What is taken in terms of engine work and money in order to take any Impreza up to 400BHP?

In terms of Cosworths u can make it with a T35, low comps, larger intercooler, uprated box/clutch, cams, bigger injectors with a mapped chip.

So what r we talkin with a Scooby? Is there a BHP limit or reliablibilty issue above a certain BHP? What about engine managment etc? My reason for asking is that u rarly hear of such highly powere Imprezas but many Cosworth owners have modded to this level.

Im new to anything Impreza related and am jus interested, Thanx.

I think that www.tdi-plc.com can help you with that. They claimed smth around 600hp at the crank for my friend's Scoob. However, I don't believe that, but definetely over 400.

Is this kind of a taboo subject Scooby owners prefer to ignore?

Try talking 500 :p

Harvey Smith STi6 Wagon (Roger Clarke open deck engine with uprated internals, K&N custom induction, Ion Turbo, APS FMIC, 6 port boost solenoid (BRD experimental), uprated fuel pump, Link ECU, 740cc injectors, 4-1 tubular headers, lightened flywheel, Revolution 3" exhaust with ceramic coated DP, MRT induction hose ) 533bhp@ 6923 419lbsft@ 6300

Cool, how much does all that cost u though including new g/box etc? Why don't more people do that? Is it relativly reliable? Thanx

Im over 400bhp..
I dont have a dyno print out yet.. Im doing some miles first as people care about reliability these days :rolleyes:

Cost??

circa 10 - 20k if you assume brakes suspension fuel pump, injectors ecu, turbo..

depends on how you achieve the 400 too..

ie an easy 400 or stressed 400.. a td05/06 hybrid turbo from andy or mark would provide that.. but pistons and rods might decide not to..

speak to www.lateralperformance.co.uk.. www.hdcsubaru.com, ,roger clarke, g-force, tsl, scoobymania, scoobysport, scoobyclinic, xtreme scoobys .. make some notes

and once youve done that decide a budget and which way you want to go and stick with it..