jk
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 posted on 9/12/05 at 04:52 PM |
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DIY IRS chassis
Am swaying towards making my own chassis- no probs with technical aspect and i reckon (after reading around) that the satisfaction factor will be
pretty good.
Thing is, i'd like to do the 442 version (that is 4 longer, 4 wider and 2 taller, right?) but must have IRS, and pref double wishbone- i know
GTS do plans for w7de but i'm not too interested in de dion.
Anyone know of any plans/advice?
This site is seriously addictive.
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Viper
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| posted on 9/12/05 at 04:56 PM |
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http://www.mcsorley.net/locost/
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jk
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| posted on 9/12/05 at 04:59 PM |
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hmm i'm aware of the mcsorley plans but they're live axle.
Don't know why i'm set on bones- Is there anything wrong with de dion?
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CommanderAce
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| posted on 9/12/05 at 05:03 PM |
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de dion, it lighter then IRS, simpler, probably cheaper too, its what I'm going for. There are some good plans for them too, Rorty released some
about a month ago
Roads? Where we're going we don't need roads!
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scotty g
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| posted on 9/12/05 at 06:56 PM |
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I'm going with the GTS de-dion, its so easy mate, keep it simple. Cheers
Scotty G.
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flak monkey
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| posted on 9/12/05 at 06:58 PM |
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The Rorty plans are hosted on my site. They are for a standard track car.
You will find a lot of people going for De Dion now as its so easy.
David
Sera
http://www.motosera.com
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Bob C
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| posted on 9/12/05 at 07:23 PM |
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Rorty also did wishbone IRS plans based on Sierra mechanics. I did wishbone IRS based on mx5 uprights for my build but that's on a standard
sized car. You're welcome to copy my setup (click the www button below) though you'd want to change some stuff for a wide car. In spite
of what folk say the wishbone version isn't too hard esp. when someone's been down the route before & debugged it! The de-dion is only
easier if you get one ready made I reckon!
When I asked if anyone had measured their unsprung weight with bathroom scales recently, another sierra based IRS builder came in at the same as me
(31kg per back corner) but no live axle or dedion builders shared their final results, but the consensus seemed to be that dedion would be generally 1
to 3kg more & live axle 15kg more (I'd still like to see some measurements!).
Also my setup has not been driven yet so I can't make any claims for its dynamics. Quite a few builders have copied the Tiger Avon back- end,
but I didn't like the look of it. The MK indy also has sierra based IRS so you should be able to find enough photos on here (and obliging
builders with tape measures) to do a reasonable chinese copy of that.
cheers
Bob C
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scotmac
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| posted on 9/12/05 at 07:46 PM |
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Was there supposed to be a link in that post Bob? Or am i just going blind (probably)!!! 
Oh, i see the VERY small www below the posts!!!
[Edited on 9/12/05 by scotmac]
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flak monkey
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| posted on 9/12/05 at 08:01 PM |
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quote:
Originally posted by Bob C
Rorty also did wishbone IRS plans based on Sierra mechanics.
Yes the ones on mys ite are designed for sierra running gear. But are for a standard width chassis. Its no problem to adapt them to suit a +4 car
though!
David
Sera
http://www.motosera.com
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907
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| posted on 9/12/05 at 10:20 PM |
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Hi jk,
You'd be more than welcome to look at mine. It's 4" wider than most.
Oooer, perhaps I should start this post again. 
Hi Bob,
What happened to all those weights?
I reckon they broke their scales.
Paul G
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caber
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| posted on 9/12/05 at 10:29 PM |
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There are plans in the book build your own Tiger Avon Sports Car including details of fabricated rear uprights. I have been around this loop and have
ended up back at a live rear axle. Should be easier and quicker to build for a first time effort, that's what i thought anyway!
Caber
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rusiq
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| posted on 9/12/05 at 10:45 PM |
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Ford Sierra/Merkur Based IRS Drawings. Download CAD files.
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Mix
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| posted on 10/12/05 at 04:06 PM |
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Don't be swayed by the DeDion mob, most of their advice / experience is based around buying a De Dion set up off the shelf. If you intend to
build it yourself and are prepared to do the research then I think IRS is probably just as easy.
In fact probably easier from the point of veiw that;
most of us don't have the facility to form the DeDion tube,
DeDion has very little in built adjustment so tolerances during manufacture are more critical
IRS has more componenents but they tend to be smaller and hence more manageable in the garage.
As long as you're prepared for the build to take a little longer then there is no reason not to go IRS.
Mick
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kb58
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| posted on 10/12/05 at 04:51 PM |
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Also there's the overlooked issue of camber compensation. The De Dion acts just like a straight axle in turns, with the outside tire wearing
more on the outside edge. IRS fixes that (or CAN fix it.)
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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Hugh Paterson
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| posted on 10/12/05 at 09:53 PM |
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Now u got me thinking Caber..... methink's
a direct comparisson between the three chassis/cars were building might be in order. 1.Live axle 2. IRS (Sierra or bmw) rear 3. Inboard
coilovers/suspension front and rear for my own car. Pity the powerplants are all going to be different then it really would be interesting. All we now
need is three drivers the same weight and were cooking! Lead ballast or beer to compensate Whats it going to be
regards
Shug.
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Triton
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| posted on 10/12/05 at 10:35 PM |
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DD axle is easy to make, cut n shut the tube don't bend it.
My Daughter has taken over production of the damn fine Triton race seats and her contact email is emmatrs@live.co.uk.
www.tritonraceseats.com
www.hairyhedgehog.com
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NS Dev
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| posted on 10/12/05 at 10:37 PM |
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quote:
Originally posted by CommanderAce
de dion, it lighter then IRS, simpler, probably cheaper too, its what I'm going for. There are some good plans for them too, Rorty released some
about a month ago
De dion, in my opinion, is the optimum setup for these cars........which is a shame as i am building wishbone irs!!
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CommanderAce
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| posted on 10/12/05 at 11:55 PM |
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quote:
Originally posted by NS Dev
De dion, in my opinion, is the optimum setup for these cars........which is a shame as i am building wishbone irs!!
Doh! *head smacking action*
Roads? Where we're going we don't need roads!
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NS Dev
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| posted on 11/12/05 at 11:53 AM |
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Yep!!!
Long story.........wanted the cateringvan-esque look. Wanted to buy a fair bit of it as I have too many other things on the go to make everything.
Stuart Taylor car fitted the bill on those points........but he only does live axle or wishbone IRS.
Thought about buying a live axle "kit" and converting to de-dion, but really wanted to keep as much as poss off the shelf to minimise
build time.................................I have now reengineered so much I might as well have built from scratch!
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Viper
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| posted on 11/12/05 at 12:32 PM |
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quote:
Originally posted by NS Dev
Yep!!!
Long story.........wanted the cateringvan-esque look. Wanted to buy a fair bit of it as I have too many other things on the go to make everything.
Stuart Taylor car fitted the bill on those points........but he only does live axle or wishbone IRS.
Thought about buying a live axle "kit" and converting to de-dion, but really wanted to keep as much as poss off the shelf to minimise
build time.................................I have now reengineered so much I might as well have built from scratch!
i know exactley how you feel mate.
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caber
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| posted on 11/12/05 at 09:08 PM |
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Shug, I have 2 Pinto 1600s and I think another was offered on the twin engine thread! We could start with these, you will need to put on a fair bit of
weight to catch up with me, I think a diet of 5 pints and 3 curries a night between now and the end of build might just do it all we need is a third
volunteer, Actually Oli has a 1600 in his car with a stock sierra back end and would only need 1 curry a night to catch up on the weight stakes. . . .
That would also mean 2 Edinburghers versus one Wegie to add to the competitive aspect .....
Caber
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Hugh Paterson
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| posted on 11/12/05 at 09:40 PM |
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Arghhhhhhhhhhhhhh
He called me a Wegie....now thats fighting talk We meet at dawn on the Hill (Knock) As the saying goes "a Glasgow funeral is the same as an
Edinburgh Wedding" You ever seen what happens when the welding flaw in a bottom wishbone gives out as yer flying through Clark??
Shug.
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NS Dev
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| posted on 11/12/05 at 11:23 PM |
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really does annoy doesn't it, that feeling of......."well, it should be ok, but I wouldn't have done it that way, much better this
way...........won't take many hours to remake it nicely"
DOH!!!!!
Sometimes I think ignorance is bliss..........wish I was better at ignorance!
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