Gambit Posted September 25, 2015 Share Posted September 25, 2015 In std form they are 220bhp give or take and have boost atabout 0.9 bar. The boost profile in the std map is pretty tame and doesnt comein til 3500rpm assuming the car is std and starts to tail off from this lowlevel at around 4500rpm. 1. Keep the car std but just remap for more oomph and betterfuel economy. A full custom remap will bring boost in much earlier andhold higher boost levels for longer but the map will be geared to running muchmore efficiently ( which is also more economically) as it wont be possible topush too much boost with all 3 cats in place. Typically aGreen/K&N/Cosworth air filter and a backbox are fitted at this stage. This would get the car to about 250-260bhp 2. Sports cat in downpipe – remove centre cat A full custom remap will bring boost in much earlier due tothe lower back pressure and hold much higher boost levels. The remap will alsoaim to get it running much more efficiently ( which is also more economically). Typically a Green/K&N/Cosworth air filter is fitted at thisstage (on top of the sports cat downpipe and exhaust system). This would get the car to about 270bhp but a huge boost intorque figures in the mid range. 3. Fully Decat Exhaust A remap is needed to bring it under control and stopoverboosting. The remap will bring boost in as smooth as possible and mostlikely get full boost at around 2500 rpm and hold higher boost right throughthe rev range. The remap will also aim to get it running much more efficiently( which is also more economically). Typically a Green/K&N/Cosworth air filter is fitted atthis stage (on top of the decat downpipe and exhaust system). This would get the car to about 280-290bhp but a huge boostin torque figures in the mid range to around 360 lb/ft and transform the waythe car drives on the road. A real STi Killer this one !! A walbro 255 fuel pump is advisable but not 100% essential. 4. Getting to over 300bhp A lot of people want to do this, it is a nice bhp figure forthe pub afterall. So .. how ? The std TD04 turbo will not do it unless you areon a dyno that reads very optimistically. It is very easy to do on the 2.5 wrx with only a turbochange really needed to do it. The ideal is the VF43 off its bigger brother STiversion. There are many many choices of turbo for this VF30, VF34,VF35, VF43, VF48, TD05 16G, TD05 18G etc etc but all of these will need acouple of other changes to the car before hitting the mark safely. – Walbro 255 pump – the hawkeye WRX TMIC is very good so you wouldnt reallygain anything from upgrading to the STi TMIC. It is also advisable to change to NGK ILFR7H spark plugs. There is a lot of info around about the different turbos andwhat they are capable of – the VF43 from the hawkeye STi makes the best upgradein my opinion at the moment and should hit a nice safe 340-350bhp. The VF30makes a great upgrade too. This is pretty much an ideal level for the WRXkeeping it within the capabilities of the engine, gearbox and clutch. Some other info: – a vent to atmosphere dump valve will not improve theperformance but if you must fit one for the sound then stick to a good make –forge have always been good from what I have seen. (Baileys are less so) – an induction kit will most likely not improve performanceas the std airbox is very good. If you do want more induction noise then go fora cold air induction kit such as the K&N typhoon where the filter islocated away from engine bay heat. Anyway … hope that is useful. The information was provided by Duncan http://www.racedynamix.co.uk/ This information is provided as a guide and not to be used to argue who's the best mapper As we're a non biased club :) Mappers contact details for some reputable mappers: Racedynamix mobile : 07540 185754 email : duncan@racedynamix.com http://www.racedynamix.co.uk/remap/ Scoobyclinc Tel: 01246 590807 Email: info@scoobyclinic.com Nether Farm Stubbing Court Wingerworth Chesterfield S42 6QX http://www.scoobyclinic.com/ Area 52 Autosport Unit 2 Park Court Park Lane Business Park Kirkby-in-Ashfield Nottinghamshire NG17 9LE http://www.area52autosport.com/ Andy Forrest Performance CONTACT sales@andyforrestperformance.co.uk Payments via paypal@andyforrestperformance.co.uk Tel 01875 811811 AFP Harbour Garage Port Seton East Lothian EH32 0DS http://www.andyforre...co.uk/4436.html 1 Quote Link to comment Share on other sites More sharing options...
DavesDream Posted September 30, 2015 Share Posted September 30, 2015 Quick question: when you say improves engine efficiently, do you mean breathing and or fuel economy? Sorry, tech dummy! Sent from my HTC Desire 620 using Tapatalk Quote Link to comment Share on other sites More sharing options...
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