Originally Posted by allansmith859
are those strictly designed to raise compression ratios. Correct me if Im wrong, do they make the so called dome, raised so there is less area in the combustion chamber therfore creating more compression??
Yep, you are right on the money, except they create less VOLUME rather than less area. Once you have the displacement of the dome, you can deduct that figure from the chamber volume and then figure the piston at a zero value for figuring the static compression ratio.
In other words, if you were using that piston I linked with a 76cc chamber, you would deduct the 6cc's of the piston dome from the chamber volume and use a zero value for the piston as you do the calculations for SCR. If the dome is 6cc's, then deducting that from the chamber volume would yield a 70cc chamber for calculating.