what cc's are:

5.3 heads
5.7 heads
6.0 heads

thanks

 

do you mean c.i.? cubic inches?

 

https://ls1tech.com/forums/showthread.php?t=213148

 

5.3 61cc
5.7ls1 66cc
5.7ls6 64cc
6.0 72cc

 

Is that correct for the 5.3, if it is, time to get some 5.3 heads.

 

Yes. It's actualy 61.15 or 61.1something cc's. But the above stated is close enough.

James

 

so how are people putting on the AFR 205 heads on there 5.3's? they have a 66 cc chamber. i know the flow of the heads are better but you would be losing compression. how does this work?

 

they mill the head down to reduce the combustion camber

 

If you plan on putting them on the 6.0 i'd think twice. The intake valve's are smaller and the ports don't flow as well. LS6 heads flow basically the same as 317's (6.0's). You can get larger valves and ported 5.3 heads though. This is a common upgrade for the LS1 guys.

 

when they mill the heads down do you have to get a new set of pushrods? or is it not enough to tell?