Quote:
Originally Posted by xc_SS/RS
how do these compare to the GMPP heads? These probably flow better because they're LS7 style, but curious how they compare on price. PM me if you can't post the price here
thanks!
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You just cant compare. GMPP are CNC'ed stock LS3 heads. Those GPI heads are totally custom. They will outflow/ outperform GMPP in every aspect, IMO, plus you can run the LS7 or MSD intake on top of that, and much bigger cam without PTV problem, so higher compression too. Thats the beauty of aftermarket heads, plus this one solves the intake manifold problem!
GMPP performance/price ratio is really hard to beat and they perform as good or better as other ported LS3 heads. But since no one ever made a back to back dyno comparison with a
stock cube/cam/IM LS3, or cam only, you cant say one is much better than another CNC'ed LS3 stock casting head. There is some badass CNC program outhere, but no one has numbers VS numbers dyno.
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13' 1LE
Old setup: TSP 231-236/Tick 660/.105 PR, UDP, SW LT 2'' & HFC, stock NPP & H pipe, VR-DRX CAI, air scoop, Goertz1 manifold, 102mm BBK, 26" Toyo DRs, Forgestars R17x10 & F18x8, rear seat delete, remote Pat G tune Autocal, 7400 limiter, Spec Mini Twin. 91oct. 11.90@122.3, 0-60ft 2.0 / 11.99@123.6, 0-60ft 2.1 DA+819 ...519RWHP SAE
Solid roller SBE LS3, FED, LLSR, 91oct, 605rwhp N/A. Tuned by Pat G. Build by me.