LS3 Large Chamber Heads?
#1
LS3 Large Chamber Heads?
Hi,
I just picked up an LS3 417 short block and need to replace the CnC'd LS3 (70cc chamber) heads that I have. The block is fully assembled and balanced, but it has -4cc pistons, which should put me around 11:2:1 w/ these heads.
The only advertised heads I've seen that have a significantly larger chamber is the ProComp LS3 heads @ 81cc, but I can't find them for sale anywhere with that chamber size.
Can I please have a recommendation from some of the seasons FI guys here? I've heard AFR 245 and TFS GenX255, but both are small combustion chamber.
I'll be pulling my stock bottom end LS1 and transferring everything over including the D1SC Procharger (for now). I know the blower is much too small for my goals, it's just going to have to work until I can get going on the TT build. My other option is run these heads w/ 91+meth(or E-85) and low boost.
Any help is appreciated.
Thanks,
Matt
I just picked up an LS3 417 short block and need to replace the CnC'd LS3 (70cc chamber) heads that I have. The block is fully assembled and balanced, but it has -4cc pistons, which should put me around 11:2:1 w/ these heads.
The only advertised heads I've seen that have a significantly larger chamber is the ProComp LS3 heads @ 81cc, but I can't find them for sale anywhere with that chamber size.
Can I please have a recommendation from some of the seasons FI guys here? I've heard AFR 245 and TFS GenX255, but both are small combustion chamber.
I'll be pulling my stock bottom end LS1 and transferring everything over including the D1SC Procharger (for now). I know the blower is much too small for my goals, it's just going to have to work until I can get going on the TT build. My other option is run these heads w/ 91+meth(or E-85) and low boost.
Any help is appreciated.
Thanks,
Matt
#4
TECH Veteran
iTrader: (11)
With a .060 gasket with a 4.125 gasket bore size you can get down to 10.7:1. That should be fine for 93 and meth. Cometic makes custom gaskets if you wanted to go thicker.
Any more than that and you are going to have to change the slugs or sell it and get another engine.
Any more than that and you are going to have to change the slugs or sell it and get another engine.