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Stock lq4 boost ??

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Old Jan 27, 2014 | 08:47 AM
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Originally Posted by andry3000
I have a 2004 lq4 going into a 98 trans am and was wondering will it live at around 15 psi from a 76mm turbo or do I need to regap the stock rings? Any tip or advice appreciated .
I had an '01 LQ4 with 31k miles from the salvage yard (build thread in sig). ARP Head studs, rod bolts and regapped rings. LS9 gaskets, 80lb injectors and PT8847 turbo. Everything else was stock LQ4. Ran 15 to 16 Psi all year @ 16* timing (200-250 1/4 passes and some street driving) and @ 4255lbs through th400, loose converter & 9" it ran 10.20's @ 133. Did nothing but change the oil twice and added fuel all yr. It was alot of fun. It bent 3 rods at 18 psi, it unloaded tires bad and got into bad det which caused the rods to bend IMHO. Guessing I was in the 740whp area, 137mph that pass with bent rods.

Last edited by BMF_Racing; Jan 27, 2014 at 08:53 AM.
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