Author Topic: Clutch options  (Read 3992 times)

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Offline bimmerbaz

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Clutch options
« on: April 13, 2011, 09:15:09 pm »
Hi Guys,
Just looking at some options for a clutch in a mower build.

Option 1 use the conventional belt system with a v belt

Option 2 use the same as above but use a multi rib belt for more grip (like an auto belt)

Option 3 use the centrifical clutch (not my fave choice due to little engine braking and no control)

Option 4 use a motorbike clutch and adapt to make work either on RAGB or rear axle.

My current perfered option is to use motorbike clutch (multiplate) on RAGB then run auto cambelt pullys and belt from engine to RAGB. This would have no slip at all and give precise clutch control.
 I have seen this done on some of the UK mowers and just wondered if any one else has done it as well.
Im open to thoughts and suggestions. Obviously our racing and rules are much different to yours so what works over there may not over here.

Baz  8)
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Offline Tony Loveless

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Re: Clutch options
« Reply #1 on: April 13, 2011, 11:18:08 pm »
I use the v-belt system and I know alot of guys build their own clutches.  What I use though is the stock clutches off the Murray Widebody's.  The belt guides are already there and there is minimal fabricating that has to be done to it.  I have great clutch and haven't had any problems out of any that I have used. 
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Offline mowinmachine

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Re: Clutch options
« Reply #2 on: April 14, 2011, 12:03:39 am »
 Not sure what's available to you all in NZ but I use a titan centrifugal clutch and its fantastic. There are 3 sets of springs used for various engine speeds. These are a heavy duty clutch made for more horsepower. I've run the same titan clutch for 3 years and there is barely any wear on the pads. These are made in the US so you might be having to pay a lot for shipping.
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Offline Bolens16

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Re: Clutch options
« Reply #3 on: April 14, 2011, 06:57:25 am »
Hey Baz. Don't know how you will get on running a bike clutch dry or would you use the clutch off that funny looking English box you have that runs dry.
If it has blades I'm not interested.

Offline bimmerbaz

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Re: Clutch options
« Reply #4 on: April 14, 2011, 10:17:17 pm »
Not sure what's available to you all in NZ but I use a titan centrifugal clutch and its fantastic. There are 3 sets of springs used for various engine speeds. These are a heavy duty clutch made for more horsepower. I've run the same titan clutch for 3 years and there is barely any wear on the pads. These are made in the US so you might be having to pay a lot for shipping.

How do you find the engine braking, if you lift off into a corner ? and then do you have a delay when reappliying power like other clutches?

Cheers

Baz  8)
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Offline GTX21

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Re: Clutch options
« Reply #5 on: April 15, 2011, 09:57:30 am »
If the engament springs are a lower rpm, then you dont have to worry about the clutch engage and disengaging when entering a corner
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Offline mowinmachine

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Re: Clutch options
« Reply #6 on: April 15, 2011, 10:48:54 am »
 Yup. I have mine set to engage at around 3000 RPM. All you do is let off the gas and it disengages.
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Offline bimmerbaz

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Re: Clutch options
« Reply #7 on: May 04, 2011, 09:58:36 pm »
Thanks for ther info guys.

When we race somtimes the engine rpm can drop almost to idle on sharp hairpin corners. So looks like the centrifical clutch might not work for me. I am gunna have a play with a motorbike clutch pack that i got for a good price (free). Will keep you posted if your interested.

Baz 8)
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Offline Tony Loveless

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Re: Clutch options
« Reply #8 on: May 04, 2011, 10:05:01 pm »
Sounds like the centrifigul clutch would be what you would want to me.  This way you keep your rpms up.
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