I can attest to the advantages of a lightened flywheel from a strictly 
performance and from a performance/dollar perspective. In the winter of 2000, 
while installing an OD transmission, doing some clutch work and replacing the 
rear seals, I did some research using the list about removing weight from the 
flywheel.  The opinions were varied as you would expect, but most everyone 
recommended it as a relatively inexpensive way to quicken engine spool-up.
I found a local shop who did not do the work themselves, but had a guy who did 
it on the side.  As many on the list recommended, I took my flywheel down from 
28 to 18 pounds.  The removal of the metal and re-balance of the flywheel cost 
$70. When I got everything back together, I was amazed and pleased with the 
improvement in performance.  I have not experienced any negatives at all from 
removing the weight.  I experience no problems in starting from a dead stop and 
don't really have to raise the RPM's much to get moving.
I would highly recommend the removal of this weight as an inexpensive means of 
improving the performance.
John Shewmake
'74 TR6
Chattanooga, TN
 
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