jonny_WRX

Please can some one help me,

I have installed an uprated fuel pump (wallbro or something like that!!) and have a dawes boost controller to put on. I was wondering what PSI i can crank out of the turbo before the fuel cut off will activate?

the car is a Jap WRX 1995 (260BHP model) if that helps.

Thank you in advanced

jonny_WRX

Also if anybody knows approximately how much more power that would give that would be great to know (i know i am asking alot but i know there are Scooby people on here who know EVERYTHING )

myblackwrx

iTrader: (1)

WRX (1995/96) ECU Z4 - 12.71psi, dropping to 11.78psi @ 6600rpm. Fuel-cut 15.65psi.

jonny_WRX

See i was right about scooby experts, thank you myblackwrx. do you (or anybody) know how much more power i would roughly get taking it to 15PSI?

Am i looking at 30-40BHP? or is that optamistic??

cheers

deanwoodward

im just in the process of doing this i have bought an afr a knocklink and boost gauge to up the boost slowly checking for any activity would also like to now how much can be gained?

myblackwrx

iTrader: (1)

Very optimistic i'm afraid i honestly don't know how much more power but i would advise not pushing the boost so close to the fuel cut.Set the Dawes device to 1 bar (14.5psi) and see what that is like.
If you want more power a remappable ecu is the best and safest way to go (also the most expensive)

988wrx

I strongly advize you install a knocklink before you up the boost, i have the same 1995 wrx as you and at 15psi it started flashing the orange leds and sometimes the red but at 13psi everything is ok as it will stay on the greens,

better being safe than sorry

Jim

jonny_WRX

Thank you, i think i will stick with 13-14PSI to be on the safe side. i dont want to go to the expense of a remap but i will get a knock link and AFR meter to monitor things.

Cheers all

jaytc2003

iTrader: (1)

you still may not be okay with that though, not all engines are the same and they react differently. Get a knocklink so you can at least have a visual idea of whats happening and then slowly increment the boost.

steve_scooby

my advise is to alter the boost via an ecu, bleedvalves are a killer, as the ecu tries to lean boost and fuel at top end of revs the bleed valve still holds high boost

leave it alone , know too many people that have damaged there engines by fitting bleed valves

dont want to melt piston 3

scoobywagonruss

hi sorry to butt in but whats a knock link ? and where would i get one .cheers

myblackwrx

iTrader: (1)

it is a detonation warning device to supplement the standard knock sensor.
Do a google search in images and it shows you what it look likes

Sc0oby

i think 15psi should be quite safe