Power Robbing

[GC82GO]

Howsit~! alright, What i have here is a Cheap Project WRX i picked up not long ago. Now before i say whats next, no1 flame me ok, dont get me wrong, WRX's are wicked cars, AWD is awesome.... But to boring... So im making it RWD, of course i could have brought a Skyline or s13,14 , But i like WRX's, The sound and the look.

Now ive gotta problem with the engine, The WRX was $1300, so i expected half of it to not work or be broken. its a 1996 Ver 3 JDM WRX in black (sedan) which "said" 86,000kms on the clock, Ive confirmed it on carjam, but upon further inspection of engine i found that it had been replaced with a Ver 1-2 engine.

What could be causing my car not to run over 7psi? Ive got a V3 STi ECU, Injectors, and AFM installed.... many times have i checked the Boost lines to only find them all still connected (no leaks). Im running with a TD05h turbo, 3 inch down pipe and HKS Silent Hi-power Cat back Exhaust system.... Could it be that the engine i have now is poked, Though, it isnt blowing any smoke... Car runs mint on 7psi... Im confused and stuck...

[funkytown]

one would assume its got the V3 loom in it - Kameniko did this to his v2, has a version 3 ecu and loom on a v2 motor - not an easy task by any means.

Does it run a boost controller or a stock boost solenoid?

you said you checked all the lines for leaks - are the plugged into the right places?

Is the V3 ecu a STI ecu or a WRX? (what does the rex run standard about8-10psi i think)?

Is the ECU showing any fault codes (thus in limp mode and not boosting)?

Have you checked another boost gauge to make sure your getting an accurate reading?

Some places for you to start looking...

[nzkaosnz]

stock boost controller could be jammed/broken etc. 7psi is wastegate pressure.

Look for an EBC somewhere - and throw that onto it.

[GC82GO]

funkytown: Its just a version 2 block, it has a Ver. 3 STi Intake Manifold and matching loom for that year (3-4). It has stock boost control which I setup the same to my mates Ver 3 STi RA that has stock boost control. The ECU i personally took out of a Ver 3 STi. The car boost's fine for 7psi but it just won't go up... Ive also replaced all lines to make sure there wasn't any restrictor pil.

nzkaosnz: Posibly, I have a spare boost control from a Ver. 3 STi that i guess i should try. Ive tried a "Boost Tap" but that didnt seem to raise it either... :-X

[nzkaosnz]

interestingly enough - the restrictor pill actually increases boost

depends on how the boost tap is set up.... possibly try a manual/electronic boost controller if you can get one.

def try another boost gauge before getting drastic...

could VERY carefully try freeboosting (with a mate yelling at you the minute you start hitting high boost) to just check that that parts all set up sweet.

[Koom]

 GC82GO said:

The car boost's fine for 7psi but it just won't go up... Ive also replaced all lines to make sure there wasn't any restrictor pil.

Is it the two port boost solenoid? You need to restrictor in there to make it work otherwise all you'll get is wastegate boost as the solenoid can't bleed off enough air to be effective.

[Pappu1]

 nzkaosnz said:

could VERY carefully try freeboosting (with a mate yelling at you the minute you start hitting high boost) to just check that that parts all set up sweet.

try that bro - as soon as u hit 11-13 psi u can get off the gas cos that def proves that the turbo is not stuffed

then use a tap or ebc to set the boost u want

16 should be nice and sweet mid range power

[Swindog]

True you may have the boost controller setup wrong. I had this on mine. Was a pain in the bum till i figured out i had it all wrong. Wouldnt go over 12psi which was the external spring pressure