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    • Roll on race video between a Weistec tuned P31 W204 C63 AMG and a P31 W204 C63 AMG with exhaust

      The P31 package offered as an option for the W204 C63 AMG is an excellent factory tuning package. AMG really outdid themselves and essentially squeezed out what aftermarket tuners are able to gain on the C63 AMG themselves. The package is more than just a tune however and for those unfamiliar it also includes stronger forged pistons, rods, and the crankshaft that see duty in the SLS AMG M159 V8.


      Mercedes-Benz claims power increases from 451 horsepower to 481 horsepower but in practice it seems to be even stronger than the MB claims. Just look at this race between a stock P31 C63 AMG versus a tuned standard C63 AMG with filters and a cat delete. Mercedes-Benz offers very aggressive factory software for the P31 cars.

      Due to how aggressive the stock software is many tuners struggle with improving upon the tune. The P31 tune is so good some (now somewhat defunct) tuners would flash the stock Mercedes P31 software onto C63's. What shows skill that separates tuners is things like getting extra power on P31 cars.

      Check out the race below between two P31 equipped C63 AMG's one of which is tuned by Weistec. The tuned car takes the P31 car significantly up top showing a horsepower difference. Keep in mind that the tuned car which pulls has the MCT transmission while the other P31 car (due to the option coming on the market before the MCT was featured in the C63) has the 7G transmission. It is definitely a factor but regardless horsepower wins this race.


      This article was originally published in forum thread: C63 Weistec tuned P31 Vs. P31 C63 With MidPipe + Xpipe started by SLS AMG View original post
      Comments 3 Comments
      1. Jacob502's Avatar
        Jacob502 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The P31 package is difficult to get additional power out of and although there are tuners who can, many can not. It's impressive to see P31 gains due to how aggressive the AMG tune is from the factory.

        +1. You are very correct

        you sure do know alot for someone who doesnt own an M156Click here to enlarge

        Weistec's naturally asspirated tune is very powerful. I have a friend with a 2012 C63 coupe running with supersprint headers and catless downpipes. It previoulsy had a moderate tune.I tuned his ECU with Weistec and the car is pulling really good, it dynoed 491whp.
        It was also beating the 2010 C63 running the same headers and an OE tune. it did 60-130 in 8.2 on a hot 37C day.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Jacob502 Click here to enlarge
        you sure do know alot for someone who doesnt own an M156
        I doubt anyone reads more automotive forum posts than I do.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Jacob502 Click here to enlarge
        Weistec's naturally asspirated tune is very powerful.
        I do not doubt it I'm trying to get a graph for their P31 tune. @Weistec