'94 clutch vs. '86 clutch

[LuckyVette]

First off, I drive an '86 4+3 coupe as my daily car. Last week I test drove a '94 six-speed and noticed a tremendous difference in the feel of the clutch. The six speed was very tight and took more force to push it in with my foot and more force to keep it on the floor. When I got back in my '86 it felt easier to push with not as much kickback.

Does anyone know the difference between the clutches of these two transmissions?

Thanks

 

[Ken]

1987
CLUTCH (MANUAL TRANSMISSION):

• Make, type, engagement: Borg & Beck, hydraulically activated slave cylinder, automatic adjustment
• Assist: No
• Type pressure plate springs: Bellville
• Total spring load: 2300 lb
• Number of clutch driven discs: One
• Clutch facing material: Non-asbestos
• Clutch facing manufacturer: Valeo
• Clutch facing part number: F-202
• Clutch facing rivets/plate: 32
• Clutch facing outside and inside diameter: 10.75" x 6.5"
• Clutch facing total effective area: 53.4 sq in
• Clutch facing thickness: 0.305"
• Clutch facing engagement cushion method: Driven plate, cushion springs
• Release bearing type and method of lubrication: Ball thrust, prepacked and sealed
• Torsional damping method: Coil springs and metal-to-metal friction

1994
CLUTCH (MANUAL TRANSMISSION):

• Manufacturer: Valeo Clutches and Transmissions, Inc.
• Clutch type: 280mm pull type, dry clutch, magnesium housing
• Clutch linkage: Hydraulic pre-filled
• Maximum pedal effort, depressed: 40 lbs.
• Maximum pedal effort, released: 30 lbs.
• Assist: None
• Type pressure plate springs: Diaphragm
• Total spring load: 2383 lbs. (LT1), 2638 lbs. (LT5)
• Clutch facing manufacturer: Valeo
• Clutch facing material code: F-202
• Clutch facing material: Non-asbestos, woven
• Clutch rivets per facing: 18
• Clutch facing outside and inside diameter: 11.02" x 7.09"
• Clutch facing total effective area: 56 sq in
• Clutch facing thickness: 0.13"
• Clutch facing engagement cushion method: Cushion springs
• Release bearing type and method of lubrication: Angular contact ball bearing
• Torsional damping method: Dual-mass flywheel (non-dampened clutch disc)

As for why it feels different, I'll leave that to someone else to explain. I can't.

 

[bradfordsvettes]

Ken you are a wealth of knowledge you make me jealous at times you sure know the details Steve :eek :BOW

 

[Ken]

Thanks Steve, I'm just tryin' to help.

But, I must give credit where credit's due - to Mike Antonick for use of the information found in the Corvette Specs book. Thanks Mike!

_ken

 

[LuckyVette]

Man, I was afraid someone would reply with a response like 'cause the 6 speed clutch is better..."

I'm an engineer, so those specifics are awesome.

Thanks, Ken