Rob@vividracing

Yeah I can get stock ecu's but they are $3500. I thought about it but couldn't justify the extra $3500 would of made the ecu upgrade nearly $7k....

sinistersurge

I just spoke with Bob Brady @ Renntech and he said it won't work anyway. The car can only be programmed to work with one ECU at a time. You can't switch/PnP.

Rob@vividracing

Yeah you would have to see the dealer to load each ecu. Sorry didn't think about that side of it.

Vic55

Yes and there are no PP ECU's in stateside right now (as of last check) and only 1 in Germany... its a decent turnaround if I ever wanted a 2nd one. And dealers are not so inclined to reprogram an ECU for no reason.

Ali_E55

i found it online that cost about 850 Euro

use MB part number

i don't think making a clone of the ECU will work, as i read it will check sum everytime you turn the car on, or something like that.

Vic55

I think you have to order the ECU via your car's VIN so clones dont work.

Ali_E55

just get it plain, and install it on your car,

call the dealer claiming the car didn't start, they will flash it online and try it. if it work ( and it should ). then it will be okay.

IND-Distribution

Nice post Rob! We just sent shipped our CLS63 ECU out to Renntech for the tune.

Rob@vividracing

Great, good pictures BTW!. What else are you doing? Does eisenmann build the stock system for this car?

kohjul

so for getting the renntech ecu tune, we need to ship our ecu and send to renntech to get it flash?

Rob@vividracing

correct, the turn around if they get it in the am is same day so down time with the car would be 2 days. Monday out and back Weds kind of thing.

sinistersurge

Any more updates on this? How is the car running? Any issues?

Rob@vividracing

Car is running flawlessly. Honestly I have nothing but great things to say about the group at Renntech. I feel like the software for these cars is should be a no brainer to any owner.

Why would you spend the $100k on the car and not spend an extra $3k to get another 110hp and 150 torque.

oliver@velosdesignwerks.com

The tune are pretty much straightforward and a no brainer for the most part. Enjoy your car in good health.

sighting

the drop is not tires spinning. its the turbo spooling up. 4.3psi extra will do that. but the end result should due worth it.
Do they offer a 16.8psi version that only delivers 60hp but kicks in sooner?

Zolivary75

Rob,
I also sent my cls to Renntech. I don't have have the image yet to post but on renntechs dyno it showed almost 580 HP and matching torque. It really changes the entire car. I was so impressed I sent it back to them to upgrade the transmission, the slip differential, add the upgraded cool system, and change downpipes to 100. Can't wait to get it back....

freefall

I couldn't agree more. Spoke to Bob yesterday...ECU is going out on Monday...

Mr. Happy

With the Renntech ECU upgrade on a C218, do you get hp and torque significantly greater than the PP levels (about 550hp and 600 tq)?

desant89

What kind of gains are people getting with pre 2012 CLS63's? All I see are 2012 results everywhere I search. Is there an ECM tune for those cars? If so, what kind of gains do they get. Only asking as I am considering buying an 08 CLS63, and want to make sure that the tune is also a huge difference in that car as I currently drive a supercharged Challenger, and I do not want to end up with a slower car. Thanks!

Vic55

Completely different gains in a normally aspirated 2008 CLS63 versus a twin turbo 2012 CLS63... In fact you would probably see maybe 20 whp from a tune on 2008 vs gains of 80-100 whp on a 2012 CLS63.

So basically- No you will not see anything close.

As for your supercharged challenger, what does it trap in the quarter- whats does it run zero to 100... 60 to 130 mph. Not sure about a CLS63 (2008) being slower or faster until we get some more data. FYI a tuned 2012 CLS63 will trap over 126mph and run low 11's in the quarter.

Mr. Happy

Vic, would the gain you quote be over and above the regular 2012 setup or the performance package setup?

freefall

Yes...I sent mine over there today and can't wait to get it back. These are their claims on the site and I have done enough research to believe it.

"Our ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 556 HP and 550 lb/ft torque, to an astonishing 669 HP and 734 lb/ft at the crank! This allows the CLS 63 to run the quarter mile on D.O.T. street tires in an impressive 11.3 seconds at 125 mph with 0-60 mph coming in a mere 3.4 seconds."

Ali_E55

again not trying to bash or anything, but their gains were not over 100whp over PP car.

they put 669hp based on 580-590whp
stock pp puts about 520whp.

so 80whp does not = 115hp on crank.

infact, check kleemann website and you will see they have 690hp for just a tune i belive these companies are calculating 18-20% drivetrain loss

maybe with other mods
- downpipe
- Air filter
- extra cooling

you will get above 600rwhp.

my .63 cent

Mr. Happy

Very useful info. Many thanks!

desant89

Took the car twice to know what it runs. It was 60 degrees in Atco NJ, and I had a full tank of gas (amateur mistake):

60': 1.772
330': 4.884
1/8: 7.464
MPH: 94.97
1000: 9.690
1/4: 11.569 @119.81

I did have a friends 17": Hoosiers on it with the above run. I ran a 12.07 1/4 with my 20" street tires.