Quote:
Originally Posted by Flieger
OK, smart @$$ 
JE pistons do not always spec out to be their advertised compression ratio, even when special ordered. Their shape may not work with your combustion chamber volume and deck height to create their intended compression ratio.
You must check your actual compression ratio when building a modified engine. Too high a compression ratio could result in an engine confined to race fuel.
He probably got "10.5:1" JE pistons and installed them so that compression was 10.2:1 |
I wasn't trying to be a smart a$$! I assumed that the answer was much simpler as you suggested, especially given the small difference in ratios, but in seven years on this board I've heard from many people with impressive technological savvy (and the financial means to experiment!).
Variable compression ratio technology has been around for decades. I was actually hopeful that Danish Dynamite might have figured out a way to adapt this technology or some other technology to his/her car - especially given the concern for gas mileage expressed in the original post.