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ChadS
10-28-2005 10:19:08
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Re: Gasser Dieseling in reply to Lamont, 10-27-2005 14:35:38
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Lamont, Run a compression test. best way to help this situation is to know what your dealing with. is this the Case your working on? If the compression pressure is 200, 93 might run it, if it is over 200, or lets say 225-250, there is no way 93 will help pinging. on the IH's Ive messed with, they will diesil if the octane is below 93. thats at 210 psi. Thats why I use ethanol, it does take the guess work out of fuel. That fuel will ignite 300 psi and not detonate, the only fuel I know of that can do that is Methanol Alcohol in a gas engine. I belive Aviation fuel burns so hot in the cyl, that the cyl temp will actually make things worse, just from the temp. if you have tried to adjust the timing on a hot fuel and it does not help, you need to find a better fuel. maybe you have limited resources on what to use for fuels,, but if you can, try to find E85 and mix that with your 93 octane. Im sure that will run that engine and solve the problems you have. The reason I say that is it burns so much cooler, very hard to ignite the more potent the mix is. Im thinking you have a cyl temp problem and causing the run on. Even though it is 100+ octane, its not correct, or its running incredibly lean, which will cause the run on. Hope this helps, What's the compression pressure? what does the plugs look like after you ran it? Chad
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