>A freer revving motor would be
> nice, so the questions are:
> 1.  If the flywheel is lightened, will that give improved response to
> throttle?

Possible, depends on condition of your engine and other parts.

> 2.  What about the down sides, such as increased vibration, easier to
> stall while lugging, etc......

The down side is increased engine harmonics across the crank, resulting in
main bearing pounding out. Remember at 70 the engine is turning @4000, the
center of the crank is flexing.  Reducing the weight on the end will allow
it to flex more and start at lower revs.

 The crank will start to vibrate at lower speeds because of the lighter
weight on the end to balance harmonics
out.
The will be harder to maintain a constant speed.  The weight on the flywheel
helps to keep speeds constant.

> 3.  If not this, then how to get an easier revving motor?  Get the Audi
> 5 cyl?

No.
Install a walker turbo muffler, 1.25 ratio rockers with swivel rhino feet,
Chromoly push rods, free flow air filter- K&N, other, depending on miles New
air flow meter (track wears out sending erroneous signal to brainbox)

I hve done this and more to my engine and it goes to 5600 rpms strong.

Robert

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