xtyper

Compared to 14.5psi for the non-PP and 18.8psi for the PP, anyone know how much peak boost the latest Renntech tune is making? Also, how does this compare to the other vendor tunes available?

rac3rx

no one wants to answer this question for some reason. i asked a few times also

Vic55

Probably because no one knows and Renntech isnt a sponsor here.

Not sure about RT but other tuners are probably boosting over or at 21psi... depends on how strong the tune (which isnt necesarily better due to engine safety)

Mr. Happy

When I asked Kleemann, they said it was their secret. I also asked a few others and it was also their secret...

Ali_E55

well, mine is about 20PSI, but i have catless downpipe, which drops the boost a bit.

i have OE Tuning.

Karl901

Renntech boost is 18.8, same as stock PP. the difference is that the ECU on the stock PP tapers off the boost after 3800 rpm , Renntech tune holds the boost all the way to 5800 rpm.
This is why Renntech now is going to bigger turbos to increase boost to over 22.

bacchus813

Is it true that all vendors including Renntech need to drill a hole on the ECU of the 2012 CLS63AMG?

Karl901

Never heard of it, but just ask Renntech or any tuner.

freefall

So if renntech goes to bigger turbo will they have to write a new tune for the boost or are you saying that it will happen inherently?

Also - Any idea the % of how much larger the turbos will be?

And my last question is what HP will this get them to?

I'm looking to do this as soon as possible... Thanks!

absent

They expect to be around 800hp at the crank.
They also expect to drop into 9's with 140mph trap...
I have the car coming in November,hopefully the set up will be ready by then.
So far,did only the ECU in wife's G63 and the difference in acceleration is staggering.

Vic55

Thats a different tuner(s) who does that...

CLS63W218

Don't all tuners at this point in time either pry the ecu apart or drill a hole to flash the ecu? Both of these methods can easily be detected by a dealer if that concerns anyone. Hopefully they come out with a solution that doesn't need that to happen soon.

xtyper

Given the shape of the Renntech tune dyno curves where so much torque is gained in lower rpms, I find it hard to believe that peak boost was not raised beyond the PP level of 18.8psi.

Are you sure about this?

Vic55

Both can be detected but the hole is about as obvi as it gets versus other tuners warming up the glue and seperating it. If they do it right its very hard to tell it has been seperated. There is no actual seal that if broken can be detected.

hyperion667

awesome sigpic Vic.....how are you enjoying the cls?

AMGTECH

i know kleemann & eurocharged do.. and i believe seeing a Renntech tuned car come in with a plug in the ECU as well.. (but i could be wrong)

Vic55

The CLS is excellent--- fast, sounds great, relatively flawless....

and with that being said, its not as fun or involving as the C63 Black Series. I love this car.

CLS63W218

Talked to one tuner and he mentioned that he's heard of some issues with breaking the PC board on the separation method and in his opinion the drilled method was safer. Not sure if this is true or not. He said they'd Epoxy the hole closed sand it and paint it so it looks unmolested but it would surely be identifiable if compared to new. He offers the Renntech version.

freefall

Tuners secret is to put the ECU in a toaster over so the adhesive loosens enough to pry it apart. If there's a screw you got screwed...lol.

Vic55

Yep if the tuner just tries to pry the ecu apart the board can flex and can be rendered useless.... but most warm up the ecu and the glue becomes soft and they can easily seperate it.

I wouldnt want a hold drilled in mine.

wheelsloose

That is wrong. No hole in Renntech.

jbondox

seeing we did a few of them here, renntech does put a small hole. No big deal. And it is highly doubtful anyone would ever notice. And seeing I work closely with the MB dealership (#1 midwest dealer for MB) that offers the tune at the time of purchase... they never give anyone a hard time warranty wise. Now if it was done at Joes discount tuner... then i can see it being an issue.

we scan the vehicle before and after the tune. the only fault i have seen is the torque curve which is ignored when they re-program but the sds picks it up.

Now, not saying that it is a perfect world here... I did have an issue with a 2012 s65 going into limp, but tech said it was the tune... turned out after I drove it, made it go into limp, it was a faulty upstream sensor... told him to replace, no problem since.

so I am sure some dealerships will cry "bloody murder" as some techs do... but they are just stuck in the past...

Today is different, people will buy a $200k vehicle and toss another $40k easily at it to make it their creation.

Personally i like RENNtechs tune and after dealing with Brabus and Kleeman... I will only stick with RENNtech, I also believe they will outlast Brabus ... hell I don't even know how Kleeman is holding on sorry Kleeman, wish it was different

vdubpower

Dealer offers a tune. Come on. Do they also say it will or won't void the warranty and have mbusa backing them up..

See its all the stuff above that keeps me from getting a tune. Even now it seems there is inconsistency with tuners and their re-tuners as to the specifics of the process.

I'm good. I'll stick with the slow pp e63

jbondox

??????

Feel free to call them! Rock (moderator) can confirm

Mercedes-Benz of North Olmsted
440.716.2700 Helder Rosa, is the GM.

#1 MB Dealership in the Midwest
6X Best of the Best MB Dealership (1st ever to rack them up consecutively )
AMG Performance Center
#1 SLR dealer in the world
1st Autohaus in the USA
and a lot more

The only way the warranty will be voided is if the unit modified caused the damage. just like with anything ... from adding a radar detector to plug in the cigarette lighter GPS units...

Vic55

So modding an ecu to change engine boost and or timing that leads to engine failure would not be covered? (the Engine) Sounds about right--- the dealer is offering no added warranty here base on the facts presented here.