I have a 1994 impreza WRX Jap import wiv a TD04 turbo, Im running a Decat exhaust system wiv downpipe and racing ecu, i have a choice of getting a TDO5 TURBO OFF AN IMPREZA 1996-N REG Or TD05H-16G of GC8 IMPREZA WRX STi Version 2 STi.

Which is the best turbo to go for?

Thanks for taking the time to reply

 

I'm not sure but i was under the impression that there the same turbo! If that is the case get which ever one is newest and/or in best condition.

 

I actually thought all the Jap scoobies had a TD05 as standard, it was just the mapping on the standard ECU that decided what the power out put would be,
i.e. 260 bhp early models WRX, and 280bhp for the STI,
I also would be interestd in what a RACING ECU is exactly

If you are upgrading you turbo no matter what you do I would suggest you look at an aftermarket mappable ECU, before you put the new turbo on.
Jap cars over hear are already at risk from the lower octane petrol, therfore the dredded det.
By putting on a bigger turbo your throwing in more air therfore you may lean out your engine and BANG

I would double check your turbo make, before anything else as my 95 WRX came with a TDO5 16G as standard, you can get this turbo with an 18g or a 20g, more than enough for high 380bhp,

Kev

 

My MY93 wrx had a TD05 as standard as well as already stated check what you have fitted before buying something else

 

Aside from the mapping issues pointed out below -which are critical- you also need to be aware of the issue of gearbox longevity. You've got a 12 year old car, putting a TD05 on it -if you intend to run it to its potential- would most likely be the kiss of death for the gearbox- then you'd need to budget for a a replacement/rebuild (not cheap).

You might want to look at a TD04 hybrid from Andy F.

To be honest though, any power upgrade is a bit of a gamble.

Ns04