Supersport Mk2 Rotating Weight Improvements

 

There is an old adage in racing concerning parts weight that goes like this, “Light, strong, cheap, you can only pick two”. The Supersport having been designed with strength and safety as the main priorities was admittedly not the lightest car on the market.  At approximately 2300 pounds it is lighter than the IMSA GT cars so it is not heavy by any stretch.  Rotating weight is an area of particular concern on any race car.  The energy required to speed up or slow down the rotating weight can have a measurable effect on overall performance.

Two areas that have received particular attention in developing the Supersport Mk2 are the brake rotor and wheel combination and the clutch and flywheel package.

 

Brake rotors Mk2 lr

 

First the brakes.  Everybody that has driven the Supersport has been impressed with the braking performance.  The large 6 piston Wilwood front calipers and the 4 piston Wilwood rear calipers provide plenty of stopping power.  Brake control is positive and no fading was ever experienced.  The one fault that appeared was premature rear rotor wear.  We decided to improve the brakes by using Wilwood’s Premium Spec 37 iron discs mounted on aluminum hats. The new Wilwood discs are a very high quality material providing better cooling and have the added benefit of being lighter than the original rotors previously used. The front rotors are 4.8 pounds lighter and the rears are 2.2 pounds lighter.  Coupled with the new larger but lighter wheels the total savings in rotating weight is 15.8 pounds.  This savings has a cost but we chose light and strong over inexpensive and heavy.

 

Flywheel lr

 

Secondly, the clutch and flywheel.  With the change to the 3 MO Performance transmission a change to the clutch and flywheel was necessary.  The original OE flywheel on the LNF engine weighed a whopping 32.4 pounds.  We had already changed to an aluminum flywheel that with the OE type clutch brought the weight down to 21.6 pounds.  Now by again choosing strong and light over inexpensive and heavy the new one piece steel racing flywheel and Alcon clutch weigh only 14.4 pounds. This weight savings is all rotating weight at engine speeds.  The huge reduction in MOI will have a measurable effect on the performance of the Supersport Mk2.

The final touches are being put on the Supersport Mk2. Appointments to test drive this amazing new car are available!

 

IMG_6203 2 lr

 
 

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