Project GatTagO

iTrader: (7)

I was just wondering if any of your roadracers are interested in a lightweight flywheel and clutch assembly. Anyone currently using something like that?

Andrew

DavidNJ

I use a Quartmaster 5.5 3-disc button clutch and flywheel on own SBC oval track late model. And that is backed up with a tranny with no first gear, 36# crank, 515gm rods with Honda journals, 370gm pistons, 89gm pins. Heavy quick change though.

Lightweight internals appear to be a rare item here.

DONAIMIAN

iTrader: (18)

I think McLeoud and Tilton both make stuff for the LS1's.

steve-d

iTrader: (7)

Depends on how lightweight you want to go. The tilton 5.5 and 7.25 clutches won't hack it at all on the street. In fact, you shouldn't even drive them onto a trailer. Too much slipping in that short distance. You'll ruin it. Engage it ASAP. Fully. Period.

I have a dual duty street / road race course (track days) car. '02 TA. I use a Fidanza Alum FW with a Spec stage 2+ lightweight clutch. Wherever you can reduce rotating mass on anything that spins or moves (crank, drive shaft, wheels, pistons, valves & etc) will allow the car to go faster. You just have to select parts w/in your anticipated area of use.

Steve

DavidNJ

Supras use Tilton 3-disc carbon and other multi-disc carbon clutches on the street. The non-carbon wouldn't last a week on the street. And we winch on on and off the trailer.

Project GatTagO

iTrader: (7)

I am posting this with Tony's (Nine Ball) blessing.

This is really just to gauge interest for a somewhat streetable, great open track day clutch package. Here is something that was put together by Quarter Master:



The flywheel is a one piece design, very similar to the flywheels that Quarter Master builds for Nextel Cup cars. It is billet steel, hardenend and weighs about 12 pounds. The clutch is 8.5 inches in diameter with 2 disks. The disks have solid hubs and what Quarter Master calls their Rally friction material. It is much more forgiving than sintered iron. Total weight of the flywheel and clutch is about 22 pounds.

Please ask whatever questions you might have.

Andrew

CTSmechanic

iTrader: (2)

[QUOTE=DavidNJ]I use a Quartmaster 5.5 3-disc button clutch and flywheel on own SBC oval track late model. And that is backed up with a tranny with no first gear, 36# crank, 515gm rods with Honda journals, 370gm pistons, 89gm pins. Heavy quick change though.

What type of trans?

jcarp

I use an 8.5 dual disk Clutchmaster with an 8 lb flywheel on my BMW. I LOVE it on the track as the winds up so fast, but the take up is less than an 1", and the car pulls no vacuum at idle so it is bitch to drive on the street.

We're dropping a LS1 into the car right now and I bought a SPEC clutch with an AL flywheel as a starting point, but that looks like an interesting option.

DavidNJ

CTSmechanic: GM 4-speed with 1st removed. M21 I think. Uses a three lever shifter: 2nd, 3rd and 4th, and reverse. Entire race including start in 4th. 6.03 overall ratio at my main track.

Andrew,
BTW, how much? Do they have a carbon version? At 22# with the smaller diameter, it could be worth 5-10hp.

Project GatTagO

iTrader: (7)

Gentlemen,

I can't really talk about pricing since we are not a sponsor. Keep in mind that these cluthces are fully rebuildable. There are service parts available that will allow a rebuild for a couple of hundred dollars, depending how how wear there is in the floater and pressure plate.

There is also a 7.25 diamater 2 and 3 disk carbon/carbon that will be hitting the shelf in about a week. Quarter Master currently has a 4.5 CC and a 5.5 CC that are used extensively in all forms of road racing including the SCCA World Challange. The 7.25 CC will actually be very streetable and our first package with that clutch is for the EVO. Many others are in the works, and if there is enough interest we will make an LS1 7.25 flywheel.

Keep the ideas coming guys.

Thanks for all the input.

Andrew

roy

Hm,
I guess i can shelve the idea of the Porsche GT Clutch. This looks to be more in my price range. I sure did want to try the PCCB material.

DONAIMIAN

iTrader: (18)

http://www.mcleodind.com/cgi-bin/fcc...ostname=MCLEOD
Thats the McLeod set up. I was told its fairly bolt in and go with the LS1's and worked with the factory hyd. system. I was also told that you could get more street friendly friction disc and it came in closer to 10lbs. If you could get something competitive with that I would be in.

Project GatTagO

iTrader: (7)

I am sorry, the link takes me to the main McLeod catalog page. What setup are you talking about?

Andrew

Project GatTagO

iTrader: (7)

I think the Porsche GT uses a carbon/carbon clutch. What is the PCCB material? BTW, you can get Quarter Master products in Europe through Demon Tweeks and a few other distributors.

Andrew

jrp

iTrader: (16)

whats the holding capacity?

Speedpup

Looking for 7.25 QM please send price and all details. I guess I need a pedal stop. Any ideas on that or do you have something made up. Thanks!

Project GatTagO

iTrader: (7)

The conservative torque rating on the 2 disk 8.5 is about 800 lb/ft.

Andrew

Speedpup

$$$$$$$$$ please even a rough one for all parts to install.

Project GatTagO

iTrader: (7)

I am sorry. I can't post prices here because we are not a sponsor. You can call our main number for part number and go through one of our dealers to purchase.

For a pure race application you can get what is called a button flywheel. A button flywheel is a small flywheel without a ring gear that bolts to the crank and provides a friction surface. You would sandwish an automatic transmission flexplate between the crank and the button flywheel strictly for starter engagement. Actually for a pure race application you would use a 3 disk 5.5" clutch unless your rules have a 7.25" clutch minimum.

There is actually a package of parts that will bolt right into a C5. You will need a pedal stop for sure.

Andrew

Speedpup

You are from QM? I think I may have spoken to you a month ago I had the part numbers and got a price from Oval Speed near me. I need to find them and get some stuff going for spring. Performance difference in the button FW vs. 8.5. This is a new product not available a month ago?