Quarter Master® Top 10 FAQ

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This FAQ contains the most frequently asked questions about Quarter Master™ products. If you have a specific question that you cannot find an answer to, please call Quarter Master™ directly at 888-CLUTCH-1, or visit the Tech Support section of the Quarter Master™ web site.


1. How do you measure driveshaft c to c distance?

Raise the car off the ground. Make sure to put jack stands under the rear end so the suspension is still compressed. Take the slip yoke that you will be using for this driveshaft and slide it into the tailshaft of the transmission until it bottoms out. Then slide it back out ¾ to 1 inch, this will be the free play that all driveshafts need when the suspension travels. Carefully measure the distance between the centers of the front and rear U-joints. Double check the ¾ to 1 inch freeplay in the front slip yoke, and measure again just to be sure. Round off your new measurement to the nearest ¼ inch increment. This is the length that your new driveshaft will have to be made to.


2. How much clearance should you have between the cover spring and the face of
the bearing?

There should be between .100” and .150” of clearance.


3. What size master cylinder is recommended for the hydraulic bearing?

A 3/4 inch master cylinder is recommended.


4. What are the torque specs for cover bolts?

20 foot pounds.


5. How much is the step on the flywheels?

.100”


6. What are the spring pressure and color codes?

		GREEN 1,500 - 1,700 force lbs.
		TAN 1,700 - 1,900 force lbs.
		ORANGE 1,900 - 2,100 force lbs.
		YELLOW 2,100 - 2,300 force lbs.
		GREY 2,300 - 2,500 force lbs.
		BLUE 2,500 - 2,700 force lbs.
		WHITE 2,700 - 3,000 force lbs.

7. What's the maximum warp in hard parts?

The maximum warp for hard parts is O.OO6”.


8. What are the clutch horsepower ratings?

They are 300 foot pounds per disc. If it’s a three disc clutch, it would be rated at 900 foot pounds.


9. What is the maximum wear on friction discs?

Maximum wear is 0.010” on .105” thick discs, and .025” on .250” thick discs.


10. Can you run 24 volts through a Quarter Master™ starter?

Yes.