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Old 03-11-2008, 03:20 PM   #1
dg_performance
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Default New clutch slips at 5lbs?

Just got a new clutch installed in my ej20 wrx.
It is a 6 puck rated for 320hp give or take.
It is really grabby and engauges hard from a dead stop in first gear as i would think it would be.
My problem is that it starts to slip at 5psi already and i am not getting on it just easy cruisin with a little roll on of the throttle.

Is this normal for break in time.... i only have 50 miles on it?
thanks.
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Old 03-11-2008, 03:37 PM   #2
dg_performance
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forgot to mention this is an older 95 with cable clutch so it is not hydrolic!
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Old 03-11-2008, 04:14 PM   #3
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There is no break-in for a clutch,and slippage will eventually glaze the disc and ruin it. You could have an adjustment problem like no free play,or preservative grease might not have been cleaned from the pressure plate or flywheel,or other possibilities. Don't allow slippage until this is sorted out.
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Old 03-11-2008, 04:21 PM   #4
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Quote:
Originally Posted by kimball View Post
There is no break-in for a clutch,and slippage will eventually glaze the disc and ruin it. You could have an adjustment problem like no free play,or preservative grease might not have been cleaned from the pressure plate or flywheel,or other possibilities. Don't allow slippage until this is sorted out.
Way to spread mis-information. There IS A BREAK-IN for clutches, it is typically 200-300 miles which generally calls for no launching and limited throttle, though no launching is generally enough.

Also OP can you link to which clutch? Most 6 pucks are rated for 400+TQ.
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Old 03-11-2008, 05:43 PM   #5
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I don't know much about racing clutches, but I have installed several hundred street clutches. A clutch that is designed for the engine's torque output should not slip when new.
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Old 03-11-2008, 06:23 PM   #6
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^^ the break in period in not so it doesn't slip. It is so the disc wears into (mates) both the flywheel and pressure plate, thus seating fully. Not riding on a high spot on the disc... should there be one.
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Old 03-11-2008, 06:42 PM   #7
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it's the same concept as new brake pads and rotors
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Old 03-11-2008, 06:49 PM   #8
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No break-in is needed with puck clutches AFAIK.
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Old 03-11-2008, 09:50 PM   #9
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No break-in is needed with puck clutches AFAIK.
you can't neccesarily make a blanket statement like that. Break-in procedures whether there is one or not really depends on the clutch material, which can be different on any given clutch type given it be full face/segmented/pucked
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Old 03-12-2008, 11:41 PM   #10
dg_performance
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The shop told me to see what happens after 400mi and go from there so i am not gonna get all worried till i have some miles on it and give the break in period a chance to work?
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