XTR2 Question
07 May 2003, 10:24 PM
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How does the XTR get it's power to the rear wheel? A quick look at the photos make it look like there's is some kind of chain driven transaxle. Anyone know who makes this (or similar things?)
08 May 2003, 03:07 PM
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AFAIK the XTR2 uses a Westfield designed rear axle doofer to work with the bike engine's chain drive.
Quaife do make proper transaxles to do the job as used in the Radical but they cost £££'s (or more likely ££££'s).
Quaife do make proper transaxles to do the job as used in the Radical but they cost £££'s (or more likely ££££'s).
08 May 2003, 08:50 PM
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Yep - The XTR2 uses chain drive 16T front sprocket 47T rear sprocket mounted onto a Quaife ATB slipper diff.
This is a good thing for the following reasons:
* Chain efficient - hardly any power lost from flywheel to wheels.
* Chain drive v light
* Chain drive easy to switch ratios
Against
* Chain lasts about 1000 miles
* a little bit of work when starting with a new chain as it stretches a little to begin with.
The chain that is used is either DID X-ring or equiv O-ring chain - same size as normal Hayabusa chain but with about 75 links. A Very very strong one too.
The westfield uses an electric system for reverse...we don't have this on our car as the motor isn't going to pull you out of the kitty litter and it weighs 17kilos - quite a bit for a car that in total tips the scales at 481kilos.
PowerTEC and Quaife are the company that produces the system in the Radical SR3
It is quite expensive (approx £2,700 i think) but it offers probably a more robust solution for bike engined cars, on the downside it weighs about 50kilos...and its not quite as easy to switch out the ratios.
I'm happy with our chain system - grasstrack cars have been doing this for years so its pretty reliable if done properly.
Ian.
Ps - you may which to check out http://www.xtr2.net/ to get more info
[Edited by igratton - 5/8/2003 8:57:33 PM]
This is a good thing for the following reasons:
* Chain efficient - hardly any power lost from flywheel to wheels.
* Chain drive v light
* Chain drive easy to switch ratios
Against
* Chain lasts about 1000 miles
* a little bit of work when starting with a new chain as it stretches a little to begin with.
The chain that is used is either DID X-ring or equiv O-ring chain - same size as normal Hayabusa chain but with about 75 links. A Very very strong one too.
The westfield uses an electric system for reverse...we don't have this on our car as the motor isn't going to pull you out of the kitty litter and it weighs 17kilos - quite a bit for a car that in total tips the scales at 481kilos.
PowerTEC and Quaife are the company that produces the system in the Radical SR3
It is quite expensive (approx £2,700 i think) but it offers probably a more robust solution for bike engined cars, on the downside it weighs about 50kilos...and its not quite as easy to switch out the ratios.
I'm happy with our chain system - grasstrack cars have been doing this for years so its pretty reliable if done properly.
Ian.
Ps - you may which to check out http://www.xtr2.net/ to get more info
[Edited by igratton - 5/8/2003 8:57:33 PM]
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