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    Renntech Stage 1 M157 tune in a 2012 CLS63 AMG runs 11.3@125

    Low 11's with just a tune in warm 85 degree Florida weather? That is what a CLS63 AMG (non-Performance Package) with the Stage 1 Renntech M157 tune just did. The Stage I tune raises boost from the stock 14.5 psi to about the exact same amount as the performance package, 18.8 psi. The vehicle was completely stock except for Nitto NT05 drag radials. Density altitude was just under 2000 feet which means in winter conditions we can realistically expect high 10's out of tune only M157 cars.

    This vehicle belonged to a customer so hard launches / launch control were not used as the 1.8 60 foot validates. This just the beginning of M157 performance tuning and things are off to quite a great beginning.

    Click here to enlarge


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    Yes... YES... YES!!! WOW! 11.3 tune only in FL DA with a 1.8 60'!!! Go RENNtech!! Sick times! Possible 10's with big neg DA with a TUNE only!! Throw on some skinny's with some 17's on the back and wow.... I dont want to bench race but damn... the potential is huge for this car.I have been flirting with getting this car for a while now and this just made it a whole lot easier for me. Anyone want to buy a C63? LOL

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    So, basically, a stock PP M157 CLS 63 has the potential to run very high tens in neg DA with a drag setup.So, the PP E63 will be stupid quick/fast.

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    Click here to enlarge Originally Posted by propain Click here to enlarge
    Yes... YES... YES!!! WOW! 11.3 tune only in FL DA with a 1.8 60'!!! Go RENNtech!! Sick times! Possible 10's with big neg DA with a TUNE only!! Throw on some skinny's with some 17's on the back and wow.... I dont want to bench race but damn... the potential is huge for this car.I have been flirting with getting this car for a while now and this just made it a whole lot easier for me. Anyone want to buy a C63? LOL
    Do it! Click here to enlarge

    Those cars are beautiful.

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    I just used the DA correction calculator on dragtimes and this is what it spit out:

    Extensively Modified Supercharged and Turbocharged Engines11.208 @ 126.025 MPH

    Obviously, the tune-only M157 is not "extensively modified" for the M157 platform. It may, however, be considered "heavily modified" (even though we're just talking a tune here) relative to other car platforms, when you look at the boost that it's pushing and the size/output of the engine.

    Again, it's not heavily modified, but traditionally, cars that put out this much hp/tq are heavily modified. It just happens that the M157 is a monster in stock form.

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    that's pretty scary to think what these cars will be running when someone decides to really mod them...10's in a big heavy 4 door sedan is just ridiculous.

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    Click here to enlarge Originally Posted by LZH Click here to enlarge
    that's pretty scary to think what these cars will be running when someone decides to really mod them...10's in a big heavy 4 door sedan is just ridiculous.
    Indeed.

    Imagine larger turbos, intercooler (if necessary... not sure about the efficiency of the stock IC), and meth injection on an aggressive map. Wow.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I just used the DA correction calculator on dragtimes and this is what it spit out:

    Extensively Modified Supercharged and Turbocharged Engines11.208 @ 126.025 MPH

    Obviously, the tune-only M157 is not "extensively modified" for the M157 platform. It may, however, be considered "heavily modified" (even though we're just talking a tune here) relative to other car platforms, when you look at the boost that it's pushing and the size/output of the engine.

    Again, it's not heavily modified, but traditionally, cars that put out this much hp/tq are heavily modified. It just happens that the M157 is a monster in stock form.
    And thats 0 DA. Calculate for -1200 DA and watch the magic happen. Of course it would correct up but you would still be in the 10's.
    Tune only 60-130: 8.57
    Tune only 1/4 mile record: 11.531 @ 122.12



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    Click here to enlarge Originally Posted by propain Click here to enlarge
    And thats 0 DA. Calculate for -1200 DA and watch the magic happen. Of course it would correct up but you would still be in the 10's.
    I just tried the "-1200" input and it wouldn't do it. The field says "feet about sea level," so maybe that's why... But, I thought there was a feature that could correct down.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    So, basically, a stock PP M157 CLS 63 has the potential to run very high tens in neg DA with a drag setup.So, the PP E63 will be stupid quick/fast.
    This will be slightly faster than a PP E63 as this tune is more aggressive than the PP tune. The E63 is a little lighter as well...

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    Indeed.

    Imagine larger turbos, intercooler (if necessary... not sure about the efficiency of the stock IC), and meth injection on an aggressive map. Wow.
    Just a good exhaust is going to be a nice upgrade...

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    This will be slightly faster than a PP E63 as this tune is more aggressive than the PP tune. The E63 is a little lighter as well...
    I don't know... If the boost on this tuned CLS is comparable to the PP cars and given the E63 is hundreds of pounds lighter, I don't think this tuned CLS will be faster than a PP E 63 with the same drag setup as this CLS (i.e., DR's). E 63 should be faster.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Just a good exhaust is going to be a nice upgrade...
    Depends. If you mean manifold-back, then yes, most likely, because you could remove the cats. But if you mean just a catback, then probably not because the E63's stock catback is probably very high flowing.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I don't know... If the boost on this tuned CLS is comparable to the PP cars and given the E63 is hundreds of pounds lighter, I don't think this tuned CLS will be faster than a PP E 63 with the same drag setup as this CLS (i.e., DR's). E 63 should be faster.
    If the cars have the same tune and setup the E will be faster due to its weight. The PP will be slower than a Stage I as Renntech as they already demonstrated they are gaining power on top of the PP.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    Depends. If you mean manifold-back, then yes, most likely, because you could remove the cats. But if you mean just a catback, then probably not because the E63's stock catback is probably very high flowing.
    I mean a full exhaust which is a great place to gain on turbo cars.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    If the cars have the same tune and setup the E will be faster due to its weight. The PP will be slower than a Stage I as Renntech already demonstrated they are gaining power on top of the PP.
    I understand. And that power gain must come from increasing timing if boost is the same. I don't know the power difference off hand between the PP and the RT stage 1 tune, but the power difference would have to be more than 50 hp/tq (just throwing out a number) to compensate for the difference of several hundred pounds in weight disparity.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I mean a full exhaust which is a great place to gain on turbo cars.
    Absolutely.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I understand. And that power gain must come from increasing timing if boost is the same. I don't know the power difference off hand between the PP and the RT stage 1 tune, but the power difference would have to be more than 50 hp/tq (just throwing out a number) to compensate for the difference of several hundred pounds in weight disparity.
    You can check it out here: http://www.benzboost.com/showthread.....3bar-18.85psi

    I was told it was not just from timing.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    You can check it out here: http://www.benzboost.com/showthread.....3bar-18.85psi

    I was told it was not just from timing.
    Well, what else could it be from?

    On a F/I car, when you're increasing power with just a tune, you can increase power with adjusting the AFR and/or boost. So, if boost is the roughly the same, a power increase would be due to timing.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    Well, what else could it be from?

    On a F/I car, when you're increasing power with just a tune, you can increase power with adjusting the AFR and/or boost. So, if boost is the roughly the same, a power increase would be due to timing.
    See post number 2 in that thread.

    I mentioned in the OP timing as that was the logical correlation and was told that was not the case. I am simply relaying what I was told.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    You can check it out here: http://www.benzboost.com/showthread.....3bar-18.85psi

    I was told it was not just from timing.
    This is a quote from your article that you linked:

    "This Renntech tune maintains just about the same maximum boost pressure so the gains seem to be coming from more boost down low as well as adjusting the timing."

    I'll still stick with my theory that a tune that increases hp by 20 and tq by 40 will not make up the difference of hundreds of pounds.

    Of course, the proof will be in the actual track times. So we'll see when more time passes and more people get their new cars to the track.

    That said, there are always variables and a RT stage 1 CLS can run quicker/faster than a PP E63, but if you compare the two cars in the same conditions (temp, DA, track prep, and drag setup (like tires), I believe the PP E63 will come out on top.

    Edit: I read your above post after I posted this post.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    This is a quote from your article that you linked:

    "This Renntech tune maintains just about the same maximum boost pressure so the gains seem to be coming from more boost down low as well as adjusting the timing."
    Yep, this is what I was referring to in the post above this one...

    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I'll still stick with my theory that a tune that increases hp by 20 and tq by 40 will not make up the difference of hundreds of pounds.
    Hundred pounds is roughly a tenth as is 10 whp. Guess there is only one way to find out? Point being that the Renntech tune is more aggressive than the factory tune anyway.

    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    Edit: I read your above post after I posted this post.
    That's fine.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    See post number 2 in that thread.

    I mentioned in the OP timing as that was the logical correlation and was told that was not the case. I am simply relaying what I was told.
    I just read the post you're referring to.

    Okay, so here's where I'm coming from. Adjusting limiters doesn't make power, it allows the car to advance the timing and make the boost that is commanded for the programmed settings. Re-scaling the mapping, however, can adjust where the power is made on the power curves.

    But, when I'm making the comparisons that I'm making here, I'm referring to cars that are running under optimal conditions, hence the discussion of heavy sedans running high 10's.

    So, the PP E63 that I'm discussing is firing on all cylinders, so to speak. The stock limiters may not be as aggressive as the RT stage 1 settings, but I still maintain that the PP's power will be sufficient to propell the it, as the lighter car, down the track quicker/faster than the RT stage 1 CLS 63.

    The PP E63's tune also can likely adapt up if it recognizes higher octane. Granted, the power that it can ultimately make will be 20 hp/40 tq less than the RT stage 1 car, but stock limiters on the PP car won't be a hinderance for that car given optimal conditions, so the more aggressive limiters in the RT car will merely allow it to make the 20 hp/ 40 tq extra power, which still shouldn't be enough to compensate for the extra weight.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Hundred pounds is roughly a tenth as is 10 whp. Guess there is only one way to find out? Point being that the Renntech tune is more aggressive than the factory tune anyway.
    I'm aware of the 100 lbs/ 10 whp = tenth theory. I tend to think the weight reduction equals more than increase in hp when you're talking about 10 whp increases.

    I'm sorry, but I'll never believe that an increase in 30 whp can net the same gains and dropping 300 lbs. Granted, I have no scientific data to back up my belief. But, it is what it is.

    I'm happy that the RT stage 1 tune is killing it on the track. Should be awesome when we see an E63 with those same power figures.

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    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I'm aware of the 100 lbs/ 10 whp = tenth theory. I tend to think the weight reduction equals more than increase in hp when you're talking about 10 whp increases.
    I think it is just a rough estimate and an argument can be made either way.

    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I'm sorry, but I'll never believe that an increase in 30 whp can net the same gains and dropping 300 lbs. Granted, I have no scientific data to back up my belief. But, it is what it is.
    In trap or ET? Because that depends as well.

    Click here to enlarge Originally Posted by Sonny Click here to enlarge
    I'm happy that the RT stage 1 tune is killing it on the track. Should be awesome when we see an E63 with those same power figures.
    Looking forward to it. Wish they would drop it in an even lighter car...

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