greerwrx

iTrader: (1)

hi

just wanting to know, if the new 2.5 wrx engine can get over 300bhp and what it would take to do it.

also now that the wrx and sti both have a 2.5, is it the same engine just with the sti having different intercooler, injectors etc... or is it a different build.

cheers

TonyBurns

iTrader: (3)

To start with you will invalidate your warranty so think about that.
As for engines, the STi engine is completely different to the WRX engine, they may look the same but the are definately not the same.
As for 300bhp, yes there is a good probability that it is capable of getting towards those figures, note that other parts of the car may not be though.

Tony

john banks

Compression is slightly different from different combustion chamber/piston, and there are air pump channels in the WRX heads. These are really technicalities and as you point out the main difference is intercooler and turbo. So with turbo and intercooler swap with remap you should be able to breach 300 BHP very easily.

dynamix

iTrader: (3)

John - out of interest what do the air pump channels in the head do ? and why does the WRX have them and not the STI?

john banks

It is an emissions system for blowing fresh air into the exhaust manifold during cold start I believe.

greerwrx

iTrader: (1)

which turbo would be a good upgrade for the 2.5l wrx engine.

dynamix

iTrader: (3)

it really depends on what you want to use your car for and what your aims are.

I would say, comsider fitting the PPP kit as a first step as that wont kill your warranty or your insurance. Do a search on here for 2006 PPP and you will find a great thread with info on that.

GaryCat

A full sports cat exhaust system and remap will get about 290bhp & 310lbs/ft. For more than that you will need a bugger turbo, fuel pump, induction etc etc

scooby2.5maz

iTrader: (16)

just modded my 2,5 wrx and should be running around the 300 mark. just had full miltek decat, tdo5 (16g) and remap. all done at zen.

F1 CJE UK

iTrader: (8)

can you give me an idea of the total cost for the above mate, ball park will do thanks, sounds like I need to have a talk with Zen

scooby2.5maz

iTrader: (16)

no worries. tdo5 turbo was sourced off a member on here £350. the work at zen which included removing and fitting turbo all came to around £1300 or so plus vat.

F1 CJE UK

iTrader: (8)

ok thanks