66 427-425hp Clutch Info.......

[Larry S.]

I am going to replace my clutch in my 1966 427 as it chatters (also turn flywheel, new pilot and throwout bearing too). I am considering either a Sachs or a Valeo 11" clutch assembly. Has anyone had any experience with either unit? Any other thoughts?

[Larry M.]

Re: 66 427-425hp Clutch Info.......

I am going to replace my clutch in my 1966 427 as it chatters (also turn flywheel, new pilot and throwout bearing too). I am considering either a Sachs or a Valeo 11" clutch assembly. Has anyone had any experience with either unit? Any other thoughts?

Larry:

Most folks I know install the LUK Rep Set. We can provide part numbers if needed.....or check the archives. Others report excellent results with CenterForce II.

Larry

[Ken A.]

Re: 66 427-425hp Clutch Info.......

Sachs makes a heavy duty clutch for this app that, although expensive, will out perform anything out there. The part # is K552-03HD & I would buy a new flywheel. As much work as you're doing, I would only want to do it once.

[Joe L.]

Re: 66 427-425hp Clutch Info.......

Sachs makes a heavy duty clutch for this app that, although expensive, will out perform anything out there. The part # is K552-03HD & I would buy a new flywheel. As much work as you're doing, I would only want to do it once.

Ken-----


The problem is that "heavy duty" clutches often come with heavy-duty pedal effort. That is usually a negative unless one uses the car for the kind of driving for which that kind of clutch is beneficial.

[Michael G.]

Re: 66 427-425hp Clutch Info.......

Ken-----


The problem is that "heavy duty" clutches often come with heavy-duty pedal effort. That is usually a negative unless one uses the car for the kind of driving for which that kind of clutch is beneficial.

Quite satisfied with my LuK Pro Gold HD in my '66 427 from Carolina Clutch.

Chevy LuK Pro Gold Heavy Duty RepSet Stock Heavy Duty Chevy GMC Pickup Replacement Kit Part No: 04-902

[Robert K.]

Re: 66 427-425hp Clutch Info.......

I just pulled the Sachs clutch out of my 1985 CJ7 Jeep, nope not a Corvette. The rivits that hold the springs on the disc pulled through the backing. I guess that 258 6 cylinder was too much for it. Anyone seen anything like this before?

The best clutch ever made for this application was made by GM. It was the L88/ZL1 10.5 diaphram clutch.

[Ken A.]

Re: 66 427-425hp Clutch Info.......

Ken-----


The problem is that "heavy duty" clutches often come with heavy-duty pedal effort. That is usually a negative unless one uses the car for the kind of driving for which that kind of clutch is beneficial.

Joe, obviously you haven't driven a MY Corvette with this clutch. I have and am very happy with the pedal effort, about the same as a normal clutch, and especially the lack of slippage with a 427. If you speak with a Sachs tech rep, then you can find out his suggestion for the type of clutch you need for your application, and they have a warranty.