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    • Video of MRC Tuning's Garrett GTX4508R single turbo R8 4.2 with 750+ horsepower hitting 204.4 miles per hour

      Those reading this site likely already know there are several turbo kit options out there for R8 4.2 V8's. MRC Tuning's option differs from what is on the market as instead of a twin setup they use a single Garrett GTX4508R turbocharger. A video showing the R8 running to speed was already posted back in July but this new video shows far more of the R8 in action with more details. The shot showing how the turbo is piped and routed being especially impressive.

      Watch the very well edited video below.




      This article was originally published in forum thread: Video of MRC Tuning's Garrett GTX4508R single turbo R8 4.2 with 750+ horsepower hitting 204.4 miles per hour started by Sticky View original post
      Comments 12 Comments
      1. SSO95's Avatar
        SSO95 -
        Am I the only one missing the benefits of a big single on this motor?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bmwtek Click here to enlarge
        Am I the only one missing the benefits of a big single on this motor?
        Why would you not want a big single?
      1. SSO95's Avatar
        SSO95 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Why would you not want a big single?
        Wouldn't it make more sense to run 2 smaller turbos and have a broader power range rather than one laggier turbo on a relatively hi-revving v8.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bmwtek Click here to enlarge
        Wouldn't it make more sense to run 2 smaller turbos and have a broader power range rather than one laggier turbo on a relatively hi-revving v8.
        It's give or take either way. A single can be efficient too with less piping and all the gas going to one turbo. A large single can have more up top for example.

        It depends how you route and size.
      1. JoelMac000's Avatar
        JoelMac000 -
        Stock block or built? any one know?
      1. 1Zed4's Avatar
        1Zed4 -
        Click here to enlarge Originally Posted by JoelMac000 Click here to enlarge
        Stock block or built? any one know?
        I would imagine built, if its a reputable shop. still pretty cool
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JoelMac000 Click here to enlarge
        Stock block or built? any one know?
        This is still on the stock motor as I understand it.
      1. 1Zed4's Avatar
        1Zed4 -
        wow really? Wonder about dependability, i know forcing mroe air into the engine via turbos at that hp level is the most reliable but still. Very impressive!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 1Zed4 Click here to enlarge
        wow really? Wonder about dependability, i know forcing mroe air into the engine via turbos at that hp level is the most reliable but still. Very impressive!
        Well I think they are listing the horsepower at the crank. I don't think anyone has a solution for the fuel system issues on the 4.2 V8 yet.
      1. 1Zed4's Avatar
        1Zed4 -
        Not with the DI rs4 injectors in there, thats the biggest DI injector VW makes, flows 180 cc each. (just had mine cleaned and blueprinted)
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 1Zed4 Click here to enlarge
        Not with the DI rs4 injectors in there, thats the biggest DI injector VW makes, flows 180 cc each. (just had mine cleaned and blueprinted)
        You sure? http://www.audiboost.com/content.php...psi-and-50-whp
      1. 1Zed4's Avatar
        1Zed4 -
        yes, they'll flow the fuel if provided enough. thats been their main issue, excited to see future outcomes for sure!