Better motor combo?
Better motor combo? Planning a rebuild for my road race car and trying to piece together a nice longblock for broad power delivery. For around the same price the two choices are:
LS3 block with GMPP LS3 heads and LS3 intake
LS2 block with either PRC as cast or AI 232 heads and FAST 102 intake
Both will be cammed similarly with the only variance being about the heads themselves.
Would one or the other block make for a broader and more power, or am I splitting hairs here?
LS3 block with GMPP LS3 heads and LS3 intake
LS2 block with either PRC as cast or AI 232 heads and FAST 102 intake
Both will be cammed similarly with the only variance being about the heads themselves.
Would one or the other block make for a broader and more power, or am I splitting hairs here?
Both will do what you want.
I'd probably do the LS2 block with the As-Cast heads, FAST 102, and a Solid Roller.
I'd probably do the LS2 block with the As-Cast heads, FAST 102, and a Solid Roller.
The PRCs do have a little bit more airflow and now come with lightweight valves, will that make a decent difference in power and/or ability to run 7000rpm or is that enough for the AI heads?
I don't think you'd pick up anything regardless of what anyone says. All these heads are probably within 10HP of each other when a FAST is added to the mix.
I still would do the LLSR though. That will add more power than a swap of heads.
I still would do the LLSR though. That will add more power than a swap of heads.
TECH Fanatic
Joined: Aug 2009
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From: Coast of San Mateo County Between Pacifica & HMB
I agree with Jake, Cathedral Heads and LLSR, Also I believe the cathedral
Heads drain back the oil a little better in Road Racing situations
Versus LS3s, read about that in the CF road race section. Research and invest
In your oil system, lot you can do before dry -sump to improve
Reliability/Longevity.
Heads drain back the oil a little better in Road Racing situations
Versus LS3s, read about that in the CF road race section. Research and invest
In your oil system, lot you can do before dry -sump to improve
Reliability/Longevity.
