AndyGT
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| posted on 24/7/08 at 01:11 PM |
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Differences between Haynes Roadster and RC Book Locost
As title really, the main dimensional differences between the Haynes Roadster and uncle Ron's Locost chassis.
Also if anyone has a pdf/jpeg (scanned image) of the dimensions of the Haynes Roadster that would be great!!!
Just bought a Haynes Roadster chassis and will be using the Escort mk2 as the donor car and wanting to know the basic problems I am likely to see
relating to dimensional differences?
May end up buying a book too in the near future if there are considerable differences...
Thanks in advance
Andy
nothing is impossible
everything is possible
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speedyxjs
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| posted on 24/7/08 at 01:13 PM |
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Roadster is +442 (4 inches wider and longer and 2 inches taller)
You should get the book anyway or you could run into some problems
[Edited on 24-7-08 by speedyxjs]
How long can i resist the temptation to drop a V8 in?
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D Beddows
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| posted on 24/7/08 at 01:19 PM |
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Dimensional differences are one thing but you do realise that the Haynes Roadster chassis is IRS (sierra diff and driveshafts) and the book Locost
chassis is live axle (eg escort axle) don't you?
Suppose you could turn the Roadster chassis into a live axle one but it would involve reworking the back end a bit.......
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nick205
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| posted on 24/7/08 at 02:31 PM |
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Other than the engine and gearbox from the Escort, you're going to need all the other bits from a Sierra.
Better off selling the Escort to someone building a live axle locost and sourcing a Sierra donor for your build.
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AdamR
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| posted on 24/7/08 at 03:36 PM |
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quote:
Originally posted by speedyxjs
Roadster is +442 (4 inches wider and longer and 2 inches taller)
You should get the book anyway or you could run into some problems
[Edited on 24-7-08 by speedyxjs]
Are you sure? I thought it was 2" wider and 1" taller.
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MikeRJ
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| posted on 24/7/08 at 03:58 PM |
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The Haynes Roadster is definately +2" wider, which is a bit annoying as it's another variant for bodywork. It also means that the
driveshafts need to be shortened, which isn't required on a +4" car.
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James
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| posted on 24/7/08 at 04:02 PM |
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Agreed: 2" wider and 1" taller.
Hadn't read about the drive shaft cutting.... why on earth do you have to do that?
Andy,
As the others have said.... there's very little point in using a Roadster chassis and then not using the IRS!
Buy a Sierra donor if you stick with this chassis.
HTH,
James
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"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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MikeRJ
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| posted on 24/7/08 at 04:20 PM |
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quote:
Originally posted by James
Agreed: 2" wider and 1" taller.
Hadn't read about the drive shaft cutting.... why on earth do you have to do that?
It's possible my memory is playing tricks as it's a while since I've looked at the book, but I'm sure I recall Chris
mentioning that the driveshafts needed 10mm taken out of them.
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MikeR
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| posted on 24/7/08 at 04:25 PM |
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chris made a mistake in the book and it means the drive shafts either need to lose 1" (approx) or extend the wishbones an inch ....
hmmm, wonder which i'd do and which chris recommends?
(Chris if i've got that wrong please accept my apologies and correct me)
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Neil P
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| posted on 24/7/08 at 05:43 PM |
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It's 10mm out in the plans. The wishbones need lengthening to compensate. There are some amended plans on the forum.
I did mine to standard size as I have been on with it a while. When I realised I just added a 10mm spacer to the outside of the rear upright. I
couldn't face the pain of re-doing those 'bones.
Neil
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MikeR
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| posted on 24/7/08 at 07:34 PM |
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whats a few mm's between friends? 
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chrisg
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| posted on 24/7/08 at 09:18 PM |
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There are modified drawings on the forum to use standard length driveshafts and if you have a recent book they've been changed since the second
reprint, and all the errors on the PDF should have been corrected.
Buy a book mate.
Please.
My granny needs an operation.
Or something. 
Cheers
Chris
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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Triton
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| posted on 25/7/08 at 12:00 AM |
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We just happen to do a 10pce grp set especially for the Roadster...
Mark
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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