I didn't know there was a difference in pistons. Good to know for the future. (I'm sure I'll have to overhaul the 806 eventually.)
A lower compression ratio would allow for higher boost pressures to be ran, which would result in more power and cooler EGT's. It's why my old chevy 6.5 supposedly only runs 5-8 lbs boost. I don't have a gauge on it. It has 22 to 1 pistons in it. Later ones and all your 7.3's and 5.9's are at 17 to 1 (Give or take) and run 15-20 lbs boost.
My best understanding is that with a turbo engine, a little lower compression and lots more boost pressure is beneficial rather than the other way around. More potential pressure would also allow the turbo to better adjust for altitude changes, too. Of course, a stock engine running stock rpm's can only support so big of a turbo...
Neat conversation. I hope my understanding is pretty close. If not, I'd like to be set straight. -Andy
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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