Lemme see if i've got this right.
I'm thinking of getting the parts to swap in the F body Flywheel. I've been reading through the search'd threads on this topic and here's where i'm at:

i should get the new F body STEEL flywheel, turn it .090", then have it balanced to the exact spec of my Dual Mass flywheel.

Then i need to use a clutch w/ sprung hub.

If i do these things, i shouldn't have much more noise than stock. Correct?

Has anyone done this exact procedure (not w/ Fidanza or a solid hub)? what are your experiences?

thanks,

Mike

 

I have heard that you mill .180" off the flywheel. You can use the C4 or F-car pressure plate, but you do need the sprung hub clutch disc (F-car disc will work). If you are buying all these pieces new, just call SPEC/Star Clutches and they can sell you a complete steel single mass kit that does not require any machining or balancing. It will be a couple pounds heavier than the F-car stuff, but will still be lighter and cheaper than the dual mass set-up.

 

Here's an article I found.



"Single Mass Flywheel Conversion for ZF6
Since the introduction of the ZF6 in the Corvette, it has used a 'dual mass' flywheel to dampen gear clatter. It is very heavy (37 pounds) and is not ideal high horsepower clutch (not too mention very expensive-$630+) as the flywheel tends to warp under severe heat.

An alternative is to install a 'regular' flywheel that is single piece of metal used on LT1 Camaros for instance. This will reduce the flywheel weight by ~15 pounds.

Below I have detailed the parts needed and process to install a LT1 'single mass' flywheel in your Corvette with a ZF6.

Of course, proceed at your own risk...

Parts needed:

1996 LT1 Camaro Flywheel-----------------10125379[GM]~$170
1996 LT1 Camaro Disk---------------------12551309[GM]~$175
1996 LT4 Corvette Pressure Plate-----------10222083[GM]~$220
1996 LT4 Corvette Pressure Plate Bolts (6)-10079898[GM]~$15
ARP Flywheel Bolts (1 inch long)------------200 2802[ARP]~$10

I purchased all my GM parts from Jeff Kopp-about the cheapest around even with shipping from Kansas City.
I would recommend new pressure plate bolts as well since the OEM bolts don't look to the strongest for a second use. I did you the OEM rather than go aftermarket as they seem to be unique in size for the pressure plate.

You will need to have the flywheel surfaced .090 inch. This is a considerable amount and some machine shops aren't capable. This cost me $80. Another option is to purchased a surfaced flywheel from Doug Rippie Motorsports. Their price is comparable to having it done yourself.

My understanding (no experience) you can go with the Corvette friction disk, but this disk is not a 'sprung' hub design. The Camaro is a 'sprung' hub design, supposedly lessening the noise. The Corvette disk is significantly cheaper (about 40 bucks).

One compromise is the balance of the dual mass is difficult (impossible) to replicate to a single mass flywheel. The dual mass has small holes where one is to put weights in just like the original for a replacement for instance. The single mass also uses these holes, but are placed in different locations. And one can't make the single like the dual in balance as the dual is made up of two movable flywheel pieces. The negative with this is a minor vibration at rpm-noticed by minor blurring of the rearview mirror. Your experience may be different.

End result is a cheaper, lighter, (hopefully longer lasting clutch package with the negatives of the balance issue and the noisy gear clatter in neutral with clutch engaged (for instance at stop light, but can be eliminated by disengaging the clutch). Very impressed with the results so far with 25,000 hard miles"