• BimmerBoost member's experience with the Gintani E46 M3 Stage I + II S54 supercharger kit - Dynographs, pictures, and video

      Below you will find a writeup from BimmerBoost member ///CloudArch detailing his experience with the Gintani supercharger kit for the S54 inline-6 in his E46 M3 convertible. This is not some short term review but a detailed writeup of his two and a half plus years supercharged with over 30,000 miles on boost. He first supercharged the car when it had 78k miles on the clock and in that time period upgraded from the Stage I to the Stage II.

      Full details in @///cloudarch's words:

      I've been meaning to write a review of my E46 M3 Supercharger kit which has been the source of joy for over 2 years now. I figure this has been long over due and wanted to share what my experience has been. I hope this can serve as reference for E46 M3 owners exploring the FI route.

      I first visited the Gintani shop in Van Nuys, CA in early summer of 2011. I had completed my first mod on this car (Eisenmann Race Muffler) and was instantly hooked. I was looking to source a cold air intake kit and had been calling a few shops in the valley to see if anyone had experience installing these on E46 M3.

      The owner of one shop who works primarily with Porsche customers referred me to Gintani and suggested they would be able to help. I drove one day to Gintani's shop and discussed with them my interest in modifying my intake system in hopes of achieving an aggressive induction growl and possible gaining some extra horsepower. That's when I was introduced to FI and the Gintani kit which could yield massive amounts of power over my existing NA setup.

      I took a few visits to their shop to discuss my options and also get familiar with their staff. I also researched other S/C vendors and their kits during this time but I was really intrigued by the fact that there were very friendly to me from the get-go and the fact that they were local was a huge advantage. I travel about 80% of my time so considering the expense i was looking at and the risk that big power introduces, I knew that having someone in my backyard that I can turn to should problems arise was going to be a benefit I would struggle to have with anyone else.

      So I pulled the trigger on the Gintani Stage 1 Supercharger Kit in August 2011. My car had just over 78k miles then. The kit was installed shortly after including a custom tune with their in-house dynamometer (Dyno Dynamics) resulting in 386whp and 273 TQ. I have had a constant smile on my face driving my car with a lead foot ever since.

      The following is a summary of notable updates since then:

      1. October 2012, Upgraded to Stage 2 kit
      Mods included Fabspeed headers, smaller pulley, larger fuel injectors and a retune

      2. November 2012, participated in Airstrip Attack II
      My wife and I had an awesome experience at this great event organized by the Shift S3ctor crew. I was probably one of the slowest cars there but glad to have had an opportunity to take the car up to high speeds in a friendly controlled environment. We managed to hit 140mph at the 1/2 mile mark on our best run (not bad for a 3753lbs convertible plus two passengers ). My car was at 95k miles around this time.

      3. February 2013, Spark Plug maintenance
      Performed this work myself at 100k miles. Installed the same spark plugs which came with the S/C kit (NGK DCPR9EIX Iridium IX)

      4. March 2013, dyno day at Creations and Chrome in Santa Clarita, CA
      2 dyno runs on a DynoJet with best run resulting in 474whp and 326TQ. Setup included Fabspeed header, OEM Section 1, OEM Section 2, Eisenmann Race muffler. You can see in the power curve a bump just past 6500 RPM that I attribute exhaust flow restrictions.

      5. July 2013, Valve Adjustment and Exhaust modifications
      Had the guys at Racewerks Engineering perform a valve adjustment with new gaskets. Also installed used OEM Euro section 1, new Supersprint Resonated Section 2 and Supersprint Race muffler. The car now had 106k miles.

      6. January 2014, Shift S3ctor Dyno Shootout at European Auto Source
      I got wind of this dyno day hosted at EAS on Saturday 1/19/14 and took advantage of the opportunity to get my car dynod. I hadnt had the opportunity to dyno the car since the exhaust modifications back in July. I was ecstatic at the results from 3 dyno runs. Consistent power curve as you can see from the chart below. The drop at high RPM range seen with previous exhaust setup is no longer observed. The Supersprint mods have clearly delivered on their promise. Car is now at 112k miles.

      To conclude, I have to say that I am more than happy with this kit as it has delivered to every one of my expectations: reliability and consistency. After 2 1/2 years and over 30,000 miles of abuse, the kit is still running solid and putting down great power.

      I will eventually be looking to hitting the 600whp mark with a custom engine build. I have my first child on the way so who knows how realistic this goal is but at least I have something to dream about.

      Thanks for reading!

      This article was originally published in forum thread: My experience with reliable and consistent power started by ///CloudArch View original post
      Comments 8 Comments
      1. onisyndicate's Avatar
        onisyndicate -
        That is awesome! Nice review on Gintani and the longevity of the kit and all the mods you've had on the car. How often do you service the motor?
      1. cloudm3's Avatar
        cloudm3 -
        Click here to enlarge Originally Posted by onisyndicate Click here to enlarge
        That is awesome! Nice review on Gintani and the longevity of the kit and all the mods you've had on the car. How often do you service the motor?
        Thanks for the comments. I guess my engine gets maintenance pretty regularly. I am pretty paranoid and will take it in for maintenance at the slightest unfamiliar sounds from the engine bay.

        Just prior to the kit install,

        - Inspection II (55k miles)
        - Ignition coils replaced at (73k)
        - fan clutch assembly, coolant fan clutch and power steering hose replaced (76k miles)

        After kit maintenance:
        - vanos gear bolts and valve adjustment (83k miles). several vanos gear bolts had failed. luckily for me we caught this on time.

        Attachment 35737

        - engine belts, pulleys and tensioner replacement (97k miles)
        - belt tensioner (101k miles)
        - valve adjustment (106k miles)
      1. GG///M3's Avatar
        GG///M3 -
        Very nice setup.

        Hi 5
      1. Sticky's Avatar
        Sticky -
        Promoted to the front page.
      1. Flinchy's Avatar
        Flinchy -
        Nice review, and more solid numbers than i expected!

        would be interesting to see with a built head and cams and such if you ever plan on going there, given the NA numbers achieved Click here to enlarge
      1. Group.america's Avatar
        Group.america -
        600 whp E46 convertible in WHITE will be so sexy mate

      1. hifiguy@gaphix's Avatar
        hifiguy@gaphix -
        Great write-up man, the Supersprint setup really made a difference, props on the results!

        Sounds like someone's got a large excel file with all the mods/maintenance. Click here to enlarge
      1. Payam@BMS's Avatar
        Payam@BMS -
        Nice car brotha, I've seen you here and there a couple times lol. Seen you at the Shift sector event when I had my Cobalt SS, and I saw you at EAS dyno day 2 weeks ago. Really like the color combo, and your car must haul ass!!!