What are the advantages/disadvantages of going with a twin disk setup over a single disk? Also is it worth changing the flywheel at the same time?

 

Reduces heat and that equals a longer life. You also have twice the friction surface which equals better clamping power. You already have a twin disk setup stock.

 

Hi Spencer

The stock clutch in a base, GS, and Z06 is a single disk unit. The stock clutch in the ZR1 is a dual disk unit.

The dual disk is usually used where more clamping power is needed to transmit higher horsepower/torque. You're putting out a lot of power and might well benefit from a dual disk clutch.

if I were looking to upgrade to a dual disk clutch in my DSOM Z06 I'd definitely go with a ZR1 clutch in the package from Katech. For the ZR1 clutch you need a new flywheel, and the Katech package includes an aluminum one.

Here's a link to their LS9 clutch package:

http://store.katechengines.com/ls9r-...-z06-p241.aspx


Call Jason at Katech if you have any questions.

Bob

 

Thanks Bob! Not sure what brand it will be but I left it up to The Vette Doctors to decide. Carmen said that he will install a dual disk clutch, new flywheel and new slave cylinder (whatever that is lol). It was fairly embarrassing lining up a E-town Raceway park and launching directly up to 7K RPM and staying there, two times in a row, though being able to drive the car fine when not on the track. I would like to be able to use my power when called on after all..........weird phenomenon I say.......

 

I just picked up one of those Katech packages. I be putting it in in the next few days. I've heard nothing but really good reviews on this setup.

BJK

 

Hmm, when I looked at my stock clutch, LS3 it sure looked like a twin disk setup. Maybe as well as buring it up I also split it. Anyway I have the Katech LS9x in it now and could not be happier.

 

RPS twin carbon, i love it, it does make a slight rattle, buts thats ok, why? because race car.

zr1 clutch is slient

 

The Katech package includes a new slave cylinder, or actuator. Take look at the picture below - #25 is the actuator (slave cylinder), #1 is the master cylinder, and #26 is the clutch fluid reservoir that you see in the engine compartment.

You can see the bleed nipple on the actuator, and you can only get at it to bleed/flush the clutch hydraulic system by removing the catalytic converters and the tunnel plate - that's why we all do the Ranger method of keeping our clutch fluid clean.

However, if Carmen has everything apart for the clutch install, that would be the perfect time to install a remote bleeder valve so you can do a proper clutch fluid flush without taking the car apart.

Bob

 

Is it possible to do a clutch yourself on jack stands or is this a shop only job?

 

Love my Exedy GT04XD Twin Plate and I don't baby my car.

 

I dunno - I've never done a clutch job on a C6.

However, I think you need to get it higher than jackstands.

The Service Manual says "remove the driveline support assembly with the transaxle", i.e. the torque tube/driveshaft and diff. It goes on to say that to remove the bellhousing bolts "the upper bolts can be accessed by lowering the engine cradle approximately 25mm (1 in) and tipping the engine back".

So, it's a pretty big job to get inside the bellhousing so you can remove the pressure plate and disc. Maybe if you've got real tall jackstands the car would be high enough to lower the diff down enough to pull it aft enough for the front end of the drive shaft to clear the bellhousing and remove the torquerube/transaxle from the car.

I think I'd like a lift and a good transmission jack.

Bob

 

You can do it on the floor with jackstands. May want to do it in pieces instead of a whole unit. Rear cradle, diff, trans then torque tube. The zr1 clutch is nice. I have done several and they hold well and feel good. Tested up to 700 rwhp so far personally.

 

Absolutely! I've done 3 clutch jobs and drop a motor in on my C5 Z06 on jack stands. C6's are easier because you don't have to drop dif and trans and torque tube too much to get to the clutch.

To answer the question above ZR1's are the only Corvette that come from the factory with an twin disk clutch

 

Yes, I did this 2 weeks ago. Took me 3 real long days. A shop manual is a must. You will need a good quality trans jack. The hardest part of the job is insuring that the diff, tranny and torque tube don't twist when you remove the assembly. If it does it is really a bear to line back up when reinstalling. Jakcs required IMO.

Hydraulic trans jack - cheap jack will not do. Best if you can build a custom cradle to insure the assembly does not twist.

2 Hydraulic floor jacks - used for lifting and lowering cradles.

4 stand tall jack stands. I have 4 10,000 lbs units that can be rasied to over 2ft. For this job they are raised to 19 inches. I built U-blocks out of wood to go over the jaws of the stands. These are located at the four outside jacking locations and I did not use my hockey pucks.

2 bottle screw jacks. One for tilting the engine cradle back and the other to help support the torque tube. It would be great if the one supporting the torque tube was on wheels.


You will need a wobbly socket attachement and be prepared for 3 bolts that are a bear to work with. I spent an hour on one bolt as there is not a way to get a socket on it and you only get 1/8 turn with a wrench.

In a 1 out of 10 rating this is a 10 to do it yourself. But now that I have done it and with what I have learned I would do it again.

 

Gurus, quik question on the LS9 Katech clutch assembly: is it heavier in total than a stock clutch assembly for an LS3?

 

I did not wieght the entre assembly. Shipped wieght was 66lbs. That includes fluid, gaskets, remote bleeder, pilot bearing and slave cylinder. Maybe 15lbs top for that. The flywheel is 18 lbs lighter than the stock flywheel. The pressure plate though is heavier, but I did not wiegh it. It is also 1 inch less diameter than the stock cluthc if I remember correctly.

 

Katech says their overall assembly is eight pounds lighter than the Z06 assembly and that the aluminum flywheel weighs 12 pounds.

BJK

 

Here's a link again to Katech's site with info about it, I you didn't see the link in my previous post:

http://store.katechengines.com/ls9r-...-z06-p241.aspx


They say their LS9 clutch package is 8 pounds lighter.

Bob

 

Wow... I like doing things DIY, but this sounds like a little too much! Id have to spend a fortune in additional jacks, tranny jacks, building a cradle, etc... and 3 days I really wouldnt have!

What is the price range most will shops charge to install a clutch?

 

10 hour labor according to the book.

About a $1,000 labor.