14in sae 2 clutch torque rating

Daniel McCurdy

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Does weight effect how much torque these clutch can handle. I found one rated at 1400 torque but I imagine that's at 60k lbs. In a 8000 pickup would that clutch be able to handle more torque like between 1800-2000 lbs
 

u2slow

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Here's my thinking:


Torque is rotational force. To realize the full effect, the object acted on needs to resist, push back, absorb etc.

If at 600#ft you blow a ujoint or axle shaft... or the tires just start peeling out, you can't really build much torque to throw down. Nothing to 'push' against.

That's where the weight comes in. If that load prevents you from losing traction (and you don't break things) now you can build torque.

IMO, the clutch rating is the rating. It doesn't change based on the weight of the rig.
 

Daniel McCurdy

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Thanks that's also what I was thinking. Will be putting a cummins to a rto6610 in a 93 ford. So the max torque the engine can make is 1400ft lbs as that's the highest rated 14in clutch I could find.
 

Steven66

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Does weight effect how much torque these clutch can handle. I found one rated at 1400 torque but I imagine that's at 60k lbs. In a 8000 pickup would that clutch be able to handle more torque like between 1800-2000 lbs
The weight does affect it. Hard to measure, but transmission, axle, clutch torque capacity ratings are all set with a certain vehicle/load weight in mind. Lowering that weight does increase the torque capacity of the driveline parts.

Case in point, this is why you aren't seeing people put T56 transmissions behind big trucks. Yes, the T56 is rated at 700 ft/lbs, but that's considering a vehicle weighing about 3000-3500 lbs (no idea what Tremec actually sets their weight rating at). You put that in a 10,000 lbs truck pushing 700 ft/lbs and you'll start breaking input shafts.
 
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