Advice on MY05 WRX STi mods
 

Dear all, I am thinking of the below mods on an MY05 WRX STi

Would like to have your advice on the bst combinations:

1)Upgraded turbo?? which would be best suited for around 400hp
2)Front mount I/C or bigger top mount?? If yes which make is best?
3) Is an uprated fuel rail and bigger injectors necessary, if yes what size injectors??

Which of the below turbo's would be best suited??
APS SR40 turbo
APS SR55 Turbo
APS DR55 turbo

What about HKS Turbo's??

I am looking for the turbo that can give me best performance without needing to modify for installation.

I am looking at keeping the std internals and fitting a 3" exhaust with downpipes.

Thanks in advance! :)

TD05H-20G, induction, fuel pump, injectors, exhaust including manifold, ECU remap should get you near with lowish lag.

IC depends on your ambient temperatures and usage. FMIC may introduce more lag and airflow issues with the MAF sensor, TMIC may heatsoak, but also cool quite well, even OEM. But if you are going to thrash it at Vmax in 40C ambients think again?

Yes heat will be high

What kind of MAF problems do you get with a FMIC??

Cant do TD05-20G, its too expensive for me to import ex-UK, shipment is a killer.

What size injectors are we talking about here??

Oh and yes, I forgot to mention, i will be getting an ECUTek re-map :)

Dude, TD05's can be had in SA for not too much, Tim called me yesterday and he had one that he was handing in for some machining to allow for a 20G wheel.
AndyF on these forums supply some awesome TD05/06-20G turbo's - I want to get one of those.

Do the injector mod to the std injectors, that will give you 740cc.

Eish, and to see that you know more about scoobs than me now ;)

Remember who got you into the groove originally?? ;) ;)

*BTT*