Quote: got this on the net." now for the useful stuff. Cylinder heads. big changes here, new closed chamber heads have smaller chambers (duh) than previous engines , 66.3cc in fact vs 84.9cc. even smaller than the 6.1's with 73.0cc. bolting these on to a previous hemi without modification would result in nearly a 12:1 compression ratio.
Are there pistons available to get a lower compression ratio than 12:1 using these heads on an earlier engine?I assume the stock later piston would work,not sure what CR is on late hemis though. RT
Well there is always custom. I am not sure of the 09 piston but I think they would work. I think 09 got a compression boost. Matt
