C-2 friction disc

[Hector Guzman (42881)]

I have a 66 427/390 hp engine. The flywheel's inside diameter is 13 1/4 inches. It's the original flywheel and looks to be in great shape. Should I use a 10 1/2 or 11 inch disc? What is the difference? Thanks for your help. Hector

[Stephen Lavigne (7553)]

Re: C-2 friction disc

The 11" disc has more surface area and should withstand more torque. I don't know if the bolt patterns will be the same....
In either case, no matter how "good" the flywheel looks DEFINITELY have it resurfaced (about $35). A new disc on a used surface doesn't add up to a winning combination.....

[Joe Lucia (12484)]

Re: C-2 friction disc

Hector----

I don't know how you're measuring the flywheel. However, there were only 2 flywheel diameters used for all 1963-81 Corvettes. Those sizes were 12-3/4" and 14". Your 1966 L-36 originally used a 14" flywheel. I'm sure that's what you still have. With this flywheel use an 11" friction disc.

[mike cobine]

Balance it

Most will tell you it is unnecessary, but take the pressure plate along and have them resurface the flywheel and then balance the two. You'll be amazed at the difference when you get it back.

[Hector Guzman (42881)]

Re: C-2 friction disc

Thanks Joe, Steve and Mike. I meant to write,the outside diameter (not including the flywheel ring gear) is 13 1/4". Thanks for the info.

Hector.