Thread: Diesel in a gasoline engine

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Really deepnhock?? My ol buick has problems with vapor lock, and boiling the gas in the carb. I am putting a heat sheild between the carb and the intake and adding some delron for insulation.

Originally Posted by Matt167

the tractors that can use both probably have very low compression gasoline engines probably 7:1 or lower, which I think only needs like 60 or 70 somthing octane to run correctly, diesel probably has that kind of octane.

The thing about a Diesel engine is how it ignites the fuel. Diesel fuel requires a higher compression ratio then the typical gaser. A 350 Olds Diesel has a 22.5:1 compression ratio!!. The reason, to heat the air that is drawn in on the intake stroke to a high temperature so that when the Diesel is injected into the combustion chamber it ignites. This is why intercooling is really needed on a turbo deisel because the cylinder temperatures can get way to hot and cause a melt down.

Those Tractors your talking about had compression release on them so they could lower the compression to run gasoline. There have been a few around where I'm from in Saskatchewan because of the cold winters. But whatever you do never put gasoline in a Diesel thats designed just for Diesel. The thing WILL explode, literally. A Diesel uses the cetane rating instead of octane rating. Cetane rating is the time the fuel takes to ignite once injected. The higher the cetane number the quicker the fuel ignites. So thats some things to think about Diesel.

We also have a couple old combines with the old Chrysler 318 Polyhemi engines that we run kerosene through them before we park 'em for the winter. We just choke them out and a big cloud of white smoke rolls out of the stacks and there oiled up for the winter (no fuel stabilizer required).

Sorry about the length of that last post. But I had to get that info about Diesel out there. I just figured that since its a hot rod forum that we might be in uncharted waters when talking about diesel. I think a diesel would make a sweet hotrod if you could get the turbo, electronic injected, versions with the power chip..somewhere in the 1000lb-ft of torque at 3200-4000rpm yeah thats what I thought. Anyways I found this link that might be interesting:

http://www.prime-mover.org/Engines/G...es/octane.html

hey crude nice to have another stubble jumper on the site.
i entertained a big diesel for a t bucket when i started to build mine but decided the frame and susp would would have to be too heavy to hold it up.
i was looking at a 3208 v8 cat cause i know this type of motor and it is a high rpm diesel, would be neat to have 2 big dual rear pipes big puff of black and your gone !!!