What A/F to run @ 15psi boost

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Jun 4, 2010 | 04:36 AM

bunker

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From: Sumas, Washington

What A/F to run @ 15psi boost

I'd like to get a few numbers of what you guys are running at 5,10, and 15 pounds of boost.

Engine is 8.5:1 402 LS2, twin STS. Just a ball park figure, what should I run for Airfuel? I'll fine tune it on the dyno definitely but some feedback is always good. I'd like to also know how much I should change the A/F by per each pound of boost @ 8.5 compression.

Thanks for any help, dynoing on Saturday.

Also it wouldn't hurt if I get a few timing numbers

just a base figure.

Jun 4, 2010 | 05:07 AM

Bob@BruteSpeed

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11.5/1 above 5000 rpm, backing off to 18 degrees of timing. Bob

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Jun 4, 2010 | 02:07 PM

DeltaT

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I agree with Bob. He didn't mention it but I expect he also likes to approach that end number from a starting point closer to 11.2:1. I see some people coming into a tuning session with 10# at 12.5:1 but that makes me nervous.

Jim

Jun 4, 2010 | 09:03 PM

bunker

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Sounds good, as for Timing, what is the starting point you'd recommend Bob, start and finish.

Thanks a mill, ofcoarse I"ll fine tune on the dyno, but I really like these suggestions.

Jun 4, 2010 | 10:35 PM

OUTLAWZ RACING

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From: COLUMBUS GA.

800 rwhp

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