94 WRX tuneing advice

[bigjonboy]

Hi i have just bought a modified 94 wrx it has spax suspension, ap racing 4 pot calipers 330 discs with ferodo racing brake pads braided brake lines rear brakes ap 2 pot with ebc standard size disc with ferodo racing brake pads braided lines it has a rogerclark straight through exhaust with prodrive back box the engine was rebuilt 5000 miles ago with rcm stainless manifold and up pipe acl race middle thrust main 550 injectors stage 1 uprated fuel pump fmic omega 50 pistons flappy paddle clutch kn induction kit bov the previos owner stated that the car has not been remaped it builds boost then hesitates then comes on full boost i dont know what the boost pressure is the gauge reads upto 1.3 bar but im not sure i think the turbo is standard so do i just have it remaped what bhp could i get with stock turbo with this setup ? or do i go for a bigger turbo and remap would it make 400 hp with all the mods also would the gearbox handle 400 hp thanks for the advice oh im not sure the car would run with all the mods and no remap ?

[DocJock]

Some of the mapping guys like ScoobieWRX, Vixpy or JollyGreenMonster will be able to advise you on tuning limits for your set-up, but your not going to get near 400. 1.3 bar is higher than standard.

Standard gearset is good for 350ish lbft after that you'd be better looking at a later version

[Vixpy1]

If its got 550's and is on the standard ecu it would run like a bag of st. Since the standard ecu cannot be remapped it must have a power fc, simtek or esl board in.

With a bigger blower you can make your 400, but 3rd gear may well fall off.

[ScoobieWRX]

Without a remap not only is your current setup going to be running very rich but you car will generally be running like a bag of ste as you have intimated in your post already. For your std TD05 to be making 1.3bar it's likely your ECU is chipped. Get it remapped properly!!

With a remap and the standard turbo, based on your current mods you should make 350bhp/similar torque without a problem and it will be nicely quick at that from low down. It depends really on what you have planned for the car.

Add an adjustable fuel pressure regulator plus an 18g and you're looking at 370-380. Go for a 20G and you should be knocking on the door of 400bhp.

Your weakpoint though is the gearbox. A classic 5spd is made of chocolate and as such you will be going through gearboxes at muich more than 320bhp. Either have your 5spd built up with a PPG Gearset/Synchro (gears 1-4 should do leaving 5th as std) or do a 6spd conversion.

With your current suspension and brake mods you it looks like your car probably goes round corners well and stops properly too. Might be worth getting it all set up properly for fast road.

However, a remap is no problem and should be your next port of call.

[Vixpy1]

The later classic gearboxes are ok at 400 on a 2L, however on a 2.5 the extra torque tends to break them, also on a TDO5 I would be very thankfull to get 320bhp on a wrx. Some do do more though