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Soc
 Post subject: Motorcycle Engined Mini
PostPosted: Sun Jul 10, 2005 8:08 pm 
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848cc
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Location: Canberra
i'm in the design stage of a bike engined mini.

I've got the bike engine downstairs, funnily enough, in my old bike :) It's a bandit 1200, it's not a bad lil engine, lots can be done to them to spark em up, so it's a decent base to work from. and it's torquey ;)

Quick questions tho:

It'll be rear wheel drive, and I had originally intended to kinda run chain drive directly to the rear wheels, HOWEVER, dad's shot me down repeatedly going "Oh, without a diff, you'll schred tires!" and I'm not rich enough to knowingly destroy tires, just because i couldn't design in a diff.


So, questions.

Anyone seen a bike engined mini before?

Anyone know of a small (physically) diff? something with a decentish 1 to 1 ratio? (bikes got a 5 speed box)

Anyone got anything i didin't think of? it's a racecar at the moment, not caring to much about getting it road legal. :P that'd be the next step.

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Mini Mad
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PostPosted: Mon Jul 11, 2005 6:15 am 
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http://www.zcars.org.uk/mini/mini-single.htm

You can buy a kit from the UK to do this ;)

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Soc
 Post subject:
PostPosted: Mon Jul 11, 2005 8:06 am 
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848cc
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Heh.
I don't have quite 4600pounds. :P

Plus, I've already designed the exact same chain driven rear end, and I've got a mate who could machine up the centre peice for next to nothing for me, but my design doesn't have a diff....

gargh.

Stupid tyres. :P

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dansedgli
 Post subject:
PostPosted: Mon Jul 11, 2005 8:46 am 
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848cc
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Your tyres wont be too bad, plenty of people drive heavier cars with a mini spool which does the same thing. Getting it passed an engineer to be deemed road legal might be difficult though. Im not sure if they would accept it. As a race car the chain would be fine.

The diff and axles would be pretty expensive to get done.
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Baracade
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PostPosted: Mon Jul 11, 2005 10:53 am 
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So what happens about reverse?

For a car to be road legal it needs to be able to go in reverse ... i don't know much about bikes... but bikes cant go backwards can they?

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benjamin
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PostPosted: Mon Jul 11, 2005 11:01 am 
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some bikes have a reverse gear i think or maybe its only the honda goldwing

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Mini Mad
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PostPosted: Mon Jul 11, 2005 11:04 am 
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Goldwings can ;)

Most i've seen rig up something so that they have all forward gears in reverse :shock: insane...

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drmini in aust
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PostPosted: Mon Jul 11, 2005 12:42 pm 
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Those bike engined race cars here (what are they called?) have a starter motor driving teeth on the LH rear disc, to get a `reverse'... 8)

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9YaTaH
 Post subject: Aussie Legends
PostPosted: Mon Jul 11, 2005 12:51 pm 
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drmini in aust wrote:
Those bike engined race cars here (what are they called?) have a starter motor driving teeth on the LH rear disc, to get a `reverse'... 8)


quite agricultural but it works....so long as the battery is healthy if the engine has stopped going around....

I would get in contact with your local Uni and ask if anyone in engineering is involved with the SAE program...they use chain drive, I think to a differential....

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Soc
 Post subject:
PostPosted: Mon Jul 11, 2005 9:34 pm 
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http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 27689&rd=1


That would be GREAT! however, i'd need the rest of the diff :D

anyone got bits? :p

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manofaus
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PostPosted: Mon Jul 11, 2005 9:48 pm 
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how are you going to drive two indepentant wheels? You would need uni's or c'vs and this is expensive. If your mate is a machinist he could whip up a special housing to retain all the bevel gears.
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Soc
 Post subject:
PostPosted: Mon Jul 11, 2005 9:54 pm 
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848cc
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Current ideas have changed to:

Motorcycle engine and sprocket down to another larger sprocket, which drives a shaft connected to a conventional car diff, which drives the wheels.

Yeah, I know CV's might get a bit expensive, but hey, they're pretty much a requirement :)

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Mini Mad
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PostPosted: Mon Jul 11, 2005 11:53 pm 
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drmini in aust wrote:
Those bike engined race cars here (what are they called?) have a starter motor driving teeth on the LH rear disc, to get a `reverse'... 8)


Aussie Racing Cars I believe...

They lap wakefield in 1:06.. 8)

http://www.aussieracingcars.com.au/

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willy
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PostPosted: Tue Jul 12, 2005 12:06 am 
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Goh! HFS those chicks are mad. :shock:
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aussie
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PostPosted: Tue Jul 12, 2005 12:13 am 
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yer saw those aussie racing cars at the clipsal. Apparently all the ones there were meant to have a metal 'seal' sorta thing so the engine can not be tampered with so they are all the same.

funny thing though that when we looked at the winning cars engine there was no metal seal on the engine :?
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