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post #1 of 12 (permalink) Old 08-21-2008, 10:05 PM Thread Starter
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Big motors and stock clutches?

Ok I just want to see who out there is building big or high hp motors and using stock clutch setup? I have a pdm but want to try and see how a bigger motor would run with stock clutches.My question is what spring ,wieght rollers,size of motor and what rpm it runs wonder how long a belt is going to last I put together a 760 with a epi severe duty belt a brand new wet clutch a kms sheeve with 12 gram rollers and a pdm purple spring suppost to be same as a orange epi it turns 7600rpm on the street it will puff a pretty good smoke cloud out of the clutch front tube on hard take off just wondering who out there has ran a clutch setup like this don't want to go to the dunes and burn a belt up in a few hours?

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post #2 of 12 (permalink) Old 08-21-2008, 10:50 PM
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sorry kob I just dont get it. if you have a pdm clutch there's no need to play with the wet clutch weights and springs. you can tune a wet clutch all day long and it won't compare to a dry clutch because of the slippage you will still have with it. a dry clutch transfers much more of the hp to the ground.

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post #3 of 12 (permalink) Old 08-21-2008, 11:47 PM Thread Starter
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This is true I know. I just want to get a feel for how they will do I have built a few big motors here in oregon all have had pdm's It would be easier to sell a motor job if they could buy the motor and see if the stock clutches will work for them then to factor in another $1400 dollars for a clutch on top of the price of building a motor I know Brian from aci has built quite a few stock clutch motors that run dam good I have even had him do a setup for a turboed rhino we did at the shop I just can't sell that to a customer unless I have ran that setup and seen how it went. Got to keep the customers happy.
Also here in Oregon we don't do a lot of wide open running we play quite a bit a Idle speed through trails and beach grass and a pdm isn't real friendly on the slow uphill starts kind of to positive of an engagement. Always trying something new to suit our needs.

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post #4 of 12 (permalink) Old 08-22-2008, 06:59 AM
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oh i see, makes sense now. yea droppin another $1,400.00 was kinda tough pill to swallow for me too. btw your avatar is fuckin killin me

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post #5 of 12 (permalink) Old 08-22-2008, 07:26 AM
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post #6 of 12 (permalink) Old 08-22-2008, 08:15 AM
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Quote:
Originally Posted by King of Bling View Post
Ok I just want to see who out there is building big or high hp motors and using stock clutch setup? I have a pdm but want to try and see how a bigger motor would run with stock clutches.My question is what spring ,wieght rollers,size of motor and what rpm it runs wonder how long a belt is going to last I put together a 760 with a epi severe duty belt a brand new wet clutch a kms sheeve with 12 gram rollers and a pdm purple spring suppost to be same as a orange epi it turns 7600rpm on the street it will puff a pretty good smoke cloud out of the clutch front tube on hard take off just wondering who out there has ran a clutch setup like this don't want to go to the dunes and burn a belt up in a few hours?

The only thing you did not mention was the internal wet clutch springs and weights. did you have those also? 7600 rpms seems very safe to me for that motor BTW.

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post #7 of 12 (permalink) Old 08-22-2008, 08:44 AM
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After spending way too much money on all of this the only advantage of keeping the wet clutch that I can see is engine braking and belt life.
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post #8 of 12 (permalink) Old 08-22-2008, 08:45 AM
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We ran a silver spring with 14 gram wieghts and it turned 7100 and ran 73mph.When we would set it up for short course we would put in the 12 gram wieghts but then we would start burning up belts after lenght of time.
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post #9 of 12 (permalink) Old 08-22-2008, 09:09 AM Thread Starter
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We ran a silver spring with 14 gram wieghts and it turned 7100 and ran 73mph.When we would set it up for short course we would put in the 12 gram wieghts but then we would start burning up belts after lenght of time.
What motor was that on and how long would belts last?

Thanks Robert

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post #10 of 12 (permalink) Old 08-22-2008, 09:11 AM Thread Starter
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The only thing you did not mention was the internal wet clutch springs and weights. did you have those also? 7600 rpms seems very safe to me for that motor BTW.

Rog
No, the wet clutch is completly stock I didn't decide to do this till a couple days ago I was going to us the pdm.

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