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L92 heads and cam
Thread Starter
Teching In
Joined: Nov 2005
Posts: 28
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L92 heads and cam I am building a LQ4 6.0 with L92 heads and I was wondering if a 585 598 lift 238 242 duration cam would work well with my application? Or should I go bigger? It is going to have a edelbrock intake with a 750 dp carb. Thanks
Restricted User
Joined: Jun 2003
Posts: 588
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Well not trying to hurt your sell, but also trying to help the OP with his guestion. And so far his cam choices aren't what should be used with a l92 setup.
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Big cam is not needed with L92 heads. Check out this thread:
https://ls1tech.com/forums/dynamomet...p-446rwtq.html
Although this was an EFI application, it proves that you don't need a huge cam to make big power with L92 heads.
https://ls1tech.com/forums/dynamomet...p-446rwtq.html
Although this was an EFI application, it proves that you don't need a huge cam to make big power with 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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
You also have to remember you have about 9.1:1 compression with that combo. I would change cams. Shorter duration, more lift, lots of area under the curve. Makes the car much more livable and uses the heads you have well.
I went with a 219/235 .607/.621 113+4 on my LQ9 with Lingenfelter CNC L92/LS3 heads. You don't need 240+ duration on many street driven especially when you have low compression and heads that flow well. When selecting cams, I tend to go to the smaller of my two selections and have never been disappointed.
My dad always ran 260/270 .670 lift cams on a 106 and taught me that bigger is better, now Ive learned that he was way off in his thinking. Its all about combination!
Check your Piston to valve clearance with those giant valves!
I went with a 219/235 .607/.621 113+4 on my LQ9 with Lingenfelter CNC L92/LS3 heads. You don't need 240+ duration on many street driven especially when you have low compression and heads that flow well. When selecting cams, I tend to go to the smaller of my two selections and have never been disappointed.
My dad always ran 260/270 .670 lift cams on a 106 and taught me that bigger is better, now Ive learned that he was way off in his thinking. Its all about combination!
Check your Piston to valve clearance with those giant valves!
Thread Starter
Teching In
Joined: Nov 2005
Posts: 28
Likes: 0
I guess I'm going to do a custom cam. What place do you guys recommend at a fair price? And what is my compression going to be with the LQ4 pistons? I still have my 317s, would I be better off using them for now? This is going in a 2700 lb Iroc that is a street strip car, not a daily driver.
