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Belt drive conversion
ettore bugatti - 8/3/11 at 09:55 PM

Hi,
Im currently involved in a Yamaha R1 conversion into a Mini, it is a front wheeldrive setup.

The idea is to use a belt drive instead of a chain.

Now, I have found that it would be possible (in theory at least).

So where could I find pullies that gives me a ratio of about 2.7, that takes the same place as 14/38 tooth sprockets for a chain drive.
I would like to use a pitch of 14mm.

I recon that a 1.5" belt would be wide enough, or should we go wider?

Thanks!

[Edited on 8/3/11 by ettore bugatti]

[Edited on 8/3/11 by ettore bugatti]


matt_gsxr - 8/3/11 at 10:08 PM

What about the kind of kit they use on massive superchargers. I mean proper dragster blowers, some of those draw big power.

http://theblowershop.com/category/23


designer - 8/3/11 at 10:15 PM

American bikers use wide belts, search in the US.


tegwin - 8/3/11 at 10:15 PM

Soemthing like this would work...
http://www.bearingboys.co.uk/14M_Taperlock_Timing_Pulley-1808-c

But why would you want to? They can be noisier, ideally need a tensioner on them to compensate for heat stretch....


hillbillyracer - 8/3/11 at 11:26 PM

I'd be looking for people who deal power transmission systems for industry, there is a massive range of stuff available to transmit the drive from electric motors etc to where it needs to be on a machine.

I know for example there's an agricultural grass mower called a Kidd Clipper that uses to two toothed belts to drive two 1.2m cutting drums, not unlike a car timing belt but mabye 100mm wide!


MikeRJ - 9/3/11 at 09:18 AM

quote:
Originally posted by tegwin
But why would you want to? They can be noisier, ideally need a tensioner on them to compensate for heat stretch....


And can snap without warning if you get a stone caught in the pulleys, and availability of spares will be very poor compared to a chain and sprockets. The lower maintenance (whilst still in one piece!) is really the only thing going for them.


coyoteboy - 9/3/11 at 11:19 AM

Chains are remarkable devices when you come to look at it.


ettore bugatti - 9/3/11 at 01:47 PM

Thanks for your inputs!

The goal is to be different, however the following advantages are interesting:

-Belts have a constant power lose during their life span. whereas a chain take more power as miles are piled on
-Belt drive system is lighter
-Belts last longer than chain
-Belts don't need lube
-Belts are positive drives and don't have annoying chain snatch

Anyone experience with Gates Poly Chain GT2?


tegwin - 9/3/11 at 03:50 PM

No chain snatch?!?? You get elastic retardation instead from the belt...

Lighter?!?!? Unless you get bespoke alloy pulleys I suspect you will end up with stonking heavy steel pulleys.... much heavier than their "sprocket" equivalant.


Not trying to ruin your fun, good to see something different...


T66 - 9/3/11 at 05:51 PM

How short are you planning on the belt being ?


A V8 with a top mounted blower still has a decent run of belt between centres, in a fwd engined Mini surely the belt will have to be tiny?


MikeRJ - 9/3/11 at 06:05 PM

quote:
Originally posted by ettore bugatti
Thanks for your inputs!

The goal is to be different, however the following advantages are interesting:

-Belts last longer than chain



Under ideal conditions, maybe