Close

Results 1 to 13 of 13
  1. #1
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    118,863
    Rep Points
    31,850.4
    Mentioned
    2092 Post(s)
    Rep Power
    319


    Yes Reputation No

    Audi's 4.0 TFSI Twin Turbo V8 showing its tuning potential - Already over 600 wheel horsepower tune only (APR)

    The German turbo V8 era sure is getting fun with Mercedes-Benz, BMW, Audi, and Porsche all going back and forth in a turbocharged V8 power war. Audi has the motor with the smallest displacement of the bunch but it is hardly giving up much of anything to its larger V8 competition. Proof? How about over 600 horsepower at the wheels with just a tune? APR was able to get exactly that with their Stage I ECU upgrade and 100 octane race fuel in the new S8 hitting 610 horsepower at all four wheels.

    We all saw last week that the Audi S8 is already in the 10's in the 1/4 mile tune only courtesy of APR. Below you have dynographs for the Audi S8 stock on 91 octane, Stage I on 91 octane, Stage I on 93 octane, and Stage I on 100 octane race fuel. The S8 puts down an impressive 485 all wheel horsepower completely stock on 91 octane showing it is slightly underrated to begin with.

    This all begs the question as to how the 4.0 TSFI V8 differs in various applications. This same basic V8 is used in the S6 and S7 tuned to 420 horsepower. In the S8 this output rises to 520 horsepower. In the RS6/RS7 this output rises to 560 horsepower. It is safe to assume the S8 has different turbos on the 4.0 than the S6/S7. Does the RS6 and RS7 then have different turbos than the S8? What exactly are the differences between the 4.0 TFSI in all the models it is used in at different horsepower levels? AudiBoost hopes to find out. What is certain is that this motor is capable of serious power with only mild modifications.

    Audi S8 Dynographs below.

    91 Octane:

    Click here to enlarge

    93 Octane:

    Click here to enlarge

    100 Octane:

    Click here to enlarge

    Performance Figures:

    Click here to enlarge

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  2. #2
    Join Date
    May 2012
    Posts
    284
    Rep Points
    290.7
    Mentioned
    1 Post(s)
    Rep Power
    3


    Yes Reputation No
    Beastly! I went to the JHB motor show last weekend and got to see an RS7 in person, damn, it's pretty!

  3. #3
    Join Date
    Sep 2012
    Posts
    1,118
    Rep Points
    962.9
    Mentioned
    14 Post(s)
    Rep Power
    10


    Yes Reputation No
    @Sticky wow very similar numbers to a tuned M157 and very similar power curves that show big torque down low and fade out a bit up. They also have the same low revving nature just barely going over 6K rpm. Really want to see what they can do with the 7000rpm in the s63tu

  4. #4
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    118,863
    Rep Points
    31,850.4
    Mentioned
    2092 Post(s)
    Rep Power
    319



    Yes Reputation No
    Click here to enlarge Originally Posted by ezec63 Click here to enlarge
    @Sticky wow very similar numbers to a tuned M157 and very similar power curves that show big torque down low and fade out a bit up. They also have the same low revving nature just barely going over 6K rpm. Really want to see what they can do with the 7000rpm in the s63tu
    It also has top mounted turbos...

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  5. #5
    Join Date
    Sep 2012
    Posts
    1,118
    Rep Points
    962.9
    Mentioned
    14 Post(s)
    Rep Power
    10


    Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    It also has top mounted turbos...
    The S63 tu or the 4.0 VW motor? These F/I v8 cars are ridiculous with basic mods would love to see this with intake and full exhaust/ catless down pipe

  6. #6
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    118,863
    Rep Points
    31,850.4
    Mentioned
    2092 Post(s)
    Rep Power
    319



    Yes Reputation No
    Click here to enlarge Originally Posted by ezec63 Click here to enlarge
    The S63 tu or the 4.0 VW motor? These F/I v8 cars are ridiculous with basic mods would love to see this with intake and full exhaust/ catless down pipe
    The VW motor.

    Click here to enlarge

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  7. #7
    Join Date
    Dec 2010
    Posts
    574
    Rep Points
    799.8
    Mentioned
    2 Post(s)
    Rep Power
    8


    Yes Reputation No
    @Sticky, any idea what turbos they use? Same question for the m157 & s63tu as well.

  8. #8
    Join Date
    Jul 2011
    Location
    Boston
    Posts
    78
    Rep Points
    67.0
    Mentioned
    0 Post(s)
    Rep Power
    0


    Yes Reputation No
    I have a friend with an S7 and he had APR flash it 2 weeks ago to a claimed 560 hp, it goes like he'll now that is for sure!
    2008 E93 Giac Stage 2, HPF IC, Injen Intake, Defective AR Design DP's with useless cats
    2014 X3 35i JB Stage 1

  9. #9
    Join Date
    Jan 2012
    Location
    NJ
    Posts
    976
    Rep Points
    1,406.3
    Mentioned
    31 Post(s)
    Rep Power
    15


    Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Gorgeous bay. I can't wait to see what APR may do with this engine, they can work some magic on that turbo set up.

    I need to start saving my pennies and switch over to Audi, I'll even settle for a S4 with DSG.

  10. #10
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    118,863
    Rep Points
    31,850.4
    Mentioned
    2092 Post(s)
    Rep Power
    319



    Yes Reputation No
    Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
    @Sticky, any idea what turbos they use? Same question for the m157 & s63tu as well.
    This is what I hope to learn.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  11. #11
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    118,863
    Rep Points
    31,850.4
    Mentioned
    2092 Post(s)
    Rep Power
    319



    Yes Reputation No
    Click here to enlarge Originally Posted by chrisisnapping Click here to enlarge
    Gorgeous bay. I can't wait to see what APR may do with this engine, they can work some magic on that turbo set up.

    I need to start saving my pennies and switch over to Audi, I'll even settle for a S4 with DSG.
    Having APR on your side for the twin turbo V8 is a damn good thing as they'll probably get a turbo upgrade working before anyone does for the BMW.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  12. #12
    Join Date
    Jan 2012
    Location
    NJ
    Posts
    976
    Rep Points
    1,406.3
    Mentioned
    31 Post(s)
    Rep Power
    15


    Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Having APR on your side for the twin turbo V8 is a damn good thing as they'll probably get a turbo upgrade working before anyone does for the BMW.
    the perks of being a Large international company with the top tools and engineers. APR is just on another level, it's a shame they don't put too much effort into the R8 or Porsches.

  13. #13
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    118,863
    Rep Points
    31,850.4
    Mentioned
    2092 Post(s)
    Rep Power
    319



    Yes Reputation No
    Click here to enlarge Originally Posted by chrisisnapping Click here to enlarge
    the perks of being a Large international company with the top tools and engineers. APR is just on another level, it's a shame they don't put too much effort into the R8 or Porsches.
    Their supercharger is coming for the R8 but I think it's a good thing they maintain a strict focus.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

Tags for this Thread

Bookmarks

Posting Permissions

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