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Typical Upgrade Path - Newage 2.0 STi

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  • Typical Upgrade Path - Newage 2.0 STi

    Again, a common question that I get asked about what should be done and what shouldn't etc so I will aim to do these for each significant model type.

    2.0 litre STi from 2001 - 2005 ....

    In std form they are 265bhp give or take and have boost at about 1.2 bar but this varies according to model. The boost profile in the std map is pretty tame and doesnt come in til 3500rpm assuming the car is std.

    so... choices .. (all based on using vpower)

    1. Keep the car std but just remap for more oomph and better fuel economy.
    A full custom remap will bring boost in much earlier and hold higher boost levels for longer but the map will be geared to running much more efficiently ( which is also more economically) as it wont be possible to push too much boost with both cats in place. Typically a Green/K&N/Cosworth air filter and a backbox are fitted at this stage.

    With a simple remap on the standard car typically this would get the car to about 290bhp (blob eyes may make slightly more)

    2. Sports cat in downpipe - remove centre cat
    A full custom remap will bring boost in much earlier due to the lower back pressure and hold much higher boost levels. 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 at this stage (on top of the sports cat downpipe and exhaust system). A walbro 255 fuel pump is essential.

    It is also advisable to change to NGK PFR7B spark plugs.

    This would get the car to about 320-340bhp but a huge boost in torque figures in the mid range.

    3. Fully Decat Exhaust
    The low back pressure from removing all the cats reveals the true characteristics of the boxer engine. A remap is needed to bring it under control and stop overboosting. The remap will bring boost in as smooth as possible and most likely get full (and higher ) boost at around 3300 rpm (depending on turbo surge point) and hold higher boost right through the 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 and possibly a 3 port solenoid are fitted at this stage (on top of the decat downpipe and exhaust system).

    This would get the car to about 330-350bhp but I have seen them up to 365bhp on the std turbo but a huge boost in torque figures in the mid range and transform the way the car drives on the road.

    A walbro 255 fuel pump is essential.
    It is also advisable to change to NGK PFR7B spark plugs.

    4. 350bhp - 400bhp

    You may be one of the lucky ones and have a car that wants to produce power with the std turbo but if you want to gtee over 350 there are a number of turbo options and rather than list them all here - gimme a shout and see which of the many turbos around could fit your requirements. There are lots of suppliers of turbos and they are changing all the time.

    The car's engine and gearbox can cope with this power well.

    5. Getting to over 400bhp

    The std STi engine has been proven to up to 450bhp but it can be an expensive step going from 350 to 450 so again get lots of advice beforehand and decide whether you really want to chase the big numbers as it becomes a diminishing return for the money outlayed.

    Some other info:
    - a vent to atmosphere dump valve will not improve the performance 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)
    - a FMIC is not needed at this stage but can be a good improvement on the STi tmic when above 350 - the sti tmic can support up to 400 ish bhp though for road use.
    - an induction kit will most likely not improve performance as the std airbox is very good. If you do want more induction noise then go for a cold air induction kit such as the K&N typhoon where the filter is located away from engine bay heat. It may be that the time you 'need' to change to an induction kit then a FMIC may be being fitted so it would need to be one that works well with your chosen fmic.

    Anyway ... hope that is useful.
    Duncan Graham
    email: duncan@racedynamix.com
    tel: 07540 185754
    Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
    Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK


  • #2
    Re: Typical Upgrade Path - Newage 2.0 STi

    A good thread Duncan i will be keeping a close look at this one.

    Comment


    • #3
      Re: Typical Upgrade Path - Newage 2.0 STi

      Yours is a wrx

      Already done the WRX one a while back and your mods are on there
      Duncan Graham
      email: duncan@racedynamix.com
      tel: 07540 185754
      Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
      Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK

      Comment


      • #4
        Re: Typical Upgrade Path - Newage 2.0 STi

        you should make this thread a "sticky" m8
        sigpic

        Comment


        • #5
          Re: Typical Upgrade Path - Newage 2.0 STi

          2.5 sti next? please
          395 LBft @ the wheels

          Comment


          • #6
            Re: Typical Upgrade Path - Newage 2.0 STi

            That one is easy
            Duncan Graham
            email: duncan@racedynamix.com
            tel: 07540 185754
            Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
            Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK

            Comment


            • #7
              Re: Typical Upgrade Path - Newage 2.0 STi

              Done
              Duncan Graham
              email: duncan@racedynamix.com
              tel: 07540 185754
              Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
              Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK

              Comment


              • #8
                Re: Typical Upgrade Path - Newage 2.0 STi

                looks like no 2 will be my route when i get some overtime back

                Comment


                • #9
                  Re: Typical Upgrade Path - Newage 2.0 STi

                  2.5 Legacy Engine - Non Turbo flat four

                  If theres anything I can do other than Turbo it !! please do let me know

                  Comment


                  • #10
                    Re: Typical Upgrade Path - Newage 2.0 STi

                    Yeah -take it out and put an impreza engine in
                    Duncan Graham
                    email: duncan@racedynamix.com
                    tel: 07540 185754
                    Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
                    Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK

                    Comment


                    • #11
                      Re: Typical Upgrade Path - Newage 2.0 STi

                      Lol that kinda defeats the object of running a 2.5 Legacy lump, Must be other routes I can go down

                      Comment


                      • #12
                        Re: Typical Upgrade Path - Newage 2.0 STi

                        standard air in air out enhancements and tuning for ignition and fuel.

                        Can make good gains but not quite up there with turning the boost up
                        Duncan Graham
                        email: duncan@racedynamix.com
                        tel: 07540 185754
                        Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
                        Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK

                        Comment


                        • #13
                          Re: Typical Upgrade Path - Newage 2.0 STi

                          Already Running a K&N Induction 57i Kit

                          Was thinking upgrading to a Apexi unit
                          Fitting Helix Clutch Kit

                          Would it be worthwhile me fitting a faster flow fuel pump ( walbro ) and bigger injectors ? or is this not going to make any difference to the output levels on the 2.5 block, obviously dont want to push it to hard and it goes bang.

                          Im currently running on a 2 litre Ecu
                          & 2 Litre Diff

                          Wondering if my current B3 Ecu can be mapped to improve on the running or whether id be better off trying to get the 2.5 Ecu fitted.

                          Also running sportcats 3 inch pipe into straight thru system with 5 inch rear silencer

                          Its very loud, responds well but It would be nice to have that little more

                          Cheers in advance

                          Pete

                          Comment


                          • #14
                            Re: Typical Upgrade Path - Newage 2.0 STi

                            Changing injectors wont do anything unless your current injectors cant supply enough fuel. Same goes with pump.

                            Get it on the dyno to get a baseline power figure and get it back there after each set of mods to see if you have made it better or not.
                            Duncan Graham
                            email: duncan@racedynamix.com
                            tel: 07540 185754
                            Custom Mobile Remaps for: All Impreza/Forester 2001-2012 | Classics 92-98 ESL | Ecutek 1999/2000 onwards inc RaceRom| Syvecs (Solaris) | Simtek
                            Nationwide Road Mapping and Dyno mapping around various dyno centres in the UK

                            Comment


                            • #15
                              Re: Typical Upgrade Path - Newage 2.0 STi

                              Planning a trip down to clives shortly

                              Cheers for the advice

                              Comment

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