Clarkie GT

is it possile/safe and advisable to switch from a wrx to a stil ecu from the same year (classic)

joz8968

iTrader: (13)

What MY do you have first?

myblackwrx

iTrader: (1)

you have a 95wrx iirc so technically yes but i tried this with my 93wrx (putting a 6K ecu into it) and it brought the MAP sensor error code BUTi do believe a few people are running them with no problem

Clarkie GT

yeah, 95 wrx. so the MAP sensor would have to be changed? to a 3 port? is the MAF sensor compatible. would it need mapping? cause wrx have 380cc injectors dont they? and stis 440cc?

my94wrx

iTrader: (4)

no you dont need to change anything apart from the ecu, assuming you have a tdo5 turbo, as the turbo and the intercooler were the only external differences between the early v1/2 imprezas,
so if your car is a saloon wrx and still has the original tdo5 fittted (many come from japan with what ever turbo they can find fitted) the ecu would be a straight fit.

Clarkie GT

ah cool... it's actually a wagon, so got a TD04 atm, but turbo needs replacing so gonna go for TD05.

was gonna go down the ESL remap route, but that's £500 min, STI ecu sems better value

my94wrx

iTrader: (4)

yes thats right, replace turbo with tdo5 run on sti/z4 ecu then you are laughing.