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Hercules 4cyl diesel... who knows about it?

2K views 6 replies 5 participants last post by  Captain Obvious 
#1 ·
There is a Hercules 4 cylinder diesel available here locally. Im curious if anybody knows much about them. My guess is that parts are hard to find. Im not a diesel guy but seems like a cool motor with 727. Seems like it would be underpowered for a truck but what about an rc? Just curious what you guys know.
 
#2 ·
I believe there are several different sizes.  Do you know which one it is?  Most I've seen where on generator's, marine applications, equipment, etc and very low HP.
 
#6 ·
I'm not familiar with that engine.  Is a 3.7 around 220 cubic inches?  How much horse power does it have?

It would probably pull an RC down the road, but it would probably be a SLOW ride!!!  I believe the international scouts had a small factory diesel available back in the 70's.  I know a guy who drove one about 25 years ago.  He said it was painfully  slow.  Having a vehicle that was slow by 1980's standards would be even worse today!

Now that little diesel may make sense to swap it into a smaller vehicle.  It would need to be light weight though.  Of course, it it is strong enough to take some boost.....you could install it in a heavier vehicle.
 
#7 ·
If it has a turbo it could be worth it. Similar power to a 318 or cummins 4.

If it doesnt have a turbo, probably not worth it. Turbo is only a benefit if it can blow dirty smoke at wot. Smoke is the rich lean indicator with "perfect" being a slight haze.

If it blows clean without a turbo, the extra air does nothing but blow out the exhaust. Would have to add more fuel, which is usually done with a different injection pump and injectors. Unfortunately not only can this get expensive, but maybe unavailable for obscure engines.

A lot of people try to use throttled gasoline knowledge in a throttleless timed injected engine. More fuel-more power UNTIL you hit the black smoke limit and have no more excess oxygen left to consume fuel.
 
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