Ben2563

Guys,

As above however according the the Chassis number it was 280bhp from new (310 now). Now am I right in thinking the later WRX's were only 240bhp?

My reason for asking is I think my ECU is shagged and I need to replace however I dont want to do this if the reason for my WRX being 280bhp out the factory is the ECU programming. I dont want to reduce it by fitting a later WRX ECU.

Make sense?

Cheers

Ben

myblackwrx

iTrader: (1)

Late model wrxs were 280ps (276bhp) the increase in power came in late 1996 (Sept).

early wrxs were 240ps (92-94) then 260ps

Ben2563

Oh, apologies I had it the wrong way round. Where did this increase come from? Was it the ECu programming or were there changes in the Cams etc?

flashgordon666

To know for certian here
Which Car is a WRX STi

Yours is ither 240 or 280.

Ben2563

Mine is definately the 280 but what i am trying to understand is the difference between the 240 and 280 that causes this increase.

myblackwrx

iTrader: (1)

for the early 4 pin plug ecus it's just a case of altering the fuelling maps and a slight increase in boost.
I'm not sure about the late model WRXs but i would guess same would apply as far as i know the wrx engines are the same from early to late models.

bloop3d

hi, this was associated with the increase in the octane rating of fuel avaliable in japan,basically 102 ron enabled the boost to be turned up abit and the tdo5 was swapped for a vf22 roller bearing unit.