willie_c

i hav a 95 wrx with 3" straight exhaust, uprated oil and fuel pump! im lookin 2 increase the boost 2 get a bit more performance can i safely do this without risking my engine? if so what will i need

Glowplug

iTrader: (8)

To increase the boost you will need to increase the fueling to. I have a pp chip fitted with a mbc and afr meter, am boosting to about 1.2bar which is about the max of the standard map sensor (approx 1.23 bar iirc)and the standard ecu will hit fuel cut before this though. To be honest you will need a aftermarket ecu or a remap of some sort to increase it safely

tweaks

iTrader: (7)

what boost is it running now ???

willie_c

its runnin standard boost which is what 0.8-0.9?

tweaks

iTrader: (7)

i ran 1.1 on mine with standard ecu and was fine, rich infact.

STI_Baly

iTrader: (23)

You will be able to run 1.1, but remember this is not the correct way and an after market ecu should be used.

Plus if your not happy with the standard boost you will want more when you max this out. So do it right the first time and save yourself spending a shed load when you blow the engine or do the head gaskets. High mileagers tend to give up the ghost quicker.

Good Luck

Jamz_

iTrader: (12)

Mine is running 310bhp on 0.8bar of boost... i did have it around 1bar but hit fuel cut all the time, so knocked it back down...

willie_c

what mods do u hav on ur car 2 run 310bhp at 0.8bar?

Glowplug

iTrader: (8)

Mmmmmm, what mods do you have Jamz,
just a wild stab in the dark but i think,
Apexi Induction Kit
Front Mounted Intercooler
Manual Boost Control

Darc174

iTrader: (13)

where did you get them figures?

mbd sti2

iTrader: (2)

just what i was thinking my v2 sti has run 302bhp at 1.2bar with td05 turbo, fmic, els live re-map and full 3" de-cat

Jamz_

iTrader: (12)

Here you go:




From what i can tell its running stainless headers, decat up pipe, FMIC Standard down pipe (i think) and 3 inch cat back with standard ECU

Jamz_

iTrader: (12)

no wait... 15psi is around 1 bar innit?

Hmm boost guage must be goosed

myblackwrx

iTrader: (1)

15psi is just over 1bar (1.03bar)