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C63 Renntech program

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Old 01-27-2009, 04:09 PM
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C63 09' LSD traded for 2010 GT-R
C63 Renntech program

Well after breaking in the car with 3,900 miles I just had RENNtech flash my ECU yesterday.

Results very impressive, before and after dyno runs. 80 degree weather.
Gains of 60RWHP & 32RWTQ over the stock tune.

Driving impressions, wow what an improvement at speed over stock. 60-120 is a big improvment.

I can highly recommend the Renntech tune on your C63.

Have fun, this car is a blast!
Old 01-27-2009, 04:13 PM
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2009 C63
What year is your C63?
Old 01-27-2009, 04:16 PM
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C63 09' LSD traded for 2010 GT-R
2009, 8-2008 production with partial 030 package
Old 01-27-2009, 04:28 PM
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Steel Gray 09' C63 AMG
What ECU tune did you get, or is there only one level? Did they tune the Trans also or just the engine? Any other Renntech upgrades to go with it? Cost?

Sounds like fun.

-Troy
Old 01-27-2009, 04:53 PM
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C63 09' LSD traded for 2010 GT-R
Only a ECU tune, there was an option to change programs back to stock etc but since this is a street car running on pump gas I did not see a need to do anything else. Also I knew that I would NEVER put it back to stock tune after feeling this increase.

I cannot comment on the tranny changes but the shifting is perfect.

Once the airbox is produced I may go with that as well. This is such a dramatic increase over stock that I cannot see getting another 10-20RWHP being something I could feel much. I may change my mind...
Old 01-27-2009, 05:52 PM
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SLS Irridium silver,2014 GL350 BT Irridium, 2015 White Dodge RAM Hemi Quad
What is the cost for this reflash?
Old 01-27-2009, 06:15 PM
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2009 C63
Originally Posted by 1st amg
What is the cost for this reflash?
see attached price list for C-class products
http://www.renntechmercedes.com/c.html
Old 01-27-2009, 06:26 PM
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'09 C63 AMG
Dyno graph, type of dyno, gear tested in, correction factor?

Thanks
Old 01-27-2009, 06:57 PM
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C63 AMG
Did you get the level 1 or 2 ECU flash??

Is it possible to get a ECU sent to them to be flashed?

What was the cost. Im interested in lvl 2.

Do they offer to put it back to stock for leased cars?
Old 01-27-2009, 06:59 PM
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'09 C63 AMG
Originally Posted by Merc63
Do they offer to put it back to stock for leased cars?
You can always have the dealer flash it back to stock for you (should cost 1hr or less of labor) at the end of the lease.
Old 01-27-2009, 07:16 PM
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C63 AMG
Will the dealer say anything if you ask to flash it back to stock?
Old 01-27-2009, 08:03 PM
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C63 09' LSD traded for 2010 GT-R
From my Dyno results I would say I got tune #2.

The price on the list posted earlier looks accurate, I also had the dyno time before and after. Pulling the ECU is easy, I would say pretty do-it yourself. Then Fed-Ex it to the them to flash and send back. I am sure they have a format for this. The price was more than others I had seen (for example Kleeman) but Renntech's reputation is solid and the fact he is local made a difference to me as well. I would imagine they have no problem putting it back to stock when you get rid of the car. Talk to them for further pricing.

I would rather not post the Dyno run since I did not ask Harmut if he would mind. I do have a copy.

The dyno is a Dynojet, so the results are repeatable and consistant from my experience. It was 80 degrees, so I would imagine it would pull stronger at 50 degrees.

Hope this helps. I am just a happy customer.

PS. I have the Active Aautowerke TK Turbo M3 for sale and it dyno's with race gas on a Dynojet 709RWHP! pump gas about 460RWHP.... but my C63 rocks with the instant torque.
Old 01-27-2009, 08:06 PM
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What I like!
Originally Posted by catesbym
Driving impressions, wow what an improvement at speed over stock. 60-120 is a big improvment.

I can highly recommend the Renntech tune on your C63.

Have fun, this car is a blast!

Thanks for your feedback. 60 +mph, freeway speeds, is where I think the car could use more power too. Glad you are liking it. I'm looking forward to more impressions as you put more miles on it.
Old 01-27-2009, 09:41 PM
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'09 C63 AMG
Originally Posted by Merc63
Will the dealer say anything if you ask to flash it back to stock?
I'm not sure there's much they could say or do less bill you for an hr of labor. It would be rather stupid on their part to void the warranty on a lease turn-in, lol, then again, you never know.
Old 01-27-2009, 09:56 PM
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'22 G 63 AMG, '21 GLE 53 AMG, '20 NSX
Originally Posted by catesbym
Well after breaking in the car with 3,900 miles I just had RENNtech flash my ECU yesterday.

Results very impressive, before and after dyno runs. 80 degree weather.
Gains of 60RWHP & 32RWTQ over the stock tune.

Driving impressions, wow what an improvement at speed over stock. 60-120 is a big improvment.

I can highly recommend the Renntech tune on your C63.

Have fun, this car is a blast!
What was your 60-120 time? Dyno numbers can vary a lot but time to speed is a better indicator.
Old 01-28-2009, 12:03 AM
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M5, C63, 335Ci
60 - 130 mph would be better than 60 - 120. It is more of a standard measure used to rate cars.
Old 01-28-2009, 02:39 AM
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C63 AMG
Does altitude matter for the tune? You guys in Cali are much closer to sea level then me in Alberta, Canada.

Any idea how long it takes from time sent to them to get the ECU back?
Old 01-28-2009, 06:49 AM
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C63 09' LSD traded for 2010 GT-R
I would imagine Hp adjusts downward as you go higher on our non-forced induction cars.

I don't have a way to accuratly measure the 60-120(130) times so I would not attempt it. Suffice to say the car hits WAY harder now than it did. Most of my driving is around town, not full throttle, There is also an improvement squirting around at low speeds.

The whole process of dyno and programming took about 2 hours so I would say the ECU would be a fast turn around back into your mailbox.
Old 01-28-2009, 10:52 AM
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'12 CTS-V
catesbym, I am also in FTL and trying to decide b/n tunes rite now. If u ever want to get together and run the cars side-by-side to show the real world performance gains from Renntech, let me know. I would be happy to do it...and get a ride in ur car for a comparo.

I'm 100% stock btw.
Old 01-28-2009, 10:56 AM
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C63 09' LSD traded for 2010 GT-R
I just PM'd you.
Old 01-28-2009, 02:31 PM
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M5, C63, 335Ci
Would like to hear how the comparison goes if you two do it. Vids please!

I have the Renntech stage 2 flash and the CF airbox from MHP and my car pulls really hard. I have a friend with a vbox that I'm going to borrow and get some 60 - 130 times. I'll post those up when I get them. I'm also going to be doing some videos of runs against an E60 M5 for comparison purposes.
Old 01-28-2009, 02:34 PM
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C63 09' LSD traded for 2010 GT-R
Should be a good difference. We will see.
Old 01-28-2009, 02:57 PM
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Originally Posted by catesbym
Should be a good difference. We will see.
Absolutely. Gonna be a good time.
Old 01-28-2009, 03:51 PM
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Originally Posted by catesbym
From my Dyno results I would say I got tune #2.

The price on the list posted earlier looks accurate, I also had the dyno time before and after. Pulling the ECU is easy, I would say pretty do-it yourself. Then Fed-Ex it to the them to flash and send back. I am sure they have a format for this. The price was more than others I had seen (for example Kleeman) but Renntech's reputation is solid and the fact he is local made a difference to me as well. I would imagine they have no problem putting it back to stock when you get rid of the car. Talk to them for further pricing.

I would rather not post the Dyno run since I did not ask Harmut if he would mind. I do have a copy.

The dyno is a Dynojet, so the results are repeatable and consistant from my experience. It was 80 degrees, so I would imagine it would pull stronger at 50 degrees.

Hope this helps. I am just a happy customer.

PS. I have the Active Aautowerke TK Turbo M3 for sale and it dyno's with race gas on a Dynojet 709RWHP! pump gas about 460RWHP.... but my C63 rocks with the instant torque.

Can you at least post what was your base dyno numbers and what it became after the tune? This should be very good advertising for RennTech, as they've posted dynos on here before.... I don't know why they wouldn't want to show their gains

Last edited by MB_Forever; 01-28-2009 at 06:50 PM.
Old 01-28-2009, 04:17 PM
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Originally Posted by MB_Forever
Can you at least post what was your base dyno numbers and what was it afterwards? This should be good advertising for them, as they've posted dynos no here before.... I don't know why they wouldn't want to
+1

If you're seeing great gains from the flash, why wouldn't Renntech want the c63 community to know?


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