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    • Independent APR 3.0 TFSI B8 S4 tune results - gains of 64 all wheel horsepower

      This is the type of thing we like to see. APR has posted their own graphs but they tend to do them in crank horsepower which is, well, pretty annoying. A customer took his car for before and after dyno pulls on a Mustang and went from 297 awhp to 361 awhp with tune only. Impressive? Yes. The car in question is a 2011 Audi S4 with a custom Milltek exhaust and the APR 93 octane tune.


      Dyno Video:


      This article was originally published in forum thread: Independent APR 3.0 TFSI B8 S4 tune results - gains of 64 all wheel horsepower started by Sticky View original post
      Comments 13 Comments
      1. Sonny's Avatar
        Sonny -
        Great looking car. And I think the power gains look great, but isn't the AFR extremely lean?

        I'm not knowledgeable about Audis, although they seem like great cars. Perhaps, the engines are built to run very lean, although the stock AFR -- while probably very conservative from the factory -- does not seem that way.
      1. Sorena's Avatar
        Sorena -
        I'm Impressed by the baseline, 297whp is pretty good for a AWD car.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        I'm Impressed by the baseline, 297whp is pretty good for a AWD car.
        The new forced imduction Audi's are putting up much better numbers.
      1. Sonny's Avatar
        Sonny -
        @Sticky,

        Do you have any insight into my question about AFR above?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sonny Click here to enlarge
        @Sticky,

        Do you have any insight into my question about AFR above?
        Well, I would like to see a slightly better graph but yes it does appear to be a bit lean although it seems to be mostly at redline which could be somewhat of a spike. The thing is with DI you can get away with being a bit lean more than you can with port injection. So is it an aggressive tune? Certainly appears to be.
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Well, I would like to see a slightly better graph but yes it does appear to be a bit lean although it seems to be mostly at redline which could be somewhat of a spike. The thing is with DI you can get away with being a bit lean more than you can with port injection. So is it an aggressive tune? Certainly appears to be.
        Ahh, yes, DI vs PI. Very good point.
      1. BoostAddict's Avatar
        BoostAddict -
        Remember that if the sniffer is placed after the cats it is going to read leaner.

        Oh, and that's the shop that built my 350Z haha small world.
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Sonny Click here to enlarge
        @Sticky,

        Do you have any insight into my question about AFR above?
        On my Gti with the APR tune It looked the same with the AFR. Lean near the redline..

        Click here to enlarge


        Those are some great numbers for just a tune! you can make that thing pretty quick!
      1. BoostAddict's Avatar
        BoostAddict -


        Just for comparison on the same dyno, FBO no meth 335i. JB3 map 7 iirc. B8 S4 is no joke. My buddy just got one, and are plan was to battle to the death lol, but now I'm a little worried.
      1. Sticky's Avatar
        Sticky -
        ^ It will be a good race.

        Please get it on vid, AudiBoost vs. BimmerBoost will be badass.
      1. MHP LLC's Avatar
        MHP LLC -
        Even with DI they are over 13.0:1 at WOT across the board post tuning. That is VERY aggressive for a PD blower or any kind of FI. Now imagine the car on the road with real world airflow and watch the A/Fs go .3 to .5 leaner.

        FWIW, I would never market a tune that lean, not even close. Solid gains but too risky for me.
      1. prodigymb's Avatar
        prodigymb -
        thats good power especially on a mustang. saw one of those S4s go 12.2 with just a tune...
      1. BoostAddict's Avatar
        BoostAddict -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        ^ It will be a good race.

        Please get it on vid, AudiBoost vs. BimmerBoost will be badass.
        I will. My buddy has a gopro so hopefully we can get some decent footage. We plan to go stock for stock first. Both cars are 6speed manuals.