Early or Late style clutch

Post Reply
Posts: 27
Joined: Thu Jul 12, 2007 2:18 pm

Early or Late style clutch


Post by keiser » Wed May 28, 2008 9:17 pm

What do most of you run for your clutch - the correct 3 1/2 plate with spring disk or the later 5 plate used on the shovelheads?

Pros and cons? Any issues with clearance using the later setup with tin primary?
Last edited by keiser on Thu May 29, 2008 4:25 pm, edited 1 time in total.

Posts: 6911
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 268 times


Post by Cotten » Thu May 29, 2008 3:14 am

My objective experience is that my 86" 65' with a hack (and too light of flywheels) would spin a "5"-plate assembly until the steel plates burnt into a 'rosette' pattern, like flower petals. Twice.
Instead of ordering new, I hurriedly stuffed in some fat fossil friction discs and rust-pitted steels out of 'the Pit', but no spring plate since you can't hear a grunch through the aluminum casting anyway. They are still in there years later (on a second motor!).

Either styles of covers will accomodate any clutch pack. Ignore the book measurement and strive for a pressureplate that fully disengages parallel with a minimum travel of the clutch arm, with free play upon the throwout bearing. Its easy.

PS: If you are running a belt, you will probably only find "5" packs for dry service.

Post Reply

Return to “Clutch”