Posts Tagged ‘time slip’

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:

RENNtech BMW X5/X6M Runs 11.99 @114.05mph- TUNE ONLY!

Monday, November 21st, 2011

The RENNtech ECU upgrade is the ultimate tune for the BMW X5/X6M! Our tune allows the SUV to run an astonishing 11.99 @ 114.05 mph in the quarter mile. Our ECU also alows the M SUV to accelerate from 0-60 mph in 3.75 seconds and 0-100 mph in a mere 9.2 seconds!

Our proprietary BMW ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units.

These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980′s, though our proprietary tuning software and approach for BMW is completely unique and independent from our Mercedes tuning program.

RENNtech tuning software for BMW offers 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.

Stock Performance BMW X5/X6M (E70/E71 S63B44 V8 Biturbo M)

  • 555 HP @ 6500 RPM / 500 TQ @ 3600 RPM


  • 625 HP @ 6500 RPM / 600 TQ @ 3600 RPM

Visit our website for additional information and pricing by clicking here:


World Fastest Mercedes Record Regained By RENNtech

Thursday, April 7th, 2011

On April 1, 2011, RENNtech regained their long standing title of worlds fastest Mercedes Benz. Our RENNtech modified CL65, which held the long standing previous record once again reigned supreme by shattering its previous best quarter mile time with an unprecedented  run of 10.27 @ 137.46 mph at Palm Beach International Raceway. This official time makes our CL 65 the fastest Mercedes on the planet.

The previous record of 10.51 @ 135.11 mph, also held by RENNtech’s CL65, was broken just last week by a C63 running 125 shot of nitrous which logged a 10.41 @ 135.27 mph run on 3/25/2011. Not one to be bested and looking to regain the title; RENNtech went back to work in search of even more from the CL 65 with further improvements and without the use of nitrous. Modifications to the CL 65 included an even more aggressive race only tune, enhanced drive line modifications such as upgraded transmission internals and a prototype torque converter and additional light weighted vehicle components. These are in addition to the already installed RENNtech modified ECU/TCU, carbon airbox, limited slip differential, high flow exhaust, drag radials, modified heat exchanger and intercooler pump.


  • 60′ – 1.626
  • 330′ – 4.412
  • 1/8 – 6.682
  • MPH – 108.99
  • 1000 – 8.629
  • 1/4 – 10.274
  • MPH – 137.46

RENNtech looks to continue shattering our own records and will be further modifying the CL in search even more performance in pursuit of the first 9 second Mercedes Benz. Congratulations to Steve C., car owner and driver, on this incredible achievement.