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    • Heffner stock internal Audi R8 V10 twin turbo kit - 725 all wheel hoserpower at 6 psi

      Heffer Performance is wrapping up their R8 V10 twin turbo kit. The car produces 725 whp on pump gas at only 6 psi on the stock internals. This is up over 225 whp from stock. No word yet on the cost of the setup but the but the V8 kit for the stock internals was around $25k last time we checked. This will be a bit more than that.


















      This article was originally published in forum thread: Heffner stock internal Audi R8 V10 twin turbo kit - 725 all wheel hoserpower at 6 psi started by Sticky View original post
      Comments 13 Comments
      1. oddjob2021's Avatar
        oddjob2021 -
        it sure is beautiful, you say only 6psi, but look how massive the hairdryers are Click here to enlarge 6psi out of those puppies is like 25psi or more on td03-10T's (335 turbos). no doubt the engine calls for it, as the displacement is almost double that of a 335, but its great to see more potential on this platform than the r8 v8. i cant wait to see what else heffner has in store, hopefully some stage 3 option with a built block and say 15 pounds? the turbos look like t3/t4's no? the compressor housing looks to be a size up from the turbine housing. i would figure 5+ liters and 8k+ revs would produce more exhaust gas than two t3's, but i could be way wrong, and the scale of the picture may be misleading.
      1. SSDD's Avatar
        SSDD -
        Yeah the volume of air those suckers are pushing looks quite large. I love the look of turbo kits on rear engine cars. It's just so elegantly straightforward.
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge just sick !
        but sad to see the magic engine response of that engine will be gone.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
        it sure is beautiful, you say only 6psi, but look how massive the hairdryers are Click here to enlarge 6psi out of those puppies is like 25psi or more on td03-10T's (335 turbos). no doubt the engine calls for it, as the displacement is almost double that of a 335, but its great to see more potential on this platform than the r8 v8. i cant wait to see what else heffner has in store, hopefully some stage 3 option with a built block and say 15 pounds? the turbos look like t3/t4's no? the compressor housing looks to be a size up from the turbine housing. i would figure 5+ liters and 8k+ revs would produce more exhaust gas than two t3's, but i could be way wrong, and the scale of the picture may be misleading.
        This is just the very mild, easy stage. 6 psi on high compression is plenty of power for the stock internals.

        I think this is my next car.
      1. DBFIU's Avatar
        DBFIU -
        Amazing, look at the engineering that went into this kit. This is what you pay for, not Julio down the street MIG welding $#@! together.
      1. blkclk550's Avatar
        blkclk550 -
        FAP FAP FAP FAP FAP FAP
      1. spdu4ea's Avatar
        spdu4ea -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Click here to enlarge
        Looks like they made some minor changes to the wastegate routing since the prototype:

        Click here to enlarge
      1. Yukohama's Avatar
        Yukohama -
        how is the turbo lag on these things? and very respectable numbers
      1. MSIZZLE's Avatar
        MSIZZLE -
        throttle response wouldnt really change, the car doesn't make any less power at any rpm than before, the power that it will make while on boost vs off boost will create that feeling of lag but that is only lag to the new power
      1. Yukohama's Avatar
        Yukohama -
        Click here to enlarge Originally Posted by MSIZZLE Click here to enlarge
        throttle response wouldnt really change, the car doesn't make any less power at any rpm than before, the power that it will make while on boost vs off boost will create that feeling of lag but that is only lag to the new power
        ahh i see, so it's sorta just the feeling that u make less power down low now
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by spdu4ea Click here to enlarge
        Looks like they made some minor changes to the wastegate routing since the prototype:

        http://www.bimmerboost.com/images/im..._8270JPG-1.jpg
        You sure that isn't the V8 kit?
      1. Sorena's Avatar
        Sorena -
        ^ that's V8
      1. spdu4ea's Avatar
        spdu4ea -
        good eye