fotyfobravo

I am pretty sure my original 454 pistons had a 4.25 bore. IF I bored the cylinders .30 over....would my new bore be 4.55 ???

If YES....with the stock 4.0 stroke.....what is my new cubic inches using the original 781 (118 cc) heads......????????

I've had c3s since 1970, but never been this deep into one!

Thanks for any info on what I've done....

Little Mouse

454, .030 over 460 cu. .060 over 466 cu.

zwede

If you bored the cylinders 0.30" over there would be no cylinder walls left.

A "30 over" means 0.030" and your new bore will be 4.28".

fotyfobravo

OK....30 thousands......0.030...

...not .30 which would be hundreths

Thanks,

I kept coming up with 520 cubes and was getting scared!