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    • Another 10-second APR Ultracharged 3.0 TFSI V6 - Audiboost member breaks into the 10's with his B8.5 S5

      Congratulations to AudiBoost member @spool twice who broke into the 10's with his Audi B8.5 S5 joining a 10-second B8 S4 on the 3.0 TFSI platform. APR's tuning and ultracharger kit for the 3.0 TFSI supercharged V6 are helping make this possible. The details are below.


      Thought I'd share my best pass to date

      Run #1 10.930@127.39mph (1205-1507 ft D/A, 75*F)
      Run #2 10.961@127.13mph (1507-1695 ft D/A, 79*F)
      Run #2 11.002@126.85mph (1695 ft D/A, 82*F)

      Breakdown of my fastest run:
      60ft 1.600
      330ft 4.576
      1/8 ET 7.003
      1/8 MPH 101.46mph
      1000ft 9.106
      1/4 ET 10.930
      1/4 MPH 127.38mph

      Mods:
      APR ECU beta
      APR TCU
      APR Ultracharger
      e85/93 octane
      Autotech HPFP
      Walbro 255lph Lift-pump
      57.55mm s/c pulley
      Fluidampr 194mm crank pulley
      Tampa Autosports test-pipes
      Tampa Autosports ported blower
      Tampa Autosports ported UC adapter
      Killerchiller/AWE reservoir/PLM tank
      Modded OEM airbox (oem air filter)
      x-pipe/H-pipe (sound purposes only)

      255/35/19 Michelin Pilot Sport 4S (39/38psi front/rear),

      1/3 to 1/4 tank of gas
      no weight reduction
      ENE 13mph wind (almost tailwind)
      Launch between 2000-2250rpm.

      Launch method used: Engage LC sequence. Use the gas to modulate engine rpm between 2000-2,250rpm to "fool" the ECU/TCU into thinking LC is going to be used. Release brake, and quickly mashing the gas past kickdown. RPM's jump to about 2,500 - 2,750rpm at launch as the clutches catch. Full usage of 1st gear powerband while also maintaining AMAX upshifts.

      Track notes: I've been aching for a Saturday test-n-tune for a few months now. The reason is they have competitions starting at 1pm, so prep was spot on during test-n-tune earlier in the morning. IAT's started off around 29-30*C, ended around 57-60*C. I had a few ignition corrections up top in 3rd gear, however nothing significant (-1* range on 3 cyl), but it may have costed me just smidge in E.T. and MPH. Overall, I peaked boost at about 2436hPa @ 7,250rpm, but there is room to grow below peak for a meatier powerband, something that I plan on working over the summer either through porting the throttle body out to 85mm and removing the rear Tb blade (4mm), or stepping up to a 203mm crank sometime for that extra boost in the heart of the powerband.

      I basically have what's essentially stock downpipes/catback aside from the H-pipe/X-pipe. I could stand to upgrade my downpipes to a 2.5" version, it may free up a few ponies with the additional flow. As is, I'm impressed that the stock exhaust hasn't really been too much of an issue in terms of performance. My file is "beta" only to correct fuel trims/boost adjustments for my application, otherwise it's 100% the same as the production file


      CLICK ME FOR TIMESLIP

      This article was originally published in forum thread: Audi B8.5 S5 runs 10.930@127.38mph started by spool twice View original post
      Comments 5 Comments
      1. Sticky's Avatar
        Sticky -
        Adding the slip in:

        Click here to enlarge

        Could use a pic of the car for the article preview but that's ok we'll just go with the slip.

        Going to promote your post to the front page with an intro.
      1. spool twice's Avatar
        spool twice -
        I always liked this one Click here to enlarge Thanks again for the front page!

        **edit** not sure why attachment isn't appearing

        https://photos.app.goo.gl/qvLigjsRLEsOgtI93
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by spool twice Click here to enlarge
        **edit** not sure why attachment isn't appearing
        I see it...

        Well done. I'm guessing this is about it as far modding it goes?
      1. spool twice's Avatar
        spool twice -
        The OEM blower is likely near the limits as far as tuning wise on the 2.5 MAP sensor and also the available space for pulley's. You could in theory run beyond the MAP sensor, though blindly. The smallest that can fit on the snout currently is a 56mm pulley, and due to space constraints on the crank pulley side (due to other pulley's around that location), a 206mm is the largest.

        There is more that can be had under the boost curve before it peaks, so that's the area where I'm concentrating on next.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by spool twice Click here to enlarge
        There is more that can be had under the boost curve before it peaks, so that's the area where I'm concentrating on next.
        Why not just go to a bigger blower already?