Help on 408 build

With a Felpro 8553PT head gasket (standard kit gasket, like it appears you have now), I am coming up with 9.7 for the SCR for those Wiseco's. With your cam, installed at an ICL of 108 degrees, I get DCR of 7.9. So that gets you to manageable/tunable point on the DCR number.

The Wiseco catalog says 527-530 grams for piston weight, and a pin weight of 126 grams for a piston+pin total weight of 654 grams +/-. That is almost 30 grams heavier than what is in there now IF IF IF you presently have the Icon IC744's in the present. So IF that is the case, then a re-balance is needed... 30 grams piston weight change is too much to ignore IMHO.

But: Please call SCAT to verify the pistons that you have or see if you have that in your paperwork. No need to go down the wrong road again based on anyone's 'best guesses' on what pistons you have.

Also, look to see if those Wiseco's are the same oversize as your present piston if you decide to use them. But I personally would not.... I'd go with ICON 745's and probably decide to live with the 10 gram weight change, since this is a street engine, not a full race engine. Again, this matter on piston weight assumes you now have Icon IC744's....please verify.