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LS3/L92 Heads on a boosted application

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Old 09-28-2012, 03:05 PM
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Default LS3/L92 Heads on a boosted application
Does anyone have experience with the LS3/L92 heads on a boosted application? How thick is the deck? Do you guys think they would be ok at 10psi through a procharger on an LS3 416 stroker?
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Old 09-28-2012, 05:27 PM
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I don't know from experience but I've heard a Blower Type cam + LS3 heads on an LS9 make 50-70 HP(per GMHTP).
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Old 09-28-2012, 06:45 PM
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Those heads would work fine for that. I think cj454 or something ran like 25lbs through the l92 style heads. I know it's a white SS but I can't remember his SN on here.
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Old 09-28-2012, 06:59 PM
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A buddy of mine has a 370 with l92's and a pat g custom cam. On 18lbs from an s480 it made 800+ whp and has had no issues what so ever in the 3000+ hard miles he's put on It
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Old 09-29-2012, 08:59 AM
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Originally Posted by brians91formula
Does anyone have experience with the LS3/L92 heads on a boosted application? How thick is the deck? Do you guys think they would be ok at 10psi through a procharger on an LS3 416 stroker?
Who is building your stroker?
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Old 10-01-2012, 08:24 AM
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Originally Posted by N2OBaby
Who is building your stroker?
Most likely Virgina Speed or Texas Speed. Why do you ask?
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Old 10-01-2012, 09:32 AM
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Go with an lsa head. Much better pieces. L92/ls3 heads are garbage. They will seal initially, but once they push water, they will never seal right again.
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Old 10-01-2012, 02:57 PM
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Not to take business away from those 2 good companies but aes would be a good choice with their 390 ci motor.
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Old 10-01-2012, 02:59 PM
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And I second LSA heads. They are cheaper and made of a stronger material than the ls3/l92 heads.
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Old 10-01-2012, 03:09 PM
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I push 20+ on my L92s...the LSA heads are better though
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Old 10-01-2012, 05:09 PM
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Originally Posted by brians91formula
Most likely Virgina Speed or Texas Speed. Why do you ask?
Curiousity.

+2 for AES.
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Old 10-02-2012, 10:05 AM
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Originally Posted by N2OBaby
Curiousity.

+2 for AES.
I don't like the idea of an iron block. Not sure how much a forged LS3 stroker would cost through them. Maybe i'll toss them a call.
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Old 10-02-2012, 10:12 AM
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I'm on an LS3 with LQ cast iron block and L92 heads. I'm running 226/232 115 LSA w/ .563/ .574 lift. Car runs great and spools damn quick.
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Old 10-02-2012, 01:04 PM
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I'm running a set of WCCH Stage 3 L92s. I made 803/825/818rwhp on three dyno runs yesterday on 16psi with an LS3 based 377 and a vortech Ysi. Worked fine for me.
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Old 10-03-2012, 05:21 AM
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I made 964rwhp through a stalled auto on a set of stock l92's and never pushed any water. 5 layer GM MLS gaskets and ARP bolts, not studs...
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Old 10-03-2012, 06:03 AM
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Originally Posted by brians91formula
Does anyone have experience with the LS3/L92 heads on a boosted application? How thick is the deck? Do you guys think they would be ok at 10psi through a procharger on an LS3 416 stroker?
At 10 psi you shouldn't have any problems at all with the LS3/L92 heads. Bob
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Old 10-03-2012, 06:12 AM
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Originally Posted by BAKED
I made 964rwhp through a stalled auto on a set of stock l92's and never pushed any water. 5 layer GM MLS gaskets and ARP bolts, not studs...
What size cam how much boost?????
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Old 10-03-2012, 08:30 AM
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Originally Posted by Bob@BruteSpeed
At 10 psi you shouldn't have any problems at all with the LS3/L92 heads. Bob
Cool! I think i'll stick with the LS3/L92 heads at 10psi and then buy an aftermarket casting if I ever wanted to turn it up.
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Old 10-03-2012, 10:49 AM
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Doesn't Trick Flow and Procomp make LS3 heads that are better than the GM originals?
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Old 10-03-2012, 11:44 AM
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I made 736 RWHP / 642 LBFT on my G8 with GMPP LS3 heads.
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