2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

how much boost can i run

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Old Sep 14, 2006 | 09:37 AM
  #1  
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From: Prosser Washington
how much boost can i run

i know this is a common topic but i cant find a firm answer.
here are the mods

JDM trust 3 row fmic
tial bov
stock turbo
3" tid
safc II
NGK wide band
DEFI EGT gauge
rewired walbro 255
550cc primary injectors
750cc RC secondaries
stock port motor
koyo radiator
full emission removal

any andvice is appreciated.
i know with 4 stock injectors and stock boost i ran a 13.58, and by uppin the boost a lil i got it to a 13.50. i am hoping to get lower in the 13s and like 15psi boost.. what do you guys think???
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Old Sep 14, 2006 | 09:48 AM
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From: Charleston, SC
I wouldnt run any more than 12psi, you will just blow your turbo. The previous owner on my TII was running 14psi on stock turbo with just about the same as your setup, and now the turbo blows oil and smokes on hard runs

edit: i believe the previous owner was running low 13's at best at 14 psi
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Old Sep 14, 2006 | 09:59 AM
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well i have a "decent" s5 turbo on it now, but i have a really nice s5 waiting to go on. lately at 10psi i havent been able to keep a turbo so i stock up on them. thier average life span is about 2-4 months. ive heard of some running 17 but i know better than that. i was hoping for 15 though.
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Old Sep 14, 2006 | 10:01 AM
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anything more than 12psi is just hot air no good power gains.
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Old Sep 14, 2006 | 10:08 AM
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From: Prosser Washington
Originally Posted by snowball
anything more than 12psi is just hot air no good power gains.
well it may be hot air with the stock TMIC. but with the trust 3 row i would imagine it should coot it down.................
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