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Do not lighten flywheel!

Gentlemen
  Do not shave the flywheels to lighten them.  The flywheel is a "HEAT
SINK".  Less material, less volume to absorb the heat.
  In 73' before I had brains, I "thinned" down my flywheel for quicker
acceleration during auto-crossing.  I was using a solid metal clutch, which
absolutely would not slip.  You either chirped the back tires, or the motor
stalled.
  I finished with a good season, but when I inspected the clutch parts
prior to the 74' season, I found cracks coming from all of the flywheel
bolt holes.
  Running on a budget,for fun in the stock class, I didn't have a scatter
shield under the tunnel.  If the flywheel had let go at 5-6,000 rpm, I
might not be writing this.
  If you want a light flywheel, pay the bucks and buy a well engineered one.

 Dan Patzer the CyberWrench from BIMMERS ONLY Seattle's exclusive BMW hobby
shop
Providing O.E.M. parts, Independent service & Instruction since 1964
 12724  Marine Drive,  Marysville, Wa. 98271
72' tii touring   K1200LT   85' 732i   R850R
http://www.nwlink.com/~bmrfamly/   425-259-3601
MEMBER IBMWSP

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