SAFC boost and fuel question

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Dec 9, 2003 | 02:36 PM

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MOORESPEED12

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SAFC boost and fuel question

I got a stock LS motor with turbo kit (62-1) SAFC and DSM 450 injectors. Im going to turn the boost up between 10-12 psi and I was wondering if some one could tell what they think I should run my fuel map at from 1000-8000 rpms. So far someone told me to just run it at -40% all the way across. Let me know what you think. Thanks

Tony

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Dec 10, 2003 | 07:19 AM

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99B16Si

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every car is different, u need to put it on a dyno w/ a wideband to have it tuned precisely

PS -40 across the board my work under partial throttle but youll need to compensate for the added boost pressure

Dec 10, 2003 | 07:56 AM

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qitstrn

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what do you have for an ECU? If it's stock you shouldnt have bigger then 370 injectors. 450's are big for a stock LS motor. I had 310"s for a while on a built gsr on 10 lbs.

Dec 10, 2003 | 08:35 AM

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John

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Dec 10, 2003 | 10:48 AM

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MOORESPEED12

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thanks guys for the info I'll try it out...after the holidays I definitly plan on getting it on a dyno.

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Dec 10, 2003 | 01:12 PM

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qitstrn

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Quote:

Originally posted by Vapor
you'll be lucky if you dont blow it at 10-12lbs on that turbo with only 450s running at 100% duty cycle. I'd set it at -31% all the way across, or the max you can run without throwing a cel for map sensor. I'd also get it on a dyno with wideband asap

when i had th 310's i was pushing 10 lbs with chipped ecu and vafc making 280/185 with 11.8 a/f all the way across. Why would he need that big of an injector? I dont know the car and all he has. I wanted to now how do you decide what size of an injector would be best for an aplication?