L33 head camshaft specifications

[zgeezer]

Does anyone here have specifications on the L33 heads and camshaft? Where does GM pickup 310hp from the 285 hp 5.3?

Thanks,

g

[Nitrous]

The HP comes from the compression ratio, it should be higher on the HO and like dozerdan said the heads are different. I was thinking of something else. I think I have the specs somewhere let me see and I'll get back with you.

[dozerdan]

the L33 has different heads which gives it higher compression, which is where the extra power comes from, and it has an aluminum block

[Nitrous]

The head numbers are 12564825 which are the LS2 and Z06 heads and the camshaft is 12583623.

Hope this helps.