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highest hp on stock LQ9 heads?

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Old 08-02-2006, 07:03 PM
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Default highest hp on stock LQ9 heads?
Just curious what the current "record" is.. havent seen many people with 600+ using stock heads on here even though im sure they flow enough to be taken into upper 600s with boost no problem.
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Old 08-02-2006, 07:33 PM
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606 rwhp on 8psi on stock 317 heads for me. ECS has stage 1 combo that makes 740rhwp at 14psi with there Novi 2000 kit.
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Old 08-02-2006, 08:26 PM
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dosent W2W have their turbo kit on a couple LQ9/LQ4 truck motors with stock heads hitting 800?
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Old 08-02-2006, 08:47 PM
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We have had a couple of cars make over 600 with stock #317 heads; one over 650
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Old 08-02-2006, 09:59 PM
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ported ones have gone bottom 8's, 170+
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Old 08-02-2006, 10:28 PM
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i got to 640rwhp thru a tcase and 4l80e. the turbo was maxed. i bet it would go 800rwhp easy with more turbo.

this was a t76 on a 6.0 with cam, springs, head studs and rod bolts. something like 14psi.
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Old 08-02-2006, 11:18 PM
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(Cablebandit) Jerry has hit 750RWHP with them and out of turbo. And now I think with his new turbos he is going for around 850 RWHP
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Old 08-02-2006, 11:22 PM
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Ill see with my PTK setup, forged motor and T76
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Old 08-03-2006, 01:07 AM
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1,200 rwhp.. is highest I can recollect. I not sure what the record is, there is probably a dedicated track car pushing more.
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Old 08-03-2006, 11:22 AM
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Originally Posted by parish8
i got to 640rwhp thru a tcase and 4l80e. the turbo was maxed. i bet it would go 800rwhp easy with more turbo.

this was a t76 on a 6.0 with cam, springs, head studs and rod bolts. something like 14psi.
wow! i thought the 6.0 ha weaker rods/pistons than the stock ls1! was that an all iron 6.0 or an aluminum headed one?
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Old 08-03-2006, 11:28 AM
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Made 650 with 317 LQ9's hand ported
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Old 08-03-2006, 10:37 PM
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NO porting, just a 3 angle valve job. Zo6 cam, stock 5.3 block, 630hp 684tq.
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Old 08-03-2006, 10:45 PM
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I remember when Rob Reymer (sp?) made like 800 rwhp on stock 6.0l heads
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Old 08-03-2006, 10:47 PM
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you mean "supposedly" made
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Old 08-04-2006, 06:23 AM
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mine arent stock...they are gtp s2 #317...bout 2 years old or so.
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Old 08-04-2006, 05:22 PM
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will an angle job increase power?wat is better 5 or 3?also will a small port and polish job help for 500 rwhp t70 build or it will be just a waist off money
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Old 08-05-2006, 02:46 AM
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Originally Posted by cablebandit
mine arent stock...they are gtp s2 #317...bout 2 years old or so.
I thought he meant just with a GM 6.0L Head untouched or not.
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Old 08-05-2006, 07:16 AM
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i didnt know but wanted to clarify for any who wondered
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Old 08-05-2006, 10:11 PM
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What has anyone done with a D1SC and 317 heads? Im wondering if i should spend the $ on big fancy heads now.
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Old 08-05-2006, 11:03 PM
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I'm curious about this too...That's the setup that I'm going to be running soon too...
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