Re: Centerforce clutch/pressure plate vibration question?
Does she vibrate in neutral at RPM? If so, do this,..
Remove the flywheel and PP. Take them both (and PP bolts) to a machine who can balance both, together. He will mark the 12 o'clock position on both parts he used for balancing and to be used on subsequent installation. (You'll likely have to turn the engine by hand to achieve the 12 o'clock position,..the flywheel needs to align with the "7th hole" on the crank flange).
Even the best PP's and flywheels on the market purchased brand new are not perfect no matter the brand (don't tell me otherwise). And even with the correct PP bolts with the 'shoulders', there's still "slop" in the mounting. That's why the 12 o'clock position is important. It guarantees the fly and PP will be mounted (gravity) in the exact same position as when it was balanced.
I'm sure you'll be shocked when your machine shop tells you the amount of weight he moved around,..20g, 30g, 40g, 50g, etc,..and on brand new parts.
If after this, if you still have vibration, you'll next need to neutrally balance your balancer.
But, there's a 95% chance the problem is in the PP and/or flywheel.
After several bouts of 'vibration issues' suffered myself on several cars (usually higher RPM'ers) , I'll never install a new fly or PP without them being balanced prior, together.
Last edited by Straight-line-69; Oct 14th, 14 at 08:48 PM.