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  1. #26
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    Click here to enlarge
    It's coming the RT E550 Coupe...The M278 engine platform it's more affordable to go fast; it just needs some suspension upgrades for handling, cooling upgrade & AMG63 brake size for stopping =)

  2. #27
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    Thanks!

  3. #28
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    Red face

    Click here to enlarge Originally Posted by m54b25 Click here to enlarge
    It's coming the RT E550 Coupe...The M278 engine platform it's more affordable to go fast; it just needs some suspension upgrades for handling, cooling upgrade & AMG63 brake size for stopping =)
    Any progress on this project?
    I believe MBZ increased the front brake size for 2012 e550c Which AMG63 brakes do you propose to use?
    Are you going to test more than one ECU tune?
    What about a LSD?

    Sorry for all the questions! I'm very interested in your project.
    Thanks!

  4. #29
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    Any progress on this project?
    I believe MBZ increased the front brake size for 2012 e550c Which AMG63 brakes do you propose to use?
    Are you going to test more than one ECU tune?
    What about a LSD?

    Sorry for all the questions! I'm very interested in your project.
    Thanks!
    Good questions.

    I would expect an LSD option relatively soon as it is definitely needed.

  5. #30
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Good questions.

    I would expect an LSD option relatively soon as it is definitely needed.
    The E550 Coupe blue efficiency it's an interesting platform. The newest RENNtech S/CL/CLS550 M278 tunes are making more torqueband & horse powerband than a stock non-performance CLS63 M157 (non posted graph/info yet); on the RENNtech E550 Coupe since it's a lower end variation class it's a possibility that some hardware (not software) are different that makes it's short of aprox. ~20whp on a dynojet stock compared to a S/CL/CLS550 M278. Even if the same RENNtech E550 tune vs. RENNtech CLS550 tune it's applied & tested... so it's valued or worth more for an upgrade hardware wise imho. We can expect hardware testing it's currently on the works for RENNtech to make it just as close/competitive to a E63 AMG performance package =)

  6. #31
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    I'm confused: Click here to enlargeMBZ rates the CLS550 at the same hp (402) as an E550C, but the S and CL are rated at approx 20hp more (429).

    Some tuners have implied that the M278 is the same in S,CL,CLS,E with possible exhaust differences.

    Regardless, thanks for the update. Looking forward to your updates.
    Due
    Last edited by Dueclaws; 02-17-2012 at 03:25 PM.

  7. #32
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    Congrats to RENNtech on their latest improvement to the M157 engine! Impressive platform with amazing upgrades.
    Will there be any other upgrades to the M278 RENNtech tune?

  8. #33
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    Will there be any other upgrades to the M278 RENNtech tune?
    Of course.
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  9. #34
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    This was posted on another site today. Can anyone from RENNtech verify what is shown here? Thanks
    Due

    "Renntech Tune For Cls550
    --------------------------------------------------------------------------------
    Just spoke to george at renntech and got some results for the Renntech ecu tune. A customer ran a s550 biturbo with the tune and without.
    1/4 mile Bone stock 12.89
    1/4 with tune 11.73.
    With the Cls being lighter by a couple hundred pounds we should be looking at the same or better results. That is crazy we would be looking at a 0-60 time in the high 3 seconds! Just a little slower than the amg."

  10. #35
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    This was posted on another site today. Can anyone from RENNtech verify what is shown here? Thanks
    Due

    "Renntech Tune For Cls550
    --------------------------------------------------------------------------------
    Just spoke to george at renntech and got some results for the Renntech ecu tune. A customer ran a s550 biturbo with the tune and without.
    1/4 mile Bone stock 12.89
    1/4 with tune 11.73.
    With the Cls being lighter by a couple hundred pounds we should be looking at the same or better results. That is crazy we would be looking at a 0-60 time in the high 3 seconds! Just a little slower than the amg."
    Getting details for you now.
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  11. #36
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    Thanks Sticky

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    Well that's crazy, the heavier tuned S550 is only 4/10ths slower than the tuned CLS63 (11.3s, reported by multiple tuners)? Whoa.

  13. #38
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    Thanks Sticky
    I don't think the S550 ran 11's. I heard it was 12.5 or so.
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  14. #39
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I don't think the S550 ran 11's. I heard it was 12.5 or so.
    Did you hear this from RENNtech?
    Just trying to get to the facts about the statement on the other site.
    Hope you understand.Click here to enlarge

  15. #40
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    1 out of 1 members liked this post. Yes Reputation No
    Haven't had any answers to my recent request on this site, but have a good report from another site regarding the RENNtech ECU tune on a '12 E550C.

    "Just got my ECU back from Renntech, dramatic difference. Had the dealership handle everything, charged me 1 hour labor. Figured it was cheap insurance, gets me out of the loop should any issues come up. Great service, great results. Dealer assured me there were no waranty related issues tied to the upgrade. Actually pretty comfortable with this and everyone's approach. Geez, glad I went to fat 19" tires. In sport mode the car will really get your attention. The change in "tip in" is pretty obvious."

  16. #41
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    Did you hear this from RENNtech?
    Just trying to get to the facts about the statement on the other site.
    Hope you understand.Click here to enlarge
    I speak to Renntech directly, yes.
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  17. #42
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    Haven't had any answers to my recent request on this site, but have a good report from another site regarding the RENNtech ECU tune on a '12 E550C.

    "Just got my ECU back from Renntech, dramatic difference. Had the dealership handle everything, charged me 1 hour labor. Figured it was cheap insurance, gets me out of the loop should any issues come up. Great service, great results. Dealer assured me there were no waranty related issues tied to the upgrade. Actually pretty comfortable with this and everyone's approach. Geez, glad I went to fat 19" tires. In sport mode the car will really get your attention. The change in "tip in" is pretty obvious."
    Thanks for posting, obviously we want to build up our M278 presence more and more. The M157 is more popular on this site right now for obvious reasons.
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  18. #43
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    Thanks Sticky!

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    1 out of 1 members liked this post. Yes Reputation No
    By the way, the guy who installed the RENNtech tune (post #40 above) got interested in the tune after I posted the RT press release at another site. I learned about it on this site: so chalk one sale from Benzboost (and me).Click here to enlarge

  20. #45
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    Click here to enlarge Originally Posted by Dueclaws Click here to enlarge
    By the way, the guy who installed the RENNtech tune (post #40 above) got interested in the tune after I posted the RT press release at another site. I learned about it on this site: so chalk one sale from Benzboost (and me).Click here to enlarge
    Click here to enlarge Happy to hear that. Try to refer M278 guys here!
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  21. #46
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    Before I choose a tuner for my CLS550 4Matic, I'd like to be educated as best as possible. I wish there was more info/feedback from RENNtech within this thread... as well as current uses with the M278 tune. I've tried calling and emailing RENNtech directly, but they seem elusive and/or unwilling to answer some simple questions. Since I don't race, I'm only interested in everyday street characteristics. Is it too much to ask, "What should I expect with my purchase?"

    Sticky- Perhaps you can find out the following:
    a) Is the street drive-ability compromised in any way?
    b) What about the slight turbo lag I often experience at light throttle... can that be eliminated?
    c) Are the transmission shift points altered in either the economy or sport mode?
    d) Is the speed governor eliminated (not that I will ever test that feature)?
    e) How is the fuel economy impacted?
    f) Have free flow air cleaners been tested with this tune... do they recommend them?
    g) Why do they list all the M278 engines with the same power when the factory rated them differently?
    h) Are more tune updates in the works... what about vehicle accessories?

    Anything else they could mention for features would be appreciated... I'm just trying to learn exactly what to expect.

    Thanx,
    427

  22. #47
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    1 out of 1 members liked this post. Yes Reputation No
    427
    Here's the response to some of your questions from the owner of the '12 E550C with the RENNtech tune.
    The others would be RENNtech's to answer.

    a) The most noticable change was the throttle tip in, seems more immediate and almost exaggerated in sport mode in normal mode it as you might expect. But to answer directly the change, to this point hasn't negatively impacted day to day driving. Except to say maybe a bit more fun.
    b) As to turbo lag, it's probablly as responsive as possible and still have a turbo. I am suspect of someone that tells me they have a performance turbo and has "no" lag. Lag is part and parcel to the turbo.
    c) I don't believe the shift points have been altered, could be wrong but don't think so.
    d) Also believe the speed governor/rev-limiter are still intact, as they would tie directly to warante implications.
    e) As many have stated, the mileage might be a bit better but dip into the throttle a bit more so it's probablly a wash. But certainly no losses.

  23. #48
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    Dueclaws - THANX for the feedback... would love to hear from others too!

  24. #49
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    Happy to help!

  25. #50
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    Click here to enlarge Originally Posted by 427 Click here to enlarge
    Before I choose a tuner for my CLS550 4Matic, I'd like to be educated as best as possible. I wish there was more info/feedback from RENNtech within this thread... as well as current uses with the M278 tune. I've tried calling and emailing RENNtech directly, but they seem elusive and/or unwilling to answer some simple questions. Since I don't race, I'm only interested in everyday street characteristics. Is it too much to ask, "What should I expect with my purchase?"

    Sticky- Perhaps you can find out the following:
    a) Is the street drive-ability compromised in any way?
    b) What about the slight turbo lag I often experience at light throttle... can that be eliminated?
    c) Are the transmission shift points altered in either the economy or sport mode?
    d) Is the speed governor eliminated (not that I will ever test that feature)?
    e) How is the fuel economy impacted?
    f) Have free flow air cleaners been tested with this tune... do they recommend them?
    g) Why do they list all the M278 engines with the same power when the factory rated them differently?
    h) Are more tune updates in the works... what about vehicle accessories?

    Anything else they could mention for features would be appreciated... I'm just trying to learn exactly what to expect.

    Thanx,
    427
    A lot of these were answered but let me answer what I know. Also, paging @m54b25

    a. no, it should be better with increased torque.
    b. that is likely a function of having a turbocharged motor but throttle response can be changed.
    c. don't think so
    d. yes
    e. heavier foot, it will go down.
    f. freer flowing filter will only help.
    g. just likely to save time and a small oversight.
    h. yes, more tune updates in the works and accessories.
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