<VV> Bolted Flywheel clearance

Joel McGregor joel at joelsplace.com
Wed Jul 29 10:34:33 EDT 2015


The extra weight just helps you get moving from a dead stop.  Less weight should equal better shifting because there is less inertia to match.
Frank could be correct but I think the engineering in the 3 piece flywheel went into the flex center and the inertia ring was just that - extra weight for take off.  The high performance versions added even more weight to the pressure plate I assume to help offset the lost low RPM power in the HP engines.
I always leave the inertia rings off in cars.  I wouldn't do it in an FC.
Joel McGregor

-----Original Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of clynn66--- via VirtualVairs
Sent: Wednesday, July 29, 2015 3:48 AM
To: virtualvairs at corvair.org
Subject: <VV> Bolted Flywheel clearance

I am getting my 150 hp engine rebuilt. My engine builder has machined the heads of the 12 outer flywheel bolts down so they clear the bellhousing bolts. Its neat what he has done and clearance is not an issue now.
However, the literature says the usual solution is to chuck the enertia plate  from the back of the flywheel away and don't use washers on the bottom 4 bellhousing bolts. This effectively lightens the flywheel which would probably be good for racing, but may be slightly adverse in regard to smooth gear changes in normal road driving.
My car is only used for normal road use and is not raced so I figure I am best to stick with the enertia plate as per original setup.
Does anybody have any thoughts on these trade offs. Also, would the strength of the 12 outer flywheel bolts be compromised with the top half of the heads machined off?
Colin LYNN
Perth, Western Australia
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