MB
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| posted on 11/11/02 at 09:21 PM |
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Tiger Avon twin bike engine car
Just got hold of a copy of "How to Build your own Tiger Avon Sports Car" - excellent book better than Haynes Make one for £250!
Its got a section (very very brief) on using bike engines. Apparently Tiger have a couple of models that use twin bike engines that are incredibly
fast... sounds slighly better than my X-flow - but how does this work - surely bike engines incorporate a gear box which is an easy installation for
one engine, but what happens with two of these things?
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Liam
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| posted on 11/11/02 at 09:30 PM |
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Well, you need another gearbox (from the likes of Quaife) that combines the outputs of the two bike gearboxes and connects to a single propshaft. It
might even offer a reverse mode if you're lucky. Last time I checked these boxes weren't much cheaper than one of the engines - dunno what's
available now though. Then you need to make a linkage that changes gear on both bike boxes simultaneously.
Or if you're really adventurous you turn the front engine round and make it 4WD. As far as I know only Tiger have done this and broke some records
with it too.
Liam
[Edited on 11/11/02 by Liam]
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interestedparty
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| posted on 12/11/02 at 08:32 AM |
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If you want super quick 0-60 then you simply have to do the 4wd version. Next question, is it worth it? Like most record attempts, if the record is
your only goal then yes. If you also want a road-worthy car that won't require constant attention, continuous setting up, clever and expensive
electronics etc etc then don't even think about twin bike engines
John
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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Cousin Cleotis
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| posted on 12/11/02 at 06:30 PM |
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the twin bike engined 4WD tiger was on 5th gear ages ago, it did 0-60 in 2.8sec not much quicker than single bike engined 2WD cars.
[Edited on 11/12/02 by Cousin Cleotis]
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david walker
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| posted on 12/11/02 at 07:29 PM |
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All the twin bike engined sevens have been built by my good friend Chris Allanson who's business is called Z-Cars. He's based on the Yorkshire east
coast. Chris was the developer of the twin engined cars used in Autograss since '95 and now so commonplace in that sport. His main area of business
remains within that sport.
The first two sevens were actually converted Westfields, both using ZX9R engines and were rear wheel drive. The first of the Tiger cars he built was
also RWD. They used a collector gearbox (two props in, one out, incorporating reverse made by another Autograss supplier GB Engineering, to Chris'
design.
The current, and record breaking 4wd design uses two fuel injected ZX12 engines, one driving the front wheels and one driving the rears, both through
Cossie diffs. The engines are bog standard. Reliability is excellent.
The cars incorporate, traction control, launch control and just about everything else. O to 60, yes a single bike engine is nearly, but not as quick
but 0 to 160 no chance. These things do 0 to 100 and back to 0 in under 10 seconds!
By the way current price is £40,000. They are not aimed at the Locost market!
Dave Walker, Race Engine Services - 07957 454659 or 01636 671277
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donut
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| posted on 12/11/02 at 07:39 PM |
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One of those twin jobbies is owned by my friend Simon Ranson who incidently did all the drawings in the Avon book. His twin is rear wheel drive only
and doed 0-60 in 3.11 secs. He has promised me a ride when he gets it back on the road after a gearbox service.
Can't wait!!!!!
Andy
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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