I was reading the thread about the HEI ignition and the recommended gaps were anywhere from .045 to .060. Is there a point on a gas engine that is too much? The reason I wonder is, that on a propane engine you should run around .025. I had a 318 Chrysler with electronic ignition on an irrigation pump that I fought for years trying to get it to start and run right. It always started hard and always seemed to have a half ways miss in it. I can't tell you how many ignition components I changed trying to get it get it to run right. I was running about .045 on the plugs. I thought the wider the gap, the better. One day, out of frustration I called probably the second best mechanic in the county and he asked what the plug gap was. I told him, and he said it was far too wide for propane. He recommended .025. It made a whole different engine out of it. It started instantly, sounded perfect at all rpms and loads and took less fuel. He was truly an excellent mechanic. He could tell by looking at the plugs almost anything that was wrong with the engine.
He died 2 years ago coming up in June. I sure miss that guy. As good as he was as a mechanic, he was even better as a person.
Last edited by Crabbyappleton; 12/27/2010 9:41 PM.
