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Originally Posted by q2cmy00
35 psi. i was told to get a hks evc by allstar. 2 stage electronic controller. nice display too. i wouldnt wind the boost up at all with out checking the air/fuel ratio. i have the same engine as you and i am expecting 16-18 psi when tuned
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35psi? like fuck you can!!
q2cmy00: Don't talk shit that could cost someone their engine, ya tool!
Without a retune 18.5 psi is max safe (which is stock boost actually). Only retune option for 99-00 sti is an ecutek or stand alone
ecu (link, Autronic etc).
Don't even bother with with a boost controller until you have done supporting mods (i.e fuel pump, exhaust, CAI etc).
Factory control is fine (and the safer option) until you fit a bigger or modded turbo.
Plenty of V5 Sti's were going boom with factory 18.5 psi boost limit when first released, due to excessive timing in the factory mapping. V6 were tuned less agressively timing wise but run the same boost targets.