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Originally Posted by sr20tom
I have an S13 SR20det Blacktop and a walboro 255, and stock injectors. I sometomes cranck up the boost to 13 psi and dont know if its really safe? I have the Apex 550s and a z32 maf but did not install them cause gas is 2.50/ GAL. When i crank it up, my Greddy EGT gauge doesnt really go up that high on boost, but i still want to be safe. Is it ok to up the boost that high on a stock motor with a FMIC and stock injectors?
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You're fine, tho personally I wouldn't leave my boost at 13 for normal driving or even track events, just to be safe. Not because your out of your injector's duty cycle, but because you're hitting the redline of the stock T25's efficiency range, 11 or so would be fine all day long, but I wouldn't do 13 unless it was just for drag or something.
Cover Yoshi's Arse Statement: This is all provided that all your components are tip-top shape, the engine is properly broken in and doesn't have too many miles, the driver doesn't do something stupid (cuz that happens), AND you live in a parallel universe where there is no such thing as mechanical failure.
That being said, if I were u, I'd hit 10-11, it give u a little fudge room for overboost or spike... granted, that's not a whole lot of space, but it's better than sitting right at the edge of the turbo's efficiency.... excessive heat is bad... oh... and along those lines, do you have a FMIC to cool all that down?
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nm the FMIC part, u mentioned that at the end of your post and i missed it.