Quote:
Originally posted by rcc85:
The ITCS says "...... Under no circumstances may the compression ration be increased by more than one-half (.5) point".
Depending on combustion chamber design and overbore, shaving the head to the maximum might give you more than a one-half point compression increase.
That would, of course, be illegal.
That figure refers to the manufactures specs right? .... and those usually have tolerances, don't they? So if the Audi spec reads 9.0 plus or minus .5, he could actually wind up at 9.99 and still be legal, right??