignition over to a stock (non lean burn) ignition module, a GM HEi conversion, or other aftermarket ignition setup.  If you look the in FAQ section, you'll find info on how to get rid of the lean burn setup.
1982 W350 Club Cab NP435 4x4 - just an old work truck, great for hauling and towing stuff.
1982 d150 Stepside /6 4 speed manual, baby-shit brown.

Offline chrysler300le

  • MO Chapter Leader
  • Mopar Nut
  • ******
  • Posts: 5506
  • Gender: Male
  • RamchargerCentral.Com Rules!
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #2 on: April 25, 2011, 10:13:19 PM »
My dad has a 87 W150 that had a 318.  I converted it to regular electronic ignition and it has a 360 4bbl now.  Anyway the electric plug is most likely Idle solenoid that kicks idle up a bit when A/C is on.  See if you have a small solenoid on the throttle linkage side.  Most 318's had something like this through the years.  Most likely your truck does not have a computer controlled carb.  If there is not an O2 sensor on drivers side exhaust manifold then computer only controls ignition advance and that is it.  Your best bet would be to convert to electronic ignition at this point and use vacuum advance for fuel savings.
2005 Dodge Neon SXT
2003 Dodge 2500
1981 Dodge Mirada
1979 Chrysler 300
1977 Dodge M885
1976 Dodge M884

Offline 85 Royal SE Prospector

  • Sr. Member
  • *****
  • Posts: 4904
  • Gender: Male
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #3 on: April 26, 2011, 12:17:33 PM »
You could actually run a 318 4 barrel carb/distributor/computer on it if you didn't want to complicate your setup, but that limits carb selection to 22 year old and older carbs, so it is not exactly always best. If your truck doesn't have the vacuum advance distributor setup it isn't that hard to convert and you will have lots of carb choices like what you already have on there.
1985 Dodge Royal SE Prospector Ramcharger 318 4x4

Offline minnesota guy

  • Newbie
  • *
  • Posts: 154
  • Gender: Male
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #4 on: April 27, 2011, 09:32:27 AM »
That Lean Burn was absolute junk!  Easiest conversion is over to factory vacuum advance distributor.  The Mopar engine manual has the conversion in it as well.  Most widely used distributor was the 318/360 type...Even your parts store should have a "rebuilt" model for around 40-50.00..Or your local junkyard should have plenty of them for cheap. 

FYI -in 1987 The 360 4bbl W150 used a dual pickup distributor.  They still had vacuum advance however.  Still more convuluted than normal vacuum advance distributor.  All in the name of emissions and the Pre global warming crowd. 

While you are there, toss in a newer profile cam if you are running the factory piece.  Like a small Comp Cams Extreme Energy cam and lifters.  That will wake it up.  Just not too big or you need to change the valve springs.    There was a guy on Ebay last year selling some of those that just had "Dyno time"  and basically new.  Selling some of them for 40.00.  I bought one and put it in my 440 for my 87 W150.  He might still be there.  Seems he gets the Comp test cams.

Offline KThaxton

  • The Criticizer
  • Global Moderator
  • RCC Addict
  • *****
  • Posts: 26581
  • Gender: Male
  • Have leafs, wheel travel.
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #5 on: April 27, 2011, 09:59:27 AM »
FYI -in 1987 The 360 4bbl W150 used a dual pickup distributor.  They still had vacuum advance however.  Still more convuluted than normal vacuum advance distributor.  All in the name of emissions and the Pre global warming crowd. 


The mid to late 80's dual pickup distributors on 360 4bbl's are really identical to a single pickup distributor, just has one more pickup in it, really not convoluted, just a PITA if the bushings are worn. Also, dual pickup had nothing to do with emissions, it just allowed less timing for easier starts, with slightly more advance for running. Pretty much a waste though.
STOP PLATE TECTONICS!

You're absolutely correct, Kendall. My mistake  ;D

Offline minnesota guy

  • Newbie
  • *
  • Posts: 154
  • Gender: Male
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #6 on: April 30, 2011, 08:40:53 PM »
I had one and it was convuluted.  One  more pickup with a chance to burn out, and I had to modify things when switching to a single pickup.  Convulted.  Yes.  It was emissions related to help passing the tests along with the air pump. 

You have it reversed with the distributor function.  They had a shorter slot to limit the total advance.  This alone stopped total timing at around 36 degrees when setting idle at 10-14 degrees...Which was the same as single distributors.
Actually, there is less total advance with this distributor than a single pick up. Plus with shorter advance slot, the springs didnt bounce as much, to assit with emissions and efficiency.  This is like my 440 race car set up.  You can run more advance at idle _more efficient for emissions, and then with the shorter slot, this limits total timing for which Mopars do not need.  Same with a 440.  they like a lot of initial advance, but not so much total advance.  The timing gun also showed great smoothness when revving up the motor with the limited slot advance. 

Just about everything Mopar did after 1969 with carburetion and ignition was to pass Federal emissions law. 

Offline KThaxton

  • The Criticizer
  • Global Moderator
  • RCC Addict
  • *****
  • Posts: 26581
  • Gender: Male
  • Have leafs, wheel travel.
Re: Edelbrock 4 Barrel Carb. & Intake on a 1987 W150????
« Reply #7 on: April 30, 2011, 10:16:01 PM »
I had one and it was convuluted.  One  more pickup with a chance to burn out, and I had to modify things when switching to a single pickup.  Convulted.  Yes. 

Switching to single pickup is easy, just unplug the 2 pin connector from the start/run relay then either remove, or move the start pickup out of the way. However, if I were to do it, I'd just remove the relay and splice the run coil to the ECU.

Quote
It was emissions related to help passing the tests along with the air pump. 

Not true, see the attachment below.


Quote
You have it reversed with the distributor function.  They had a shorter slot to limit the total advance.  This alone stopped total timing at around 36 degrees when setting idle at 10-14 degrees...Which was the same as single distributors.
Actually, there is less total advance with this distributor than a single pick up. Plus with shorter advance slot, the springs didnt bounce as much, to assit with emissions and efficiency.  This is like my 440 race car set up.  You can run more advance at idle _more efficient for emissions, and then with the shorter slot, this limits total timing for which Mopars do not need.  Same with a 440.  they like a lot of initial advance, but not so much total advance.  The timing gun also showed great smoothness when revving up the motor with the limited slot advance. 


No, I don't have it wrong. It's really simple, the two pickups are just mounted apporxiamately 180 apart and the start pickup is mounted to be slightly retarded compared to the run pickup. Again, this allowed more advance in the run position, without causing hard starts. Dual pickups had nothing to do with timing advance, if some of those distributors allowed for different amounts of timing, it wasn't because of the dual pickups, as their function is ONLY for the purpose I stated as well as the picture from my FSM.
STOP PLATE TECTONICS!

You're absolutely correct, Kendall. My mistake  ;D

 

email