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 - Tractor Profile: Earthmaster - by Staff. This tractor, manufactured by the Earthmaster Farm Equipment company in Burbank, California was made for only two years. The Model C came out in 1948 and was followed by the "CN" (narrow-width model), "CNH (narrow-width high-crop model), "CH" (high-crop), "D" and the "DH" (high-crop) in 1949. The main difference between the models was tire size, tractor width and cultivating height. The "D" series were about 20 inches wider overall than the
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