kevfawcett

iTrader: (7)

Hello all,

I recently bought my first Impreza and I'm trying to find out as much as I can about it, mainly the engine. I've tried using the search function but didn't get what I was after, although i'm sure this will have been covered before.

I'd appreciate it if somebody could point me in the right direction to find out as many details as possible. However, I'll start with an easy one

It's a 53 plate STi Type UK with 6speed box with no DCCD

What is the maximum power these engines and gearboxes are normally good for?

Cheers

Kev

newbee

iTrader: (8)

approx 400bhp is about what they say you can safelyish (if there is such a thing) achieve anything over you start talking forged internals and big money think i heard £300 for evey 1bhp over 400 but dont quote me on that

jd5217

mine has been running at 450bhp / 400lbft for approx 4 years now.

There are others running over 500bhp.

kevfawcett

iTrader: (7)

On standard internals???

jd5217

yep

TonyBurns

iTrader: (3)

Its a bit hit n miss, when you get to the 400+ zone (normally 450bhp) you can start getting issues, some have run over 500+bhp quite happily and some have decided to implode (or explode a piston through the block).
400-420bhp is a nice safe figure to aim for if you want to go that way, though it will cost you more due to bigger injectors, fuel pump, brake upgrade (min disc and pads), maybe a fmic though you can run the tmic, turbo (most of the good new ones are in excess of 1k), re map, exhaust, caik, increase in insurance etc.

Tony

kevfawcett

iTrader: (7)

Thanks for the replies boys, was looking at going for more power but just found out I may be losing my job in a couple of months

Hopefully i'll be fortunate enough to get another good one straight away

Kev