Posts Tagged ‘tune’

RENNtech CLS 550 Biturbo (C218) on the Dyno

Wednesday, May 8th, 2013

RENNtech modified CLS 550 biturbo (C218) on the dyno for a performance pull and top speed run featuring our latest 550 upgrades for the CLS.

For more info on our CLS 550 BT products click here:

RENNtech tuning for BMW Diesels

Wednesday, September 26th, 2012

Big power with RENNtech tuning- available now for BMW diesels- Click here for more information:

RENNtech BMW/Mini ECU Promotion

Wednesday, July 11th, 2012

Our BMW tuning line up has been generating quite a buzz lately and to add a little fuel to the fire we are offering up the chance to win some goodies.

From now until July 20th, 2012 you can register online to win a RENNtech ECU upgrade for your BMW/MINI. We are also offering those in the South Florida area (or willing to travel) the chance at one of five spots for dyno time at ourWest Palm Beach, Florida facility

Register online by clicking  HERE

and completing the online  form.

Entries must be received before midnight on July 20th, 2012.


CLS63 Biturbo 10.79 @ 130.77mph- Fastest Run To Date

Tuesday, May 15th, 2012

From RoadTest TV:

We recently attended the event held at Palm Beach International Raceway on May 6, 2012. This is the 3rd StreetCarDragsevent we attended, and, as before, many amazing cars showed up to race including multiple Corvette ZR1s, GTRs, Vipers, Evos, Camaros and some Benzes. Trophies were awarded for the Fastest American Car, Fastest Japanese Car, Fastest European Car, Best 60 foot time and Best Reaction Time.

The Benz that brought home the trophy for the Fastest European car was RENNtech’s 2012 CLS63 with a stout 10.79 @ 130.77 mph. RENNtech brought out a few of its project cars and gladly accepted our request to strap some of our test equipment into its record setting 2012 CLS63 to get some performance numbers.

May in South Florida is generally warm and humid, and May 6th was no exception. At the time of our testing, the temperatures were in the mid to high 80s with a density altitude of over 2000 feet.  Despite the less than desirable conditions, the acceleration numbers were staggering from RENNtech’s warmed over V8 BiTurbo CLS63 …. as you can see from the data below:

RENNtech        STOCK
0 to 60 mph       3.0 seconds   ( 4.2 seconds)
0 to 100 mph     6.5 seconds   ( 9.2 seconds)
60 to 130 mph    7.6 seconds   (11.4 seconds)

The RENNtech CLS63 has the following mods: RENNtech modified ECU, larger heat exchanger, high efficiency intercooler pump, 100% locking differential, high flow downpipes with 200 cell cats, drag radials and front skinnies. The RENNtech CLS is still equipped with its stock turbos and stock airboxes (for now..), and the car retains all of its stock interior as no weight was taken out of the vehicle.

We also got a chance to log some miles on this car after the event and can say, without hesitation, that the rush of power from the RENNtech mods is eye ball flattening at every RPM.   However, the RENNtech CLS63 is a docile as a stock CLS63 for everyday use.

Tune Only 2012 RENNtech E63 runs 11.15 @ 126.7 mph!

Tuesday, April 17th, 2012

An otherwise bone stock, tune only 2012 Mercedes E 63 ran an incredible 11.15 @ 126.7 mph quarter mile this past weekend at Palm Beach International Raceway. The E63 dynoyed an impressive 578.33 horsepower and 621.93 ft/lbs of torque at the wheels (680 horsepower and 732 ft-lbs of torque at the crank) with the RENNtech tune installed. That is a 100 horsepower gain over stock!

The run was made with the stock exhaust, stock wheels and OEM street tires in 80 degree temps with damp track conditions. Needless to say, we expect quite a bit more out of the new biturbo E63 and will certainly be breaking into the 10′s very shortly.

Stay tuned as we continue to push the performance of Mercedes latest powerhouse.

Here is a video of the run:


RPM Lifestyle Spring 2012 on RENNtech Modded CLS 63

Tuesday, April 10th, 2012

The spring 2012 issue of RPM Lifestyle magazine featured a great write up on the RENNtech modified CLS 63 done in collaboration with Vossen wheels.

The Article can be read/downloaded in its entirety by clicking here:

Red and Black SLS Roadster

Friday, February 3rd, 2012

The second SLS roadster to come through RENNtech has just been completed leaving with a RENNtech exhaust upgrade and performance ECU tune.

The car now sounds as fast as it looks thanks to the RENNtech long tube headers, secondary cat bypass and sound & performance with x pipe now installed. The red & black exterior color combination is truly stunning and with all the new found power and incredible sound; this SLS roadster is sure to turn heads everywhere it goes.









CLS63 Biturbo New Record- 10.98 @129.40 mph!

Monday, January 9th, 2012

RENNtech’s 2012 CLS63 broke the 11 second barrier by running the 1/4 mile in 10.98 @ 129.40 mph (208 kmh)! This officially makes it the world’s fastest CLS63.

Our latest run surpasses our previous 1/4 mile time in the same vehicle with a previous record of 11.21 @ 126 mph with only a tune and drag radials posted last month. Since then we have added a RENNtech 100% locking limited slip differential and an in development performance exhaust modification in addition to our performance ECU upgrade. The new biturbo engine now makes 688 crank horsepower and 765 lb/ft of torque; transforming the CLS63 into an all out road rocket!  The vehicle made the pass in S+ (Sport Plus) and made the run from idle without launch control activated.

To view our ever expanding product line for the new Mercedes biturbo engines, visit our webpage by clicking here:

CLS63 RENNtech ECU tune review

Monday, January 2nd, 2012


RENNtech Adds 100 WHP to CLS63 AMG


I love the aftermarket. They are the fringe chefs of the auto world. No content with the way something is made, they will take a classic dish-say, risotto – and then add crazy stuff to it like maple syrup and essence of deadly sea urchin. You might think, “What are you doing?? It was delicious the way it is!” But then chefRENNtech presents his 2012 Mercedes CLS63 AMG risotto and after a taste, you stop complaining. Because RENNtech has found that with a simple tune you can extract another 100 wheel horsepower. Yum.


I’m not that surprised the CLS has big power potential, because it has a big V-8 with two turbos feeding it air like it’s making foie gras. But I didn’t think you could get 100WHP out of a simple chip. AMG cars always respond well to mods, but this is ridiculous. The other day we were discussing which is a better idea, buying a CLS 550 and chipping it, or dropping significantly more money for the AMG. Well RENNtech dyno’d all of them, including a CLS63 AMG with the performance package, and one without. Check out the dyno below.



The blue line is a stock CLS63 AMG without the added Performance Package. Red line has the $7,500 Performance Package option ticked, raising power from 518HP/516tq to 550HP/590 tq. The Performance Package isn’t anything intense, it just raises boost from 14.5psi to 18.8. On the dyno, they put down 483WHP/478tq and 516WHP/544tq, respectively. So that means A, they’re both really fast and powerful and B, both are a little under-rated from the factory. Despite what your forum or 13 year old cousin has said, these cars are fast as hell. I know its 0-60 time (4.4) isn’t as fast as the Nissan R38 that had twin-supra motors and really strong guy pushing behind it, but in the real world the CLS63 AMG is fast as hell. I spent a week with one. The only place this car is slow is on the internet.



Then RENNtech starts throwing things in the pot, to satisfy crazy people like  your cousin or wealthy Russians. Or wealthy anyone, really. Their chip gives the CLS a little more of the boost it craves so much, and just like that, it is putting down 583WHP and 643 torques. These aren’t gains at the crank (those numbers are 669hp/734tq. Yes, that is a “7″), this is at the wheels. You know, the part that pushes on the ground? This brings the 0-60 time down to 3.4 seconds, and the 1/4 mile is gone in 11.3s (or 11.2 with DRs).

RENNtech for BMW

Thursday, December 22nd, 2011

RENNtech is proud to announce our latest line of proprietary BMW ECU tuning for late model vehicles.

RENNtech has been the foremost tuning authority on Bosch and Siemens engine control units since electronic engine management started to show up in vehicles during the mid 1980′s. Our proprietary tuning software and approach for BMW is built upon the same rock solid foundation as our Mercedes line and is completely unique and independent from our Mercedes tuning program.

RENNtech tuning software is developed and tested in house to ensure significant gains in performance and throttle response without sacrificing your daily driver BMW’s reliability. By modifying ignition timing and throttle mapping, optimizing air/ fuel ratios, increasing the top speed limiter, improving engine cooling and modifying boost mapping for turbo charged vehicles; RENNtech performance software unleashes your BMW’s true potential.

A little teaser video:

Our X5M tuning software has already generated quite a buzz and put down some pretty impressive numbers and ran the 1/4 mile in 11.99 @ 114 mph
a link to the video can be found here:

Visit our ever expanding product catalog on our website (and receive an additional 10% holiday discount through January 15th 2012) for additional information and pricing on our BMW tuning products- click here