• Centrifugal supercharger vs Turbo: Gintani E9X M3 S65 V8 twin turbo kit dyno results and comparison to the Gintani supercharger kit at the same 7.5 psi of boost

      Here is a good example of parasitic losses and the difference between a centrifugal supercharged power curve and a turbocharged power curve on the same motor. As many of you know Gintani is working hard on its E9X M3 S65 V8 stock DME tuned twin turbo kit and the kit is almost ready to be officially released. Many people will no doubt ask how the twin turbo kit compares to the supercharger kits and now you can see the difference for yourself.

      The turbo kit simply makes more torque and horsepower at the same 7.5 psi of boost. Not having to manually spin a compressor wheel and instead using exhaust gases definitely has its benefits. Those benefits being less parasitic drag on the motor and more torque down low and through the entire engine curve.

      Keep in mind these are 91 octane pump gas figures. Hitting over 600 wheel horsepower on 91 octane without meth injection on a supercharger kit just is not possible (despite a certain company making a claim early on that they did so at 7.5 psi through the stock exhaust system). As the dynograph obviously shows cracking 600 whp on 91 octane at 7.5 psi is something that the turbos can achieve on the S65 V8 and the supercharger can not:


      From 3200 RPM to 4500 RPM The Twin Turbo makes 60+ WHP more vs SC.
      From 4500 RPM to 7000 RPM The Twin Turbo makes 90+ WHP more vs SC.
      From 7000 RPM to 8300 RPM The Twin Turbo makes 50+ WHP more vs SC.
      From 3700 RPM to 4600 RPM The Twin Turbo makes 80+ WTQ more vs SC.
      From 5500 RPM to 6200 RPM The Twin Turbo makes 100+ WTQ more vs SC.
      From 6200 RPM to 7200 RPM The Twin Turbo makes 60+ WTQ more vs SC.
      From 7200 RPM to Redline The Twin Turbo makes 40+ WTQ more vs SC.


      From 3,000 rpm until redline the turbos make more torque. As BimmerBoost stated in impressions of the turbo kit, there is much better response down low and the dyno graph confirms the large torque difference. For those of you who do not like the throttle response or torque of the supercharger low in the rev range, the turbo kit is for you.

      The peak torque difference between the supercharger and turbos is 61 lb-ft of torque at the wheels. On 91 octane, at the same 7.5 psi of boost. That is a healthy difference and it also pays dividends in the peak power figure which shows the turbos with a 31 wheel horsepower advantage.

      More power and more torque through the curve with better throttle response. The turbo era of S65 V8 tuning looks very bright at this early stage. The next step will be seeing how a built motor responds to the turbos and BimmerBoost.com gladly will voluneteer its own built motor M3 to find out. This is excellent work from Gintani who is now clearly separating themselves from the other tuners on the platform.

      Twin turbo 7.5 psi STD correction:


      Twin turbo 7.5 psi SAE correction:



      This article was originally published in forum thread: Gintani Twin Turbo E9X M3 Dyno Graphs and Video started by Sales@Gintani.com View original post
      Comments 153 Comments
      1. richpike's Avatar
        richpike -


        -Rich
      1. G0TB00ST?'s Avatar
        G0TB00ST? -
        What kind of turbos?
      1. 135pats's Avatar
        135pats -
        It's great that you guys are retaining the factory DME. Well done
      1. crypticc's Avatar
        crypticc -
        Thinking this topic will get hot, Is it an idea to use this thread for off topic chat about this setup and the new thread for technical updates?

        Can put links in op of each to redirect. @Sticky please delete if you disagree


        Technical update
        http://www.bimmerboost.com/showthrea...phs-and-Video/

        Related and Off topic chat for love and hating
        http://www.bimmerboost.com/showthrea...it-dyno-video/
      1. RNS-11Z's Avatar
        RNS-11Z -
        You guys should do a m156 TT kit
      1. Group.america's Avatar
        Group.america -
        7.5 psi and 600 whp = sick good
      1. Group.america's Avatar
        Group.america -
        91 crapola octane as, so race gas and this = 660 whp 450-480 talk
      1. bobS's Avatar
        bobS -
        Awesome... The e9x m3 is such a sick platform and it's just beginning, well done gintani Click here to enlarge
      1. Irishace's Avatar
        Irishace -
        Unreal, excellent work guys!
      1. richpike's Avatar
        richpike -
        I can't quit thinking about this. This is the first time I've wanted to trade my 335 for an M3 (6,500ft ASL kills NA cars and I'm just not a SC fan). And now I *really* want to. Especially with E90 M3s in the $30s. This is killing me.

        Damn you Gintani! Damn you! Click here to enlarge

        -Rich
      1. bobS's Avatar
        bobS -
        Click here to enlarge Originally Posted by richpike Click here to enlarge
        I can't quit thinking about this. This is the first time I've wanted to trade my 335 for an M3 (6,500ft ASL kills NA cars and I'm just not a SC fan). And now I *really* want to. Especially with E90 M3s in the $30s. This is killing me.

        Damn you Gintani! Damn you! Click here to enlarge


        -Rich
        You only live once. Go for it, you'll kick yourself for not doing it sooner. Besides the tt gintani kit, the m is better in everyway...fit/finish, killer looks, 8000+redline, v8 sound, instant throttle response, the list goes on and on.. For 30k, what else even comes close?
      1. richpike's Avatar
        richpike -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        You only live once. Go for it, you'll kick yourself for not doing it sooner. Besides the tt gintani kit, the m is better in everyway...fit/finish, killer looks, 8000+redline, v8 sound, instant throttle response, the list goes on and on.. For 30k, what else even comes close?
        I've just added you to my "damn you" list. Click here to enlarge

        -Rich
      1. bobS's Avatar
        bobS -
        Haha you'll be more pissed at the resale of your 335 *ouch*. I was!
      1. richpike's Avatar
        richpike -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        Haha you'll be more pissed at the resale of your 335 *ouch*. I was!
        Click here to enlarge

        -Rich
      1. SSO95's Avatar
        SSO95 -
        hahaha I'm sorry stick but you got shafted by gintani so bad
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by G0TB00ST? Click here to enlarge
        What kind of turbos?
        Think they said 28s, weren't specific with the exact model though.

        Click here to enlarge Originally Posted by bobS Click here to enlarge
        Haha you'll be more pissed at the resale of your 335 *ouch*. I was!
        So true, so so upsetting
      1. fastgti69's Avatar
        fastgti69 -
        Good work to Gintani. What I noticed is that even when the car hits full boost, it's not like regular boosted cars. This graph is still very linear just like a SC setup, it doesn't have that huge mountain of power that just comes in super fast. Looks like it's not too bad to handle and even a great track car still.
      1. Linracing's Avatar
        Linracing -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        You only live once. Go for it, you'll kick yourself for not doing it sooner. Besides the tt gintani kit, the m is better in everyway...fit/finish, killer looks, 8000+redline, v8 sound, instant throttle response, the list goes on and on.. For 30k, what else even comes close?
        04 viper srt10, c63 and c6 z06 those murder the m3 by far!
      1. bobS's Avatar
        bobS -
        Click here to enlarge Originally Posted by Linracing Click here to enlarge
        04 viper srt10, c63 and c6 z06 those murder the m3 by far!
        I don't like the trans in the c63, hate the interior of the c6 and the viper is to far to the sports car side of impracticality for me. The m3 is well rounded, civil when you need it to be, mean when you want it to be....tough combo to beat IMO
      1. mjmarovi's Avatar
        mjmarovi -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        Good work to Gintani. What I noticed is that even when the car hits full boost, it's not like regular boosted cars. This graph is still very linear just like a SC setup, it doesn't have that huge mountain of power that just comes in super fast. Looks like it's not too bad to handle and even a great track car still.
        Common in larger motors running TT kits, they spool quicker. And it's only 7.5psi. Part of me wishes I would have waited for this, but I'm hoping the N54 won't need to be built for a consistent 700-750whp setup where as the S65 seems it absolutely needs to be...and that my friend is...$$$