[TR] mild cam addition

Randall tr3driver at ca.rr.com
Thu Aug 13 21:50:28 MDT 2009


> but I stand by my
> thoughts, something else needs corrected if you need 2000 to launch on
> level ground.

No doubt, but the "something else" IS that lightweight flywheel.

With a 4-cylinder 4-stroke, you only get two cylinder firings per crankshaft
revolution.  And with the throttle just barely open (as in a mild launch),
each firing produces power for only a small fraction of a revolution.  The
pistons are producing no power, most of the time.  Without that boat anchor
flywheel to store and deliver power on demand, it becomes very easy for the
crank rpm to drop below where the engine will continue running.

OTOH, not having to accelerate that flywheel makes a real difference in the
car's overall performance, especially in 1st and 2nd gear.  I had the choice
of not moving it to the project TR3 (since it already had a perfectly good
original flywheel and clutch); but that's where it is.

Yes, it's won't last forever like the original clutch did.  Always some
compromise when you start trying to increase performance.  But it's got at
least 30,000 miles on it, and I didn't bother having the friction plate
relined.

Randall


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