Re: [DMCForum] Re: throw-out bearing replacement

[Andrei Cular <acular@xxxxxxxxxxxxxxx>]

Quick RPM changes is one of the two major reasons for running a 
lightened flywheel.

The other is a slight HP increase due to less rotating mass.  However in 
street applications is has been found that running a flywheel that is 
less than 1/2 the stock weight does allow significant wear of the main 
crank bearings.  Think of a spinning top or gyroscope, the larger the 
rotating mass the harder it is to make it wobble.  The flywheel and 
crank in the engine are the exact same.

A big problem with running a light flywheel is depending on the engine 
you might have to bump the idle way up to keep it running.  On a street 
ACVW I have run all the way down to an 8lb wheel, stock is about 22lb, 
and it made the car less fun to drive in traffic.  A 12lb wheel made it 
much better and still allowed the engine to spin up quicker than stock.

Gene Berg has a nice little writeup. www.gene*berg*.com/*flywheel*s.htm
Andrei

Marc Levy wrote:

>um, Inertia ??
>
>You can lighten the flywheel to get small improvements
>in acceleration, but when you take your foot off the
>gas to shift, the RPM's will drop rapidly.
>
>
>--- Walter Coe <Whalt@xxxxxxx> wrote:
><SNIP>
>  
>
>>that it isn't a problem.  Why do they make the
>>flywheels so
>>heavy?  It seems they could be lightened up quite a
>>bit.
>>
>>    
>>
>
>
>            
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