• Renntech C74 widebody W204 C63 AMG with prototype heads and cam upgrades runs 10.7@132.91

      A very impressive result for a naturally aspirated M156. This W204 C63 AMG features the Renntech C74 widebody kit. In addition the vehicle has prototype Renntech camshafts, Renntech ported cylinder heads, long tube headers, a prototype intake manifold, race exhaust, built transmission, limited slip diff, weight loss (unknown to what extent), and a Renntech race tune. This is a very strong result for a naturally aspirated M156 especially at PBIR (Palm Beach International Raceway). Video of the run is below and we expect this work in progress to get even faster.



      This article was originally published in forum thread: Renntech C63 with C74 body kit runs 10.7@132.91 started by Sticky View original post
      Comments 38 Comments
      1. Jacob502's Avatar
        Jacob502 -
        S5hit that was fast. Amazing. Just Amazing
      1. Jacob502's Avatar
        Jacob502 -
        When was this run taken place and what track?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Jacob502 Click here to enlarge
        When was this run taken place and what track?
        PBIR, so not a fast track by any means.

        May 24th is when it took place I believe.
      1. Jacob502's Avatar
        Jacob502 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        PBIR, so not a fast track by any means.

        May 24th is when it took place I believe.
        Imagine this car runing @ MIR on November

        I think it should easily put down 10.5. what ya think?
      1. Sticky's Avatar
        Sticky -
        Well yes, I agree.
      1. oldgixxer's Avatar
        oldgixxer -
        Mods:

        Renntech Cams
        Renntech Race Tune
        Renntech Ported Heads
        Renntech Long Tubes
        Renntech Intake Manifold
        Renntech Race Exhaust
        Weight Reduction
        LSD
        Drag Radials


        Thats gotta be $30-40k in mods...sweet jesus
      1. Dodger63's Avatar
        Dodger63 -
        Great run. Almost exact same 1/8 mph i had last time out on a 10.80 run
      1. LZH's Avatar
        LZH -
        Click here to enlarge Originally Posted by oldgixxer Click here to enlarge
        Mods:

        Renntech Cams
        Renntech Race Tune
        Renntech Ported Heads
        Renntech Long Tubes
        Renntech Intake Manifold
        Renntech Race Exhaust
        Weight Reduction
        LSD
        Drag Radials


        Thats gotta be $30-40k in mods...sweet jesus
        More probably....hard to justify that over a blower
      1. Exeenom's Avatar
        Exeenom -
        If you guys think this was a good run.... you haven't seen anything yet. This car is undergoing a transformation right now Click here to enlarge

        The RENNtech intake Manifold proved incredibly potent both on the dyno and on the track Click here to enlarge
      1. Even Money's Avatar
        Even Money -
        Is this intake available?
      1. oldgixxer's Avatar
        oldgixxer -
        Click here to enlarge Originally Posted by LZH Click here to enlarge
        More probably....hard to justify that over a blower
        Yes,that is exactly what I was thinking. I wonder how much 09/10' pre-owned C63's are selling for privately? Close to what those mods cost probably lol. Doesn't add up for me but Im sure the owner of that C63 is very happyClick here to enlarge
      1. Jacob502's Avatar
        Jacob502 -
        Click here to enlarge Originally Posted by Exeenom Click here to enlarge
        If you guys think this was a good run.... you haven't seen anything yet. This car is undergoing a transformation right now Click here to enlarge

        The RENNtech intake Manifold proved incredibly potent both on the dyno and on the track Click here to enlarge

        It would be excellent to have a low 10s NA C63. This Renntech car and propabley Dodger's will most likely make it happen
      1. SLS AMG's Avatar
        SLS AMG -
        pretty fast. Are these cams available yet?
      1. Sirex63's Avatar
        Sirex63 -
        Click here to enlarge Originally Posted by Jacob502 Click here to enlarge
        Imagine this car runing @ MIR on November

        I think it should easily put down 10.5. what ya think?
        I dont think that summer really kills an NA car that much.

        Talk about our cars lol !

        All of these mods and 10.8 only ? I wonder what weight reduction is it vs dodger's !
      1. Exeenom's Avatar
        Exeenom -
        Click here to enlarge Originally Posted by Even Money Click here to enlarge
        Is this intake available?
        The intake will be available very soon. It'll probably be orderable next week but there maybe a lead time for delivery.

        Click here to enlarge Originally Posted by SLS AMG Click here to enlarge
        pretty fast. Are these cams available yet?
        Yes, the cams are available.

        Click here to enlarge Originally Posted by oldgixxer Click here to enlarge
        Doesn't add up for me but Im sure the owner of that C63 is very happyClick here to enlarge
        This is RENNtech's own car.

        Click here to enlarge Originally Posted by Jacob502 Click here to enlarge
        Imagine this car runing @ MIR on November

        I think it should easily put down 10.5. what ya think?
        Agreed... 10.5 @ 134 mph is very possible Click here to enlarge

        Click here to enlarge Originally Posted by Sirex63 Click here to enlarge
        I dont think that summer really kills an NA car that much.
        Actually heat and (more specifically) humidity affect the entire 63 line-up very dramatically. The CLK63 BS is able to resist a little more due to the improved oil and trans cooling but it still gets affected. Cooling for the NA 63 models is just not really that great. Over the past 4 years there's been so much data comparing different tracks, temps, humidity, etc.... and they all showed an incredible difference between cool and dense air vs hot and humid conditions.
      1. Sirex63's Avatar
        Sirex63 -
        I didn't say that it doesn't affect it at all.

        I just wanted to deliver an info which is it affects a supercharged car more than being NA.

        Everything else you said is totally right.
      1. oldgixxer's Avatar
        oldgixxer -
        Click here to enlarge Originally Posted by Sirex63 Click here to enlarge

        I just wanted to deliver an info which is it affects a supercharged car more than being NA.
        No,it does not.
        Heat soak from an inadequate cooling system,does.
      1. Sirex63's Avatar
        Sirex63 -
        Click here to enlarge Originally Posted by oldgixxer Click here to enlarge
        No,it does not.
        Heat soak from an inadequate cooling system,does.
        Aha, then would the performance of the car running a supercharger @ 50F or 60F, be the same @ 125F ?
      1. fundahl's Avatar
        fundahl -
        What fueling was used for this? Nice run!
      1. oldgixxer's Avatar
        oldgixxer -
        Click here to enlarge Originally Posted by Sirex63 Click here to enlarge
        Aha, then would the performance of the car running a supercharger @ 50F or 60F, be the same @ 125F ?
        No. Obviously any engine whether it's NA or FI is going to run better in colder dense air. But,a NA car relies on atmospheric pressure to fill the cylinders&will see a much better gain in horsepower then a FI car in negative DA given the same parameters.
        A forced induction engine does not rely on atmospheric pressure as the power adder(turbo,S/C) is forcing the air inside. An FI car will not suffer anywhere near as much when the DA goes up. There is even a different correction factor for calculating corrected 1/4mi times for FI cars vs NA cars.
        Just ask any hardcore professional engine builder who races NA&FI cars if you think Im full of $#@!. Click here to enlarge