LQ4/L92 combo - Cam question
07-02-2010, 09:12 AM
#2
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Seems like that cam would have a lot more overlap than most people consider "appropriate" with L92 heads, especially considering the LQ4's lower compression. I suspect that a whole lot less exhaust duration and a much wider LSA would be much better.
227/227 on a 112LSA, 227/230 on a 113LSA, etc.
227/227 on a 112LSA, 227/230 on a 113LSA, etc.
07-02-2010, 05:53 PM
#4
that cam seems close. I would use lobes with more lift though.
A large split is not needed. Maybe 235/239 would be better. The 108lsa is
perfect for a carb setup just make sure it has about 4 degrees of advance
ground into it.
A large split is not needed. Maybe 235/239 would be better. The 108lsa is
perfect for a carb setup just make sure it has about 4 degrees of advance
ground into it.
07-08-2010, 09:41 AM
#6
Don't be so easily convinced. The list of the fastest L92 racers (cars and trucks) is filled with cams that contain smaller splits (4-8 degrees). Remember, the L92 exhaust is slightly better than the LS2/LS6 exhaust port. So if a 239 lobe would have been too big with LS6 heads, then it's going to be too big for L92 heads.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
07-08-2010, 11:56 AM
#7
Agreed....it's not that the LS3/L92 exhaust port is bad, it's just not the super-hero that their intake port is. So you typically run similar exhaust specs to what you would have on the LS1's, but you don't need as much intake duration as they liked...and there-in is SOME split. We do not go crazy and throw 10º+ split at them like some do though and agree that 4-8º is plenty for most combos!
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COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
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POWERBOND - ASP - AND MORE!
