Hi I have a 94 impreza wrx the mods are a td05 16g, 440cc injectors, walbro fuel pump, decat, forge 1 bar actuator, simtek ecu with anti lag and launch control. What sort of bhp should that be running? When I had it mapped it's was 266 which I though seemed pretty low considering the mods.

 

I would have thought closer to 290 but your slanty intercooler is quiet restrictive I believe.

 

That is what the mapper said so I have now bought a fmic, k&n induction kit ( which is a nightmare to fit) and a 3 bar map sensor, he said that should take it to 320 and if I want any more power I will have to uprate my turbo

 

sound about right

 

Sorted thanks mate btw do you no whats the best turbo to go for? If I do decide to upgrade it because I'm sure it won't take me long to get bored of 320 bhp

 

320 in a classic is going to be a quick car,but there are plenty of 400+ turbos out there,just have a search around the forum,loads of threads on this kind of thing.
The standard gearbox on your car will also be a limiting factor when pushing over 350,saying that there are people who say they have and do run more.

I run an SC42 twin scroll but also had a 6 speed conversion.

 

Mine hit 330 bhp then. Then I had my engine rebuilt. Bigger injectors and then my Td05 16g top entry turbo made 354bhp

 

My car is making 317 with similar torque on a front entry TD05, 440's and front mount. That's on a recently forged build with STI V3 heads. It's also been decatted, walbro pump, Harvey up pipe, new age coil packs and lightly ported headers etc etc.
It spools up lovely. I'm considering bigger turbo and injectors but I don't want to sacrifice the spool, it pulls like a train. It made 317 then we suspected the standard coil packs were breaking down and stopped the session.