Audizine - An Automotive Enthusiast Community

Results 1 to 4 of 4
  1. #1
    Established Member Two Rings jeffreyk's Avatar
    Join Date
    May 26 2011
    AZ Member #
    76077
    Location
    British Columbia Canada

    Up sizing throttle body - Re tune?

    Guest-only advertisement. Register or Log In now!
    Hi,

    I hope the more technical people in the forum can help me out... I think I know the answer but I need to confirm...

    So I have an APR Ultracharger and dual pulleys installed on my car with the appropriate APR II+ tune.

    The throttle body is giving me grief and I need to replace it. See my other thread. https://www.audizine.com/forum/showt...-Throttle-Body

    If I swap my 80mm APR throttle body for a 'ported' or 'bored' 85mm throttled body, which flows more air per same amount of throttle position, would it required a re-tune?

    I think the answer is yes.

    My thinking is: The ECU should base the fuelling and timing and based on the throttle position right, manifold air pressure and temp? We don't have a MAF to tell the ECU air going in right?

    OR..... can the computer sort this out based on the O2 sensors? or other sensors?

    Who does custom tunes for things like this?


    Thanks

    Jeff
    2010 B8 S4 6 speed / ADS / APR Stage 2+ / H&R Sport / PS4S
    SOLD - 2000 B5 S4 6 speed / Black on Black & Grey Alacantra / K04 / VND Tune / ER SMIC / Stasis Tracksport / VMR 701 18x9.5 / Michelin PSS

  2. #2
    Established Member Two Rings BlueSteW8's Avatar
    Join Date
    Apr 24 2011
    AZ Member #
    74517
    Location
    Ft. Myers FL USA

    If I were in your position, I would try to get the car running right before trying a larger TB.
    That being said, I believe you shouldn't need a retune on the APR UC file.
    Is there an APR dealer close by?
    Maybe start there.

  3. #3
    Established Member Two Rings jeffreyk's Avatar
    Join Date
    May 26 2011
    AZ Member #
    76077
    Location
    British Columbia Canada

    Quote Originally Posted by BlueSteW8 View Post
    If I were in your position, I would try to get the car running right before trying a larger TB.
    That being said, I believe you shouldn't need a retune on the APR UC file.
    Is there an APR dealer close by?
    Maybe start there.
    Yes... probably wise words. I will make it run first.

    It’s always so tempting to ‘upgrade’ if at all possible. Lol.

    I contact APR and they asked me to double check the wiring harness. I will do that tonight.

    Jeff
    2010 B8 S4 6 speed / ADS / APR Stage 2+ / H&R Sport / PS4S
    SOLD - 2000 B5 S4 6 speed / Black on Black & Grey Alacantra / K04 / VND Tune / ER SMIC / Stasis Tracksport / VMR 701 18x9.5 / Michelin PSS

  4. #4
    Veteran Member Three Rings englishbay's Avatar
    Join Date
    Sep 30 2009
    AZ Member #
    48588
    Location
    Vancouver, Canada

    Does anyone know what's expected if you do swap the APR Ultracharger throttle body to a larger one? There are lots of threads on doing this but little on what the impact is with just this change alone will do.
    B8 A4 2.0T Quattro 6smt | Sport Package | APR S3/K04 | APR Turboback | Carbonio Intake | AWE FMIC | Eurocode HFIP | StaSIS Challenge Suspension | StaSIS High-Bias Torsen Differential | Eurocode Short Shifter | P3Cars Vent Gauge | Alu Kreuz | Snow Performance Water/Meth |



Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


    © 2001-2019 Audizine, Audizine.com, and Driverzines.com
    Audizine is an independently owned and operated automotive enthusiast community and news website.
    Audi and the Audi logo(s) are copyright/trademark Audi AG. Audizine is not endorsed by or affiliated with Audi AG.