Subaru Impreza Forum - WRX STI Rally Performance Tuning - View Single Post

brumbrum · 04 Dec 2009, 06:58 PM

Hi Nigel and welcome to the site,
you have a TD04 turbo which is capable of (typically) 270 -280bhp, sometimes a little more(it's quite small, but very responsive). However, to get this you need to also make other modifications. The most simple and most widely agreed upgrades are as follows.........

Change of exhaust system (remove the CAT's so the engine can breathe/flow easier - or Sports cat system if needing to get through MOT emissions)
change the Panel air filter from paper to a cotton ('green' cotton is a prefered filter,,, not an oily one as this can cause issues)
upgrade your fuel pump to (255L)
you will then need to have software programmed onto your ECU - usually ECUTEK, this will open up your ecu to a ecu specialist 'mapper', and then the above mod's can be pulled together and utilized and then much more power can be extracted from your engine. This is the safest and most tried and tested way of doing things.

Andrew

04 Dec 2009, 06:58 PM	#2 (permalink)
brumbrum Dedicated Scooby Join Date: Oct 2004 Location: Cardiff Posts: 1,975	Re: Impreza turbo and remap ??? Hi Nigel and welcome to the site, you have a TD04 turbo which is capable of (typically) 270 -280bhp, sometimes a little more(it's quite small, but very responsive). However, to get this you need to also make other modifications. The most simple and most widely agreed upgrades are as follows......... Change of exhaust system (remove the CAT's so the engine can breathe/flow easier - or Sports cat system if needing to get through MOT emissions) change the Panel air filter from paper to a cotton ('green' cotton is a prefered filter,,, not an oily one as this can cause issues) upgrade your fuel pump to (255L) you will then need to have software programmed onto your ECU - usually ECUTEK, this will open up your ecu to a ecu specialist 'mapper', and then the above mod's can be pulled together and utilized and then much more power can be extracted from your engine. This is the safest and most tried and tested way of doing things. Andrew __________________ Interested in everything Last edited by brumbrum; 04 Dec 2009 at 07:00 PM.
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