• Weistec Engineering releases their McLaren SLR Power and Driveline upgrade packages

      The big news from Weistec on the McLaren SLR front last month was that they are in the process of developing a twin turbo upgrade package for the SLR. However, Weistec has more products available for the Mercedes McLaren SLR than just turbos. Weistec has a power upgrade package for the Kompressor/Supercharger OEM M155 V8 motor which boosts output to 715 horsepower and and 705 lb-ft of torque at the crank.

      This is an increase of 98 horsepower over the stock 617 horsepower rating. This power gain is accomplished by the use of ECU (engine control unit) software, TCU (transmission control unit), and a pulley upgrade. The power package also comes with performance spark plugs, upgraded intercooler pumps, and crank pinning hardware.

      Weistec did not provide a dyno of their power package but there is no reason to doubt the claimed figures especially with their product history and proven results. The Weistec SLR Power Package package retails for $6,899.99: http://weistec.com/slrupgradepackage.html

      Pulley:


      ECU:


      TCU:


      Spark Plugs:


      Intercooler pumps:


      Crank pinning hardware:



      The upgrades do not stop with just more power. Weistec also has driveline upgrades available designed to withstand the additional torque. The Weistec SLR Driveline upgrade package consists of a carbon fiber driveshaft, upgraded axles, and a limited slip differential allowing nearly 100% lockup.

      A carbon fiber driveshaft of course is lighter than the OEM piece and also safer due to how carbon material reacts if its capability is exceeded. Load and shock on the drivetrain is reduced. The axles of course are also stronger than the OEM pieces which is definitely necessary for someone that likes to do repeated launches on the strip.

      The driveline package will be something someone increasing the torque greatly will want to look into. It retails for $9,995.00: http://weistec.com/slrdriveline.html

      Key Features:

      • Reduced Rotational Mass
      • Reduced Weight
      • Improved Acceleration and Response
      • Eliminates factory rubber bushings on each end of the driveshaft
      • Improved Traction, Control, and Handling
      • Greatly Increased Driveline Strength


      Carbon Driveshaft:










      Upgraded CV Axles:










      Limited Slip Differential:



      This article was originally published in forum thread: Weistec Engineering releases their McLaren SLR Power and Driveline upgrade packages started by Sticky View original post
      Comments 2 Comments
      1. Maverick1975's Avatar
        Maverick1975 -
        Nice work byWeistec but seems incredibly niche market. How many of these twin turbo upgrades could they possibly sell?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Maverick1975 Click here to enlarge
        Nice work byWeistec but seems incredibly niche market. How many of these twin turbo upgrades could they possibly sell?
        It's not about making big money.

        As the M155K is similar to the M113K there is some carryover from their development.

        The turbos are something completely different though and it's a very cool project. It really shows the depth of their engineering capability.