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Who's boosting L92 heads?

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Old May 17, 2012 | 05:10 AM
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Default Who's boosting L92 heads?
Just wondering who's boosting L92 heads? If so, did they lift? At what boost level did they have issues?
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Old May 17, 2012 | 06:12 AM
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I'm still testing & tuning but I've seen 11psi with stock LQ4 shortblock, LS9 gaskets, & ARP studs. No problems that I know of but I only have a couple hundred miles on the setup
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Old May 17, 2012 | 08:44 AM
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L92 heads, LS2 block, LS9 gaskets, ARP Studs @ 80#, no problems at 20psi.
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Old May 17, 2012 | 10:58 AM
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L92s, Aluminum 403, twin MP76s 23lbs of boost, never lifted a head. Running LSAs on my build, plan on making over 1000whp.

http://dbrodsandminis.com/twin-turbo-tbss.php

http://www.youtube.com/watch?v=bjWwHPHxfi0

http://www.youtube.com/watch?v=ZfkAp9zuZHM
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Old May 17, 2012 | 11:04 AM
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A properly prepped head isn't going to lift just because its so-and-so head. Using bolts that aren't up to the task, though...that'll cause a head to lift.
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Old May 17, 2012 | 01:20 PM
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Originally Posted by smokeshow
A properly prepped head isn't going to lift just because its so-and-so head. Using bolts that aren't up to the task, though...that'll cause a head to lift.
Not always so. Veee8 on here used the and lifted them on 15 psi. he had a prepped block and heads and was using head studs. Its more in the tune and fuel used than anything. cjg454 on here is at 20+ psi but he is using e85 which is a big factor.
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Old May 17, 2012 | 02:00 PM
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People say that the L92/LS3 heads have thinner decks.
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Old May 17, 2012 | 04:47 PM
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my buddy baked made 978 with stock L92 and e85
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Old May 17, 2012 | 05:27 PM
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Originally Posted by 87silverbullet
Not always so. Veee8 on here used the and lifted them on 15 psi. he had a prepped block and heads and was using head studs. Its more in the tune and fuel used than anything. cjg454 on here is at 20+ psi but he is using e85 which is a big factor.
I have run L92 heads over 15psi on pump gas and not lifted them. That's with head studs as well. Block was never decked and heads never surfaced, just dropped in. So someone else lifting them with less boost...something sounds fishy.
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Old May 20, 2012 | 11:05 AM
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Anyone run these back to back compared to a 317 head? I know what the technical differences are between the two. I have both of these heads so I am on the fence on which to use for a turbo build.
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Old May 20, 2012 | 02:35 PM
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19-25psi no problem.

5.35@133 in the 1/8th.

Local car that runs in RS275.
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