650 Hp headers- What size pipe?
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650 Hp headers- What size pipe? What size engine pipes and twin exhaust would you need for a motor that puts out 650Hp N/A at the crankshaft? Cheers Russ
Last edited by Ls2 cruiser; Sep 24, 2009 at 05:38 AM.
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From: se mich(pluto)
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I am buying the Trickflow 225cc CNC ported 65cc comb. chamber heads. These heads flow 259cfm on the exhaust at .600 lift. I have found a graph on the net under David Vizards exhaust article and according to this graph it is something like 2 1/8" primary. Then because I am running 8 psi boost the pipes could even go bigger. My ls2 is still 364 cubes. Does anyone have any other thoughts on this? Cheers Russ
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From: se mich(pluto)
I am buying the Trickflow 225cc CNC ported 65cc comb. chamber heads. These heads flow 259cfm on the exhaust at .600 lift. I have found a graph on the net under David Vizards exhaust article and according to this graph it is something like 2 1/8" primary. Then because I am running 8 psi boost the pipes could even go bigger. My ls2 is still 364 cubes. Does anyone have any other thoughts on this? Cheers Russ
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From: Webb City, MO...out in the garage
Go 2" and be done with it. i've got 2" Kooks on my 454 and it's NA. a boosted 364 will move the same or more air than my 454, the more pipe you have, the better. i would AT LEAST go 1 7/8" stepped to 2" witha 3.5" collector, but that's just me. the car would still run fine with 1 7/8" x 3", but i'd go bigger.
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From: se mich(pluto)
you could use 2in headers but might lose a little down low with small cubes.when we dyno tested my motor we tryed stock ls7,1/34,1/78,2in headers mine just liked the 2in ones.i will tell you there was not a huge diff between them all.i made 653hp on the stock ls7 quads.
Last edited by tals7; Sep 29, 2009 at 02:27 PM.
