DAN57
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| posted on 9/10/05 at 10:13 AM |
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Sierra IRS
Hi to all.
I am new to the locost thing and building my first car. After doing lots of research I decided to build the GTS chassis to use single sierra donor and
keep things simple. Or so I thought.
Ive just started to build the rear section but the suspension mounts appear to be the same as a "book" chassis indicating the use of an
escort axle and not IRS. Am I wrong?
I found some Sierra IRS plans from GeorgeCushing.net. Should I use these instead?
Any help and suggestions gratefully received after all I could just be reading the plans wrong.
Cheers
Dan
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flak monkey
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| posted on 9/10/05 at 10:17 AM |
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Welcome to the nut house 
The rear mounts are the same as the book car yes, because the GTS cars uses a de dion axle that all the parts from the sierra IRS fit into.
So its not IRS or live axle. But it does use all of the IRS parts from the sierra without modification.
David 
Sera
http://www.motosera.com
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DAN57
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| posted on 9/10/05 at 10:43 AM |
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Ah ha! I see the marketing ploy now.
Ithink I may use the gts rear shell for the possibilty of fitting their panels and fit the GoergeCushing suspension and diff mounts. After all his
plans seem very good.
Thanks for clearing that up.
Dan
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britishtrident
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| posted on 9/10/05 at 12:26 PM |
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De Dion is the best way to go
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DAN57
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| posted on 9/10/05 at 03:42 PM |
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I think after looking at flak monkey's web site I think you're right De Dion is probably best and easiest, although I did want to try to
make as much as possible to keep with the Locost idea. But hey £150 is not expensive and it wont go far without suspension.
Thanks Guys
Dan
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Ben_Copeland
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| posted on 9/10/05 at 07:45 PM |
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Hi Dan, I do work for GTS from time to time and the cars are dead easy to put together.
Whereabouts in kent are you?
The De-deon axle is very good, dont hessitate to ask any questions if you get stuck.
Ben
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DAN57
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| posted on 9/10/05 at 09:22 PM |
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Hi Ben,
I'm on the Westside in Tonbridge, prob an hour or so drive from you. (Depends what you're driving I suppose.)
I am thinking the gts De-Dion is the easier and most logical solution, after all if everything comes from one place it should fit like dream ish.
The only downside being that their website seems to be falling apart I cant seem to get many pics and the pdf's dont seem to work. Could be my
pc though.
Thanks for the offer on questions I'm feeling very welcome here.
Dan
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Ben_Copeland
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| posted on 10/10/05 at 05:54 AM |
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Just let me know by email or U2U and i'll see what i can get you. Picture wise.
I'll be ringing Darren later so i'll see what i can get, the website is a problem, but best to just ring him anyway. The workshop is in
Longfield near Ash/Dartford area so you can always arrange to go see him there.
I was right by you at the weekend looking for a car for my mother... spooky  lol
[Edited on 10/10/05 by Ben_Copeland]
Ben
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Ben_Copeland
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| posted on 10/10/05 at 06:28 AM |
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Theres a picture of the De-dion axle on his website, found that.
I've got PDF of the chassis design if you need it.
Ben
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paul v6
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| posted on 10/10/05 at 07:47 AM |
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Hi Ben,
I'm about to start building and would really appreciate taking a look at the pdf files of the gts chassis
Many thanks
Paul
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Ben_Copeland
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| posted on 10/10/05 at 07:50 AM |
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I've only got a basic pdf of the back end. It's not the one he has. but it'll get u going
Ben
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paul v6
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| posted on 10/10/05 at 08:16 AM |
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Hi Ben,
I think I have that pdf already but thanks for the offer
You may be able to point me int the right direction though!! I have the Mcsorely book chassis plans, aussie mod bracing plans and the GTS de dion back
end plans. I have noted dimensionally these plans are all compatible with one another so expect things to work out ok. With your experience do you
think this should work out???
Many thanks
Paul
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Ben_Copeland
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| posted on 10/10/05 at 08:48 AM |
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The GTS locost is based on the orginal locost, so is the mcsorley plans, so I should think they'll be just fine together. Theres no reason why
the GTS back end shouldn't be fine for any locost.
I did email you the pdf always
Ben
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paul v6
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| posted on 10/10/05 at 09:35 AM |
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Thanks Ben
Much appreciated!
Paul
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mk1fiesta
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| posted on 10/10/05 at 11:20 AM |
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Sierra IRS
Hi, after finding not much info on plans for the irs I forked out for an MK rear irs. It cost £500 but its a work of art. It came with the wishbones
and uprights and starts from the rear bulkhead behind the seats. Its an expensive option but an option.
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DAN57
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| posted on 10/10/05 at 08:09 PM |
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Ben,
That is spooky! Lucky you were'nt buying from me
I have plans for the rear chassis section (if thats the one that comes with the plans from GTS) Talking of which I didnt realise they were so close.
That'll save a few quid on postage. (After all it is supposed to be Locost.) Thanks for the pic Ben, it helps when you can visualise
something, and it all becomes clear.
As for the MK rear end, although full irs would be nice like flak monkey says you only have 2-3 inches suspension travel so will the gain be that
apparent? (Not that I know just what I read.) Interesting to know though. I have not seen the MK chassis. Maybe worth a look if only to be nosey.
Dan
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flak monkey
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| posted on 10/10/05 at 08:22 PM |
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I did say that, and I still belive it. However you may notice the difference on the track if you are planning to use the car for track days. How much
of a difference I am not sure. However a poorly set up IRS system will give you far worse handling than a well set up de dion system IMO.
You would probably be better off saving the money and sticking an LSD a de dion set up than fork out for the IRS set up.
All IMO
David
Sera
http://www.motosera.com
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Ben_Copeland
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| posted on 10/10/05 at 08:26 PM |
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I've got a LSD for mine
I will use the GTS de-dion when i change from Escort Live axle to sierra back end, so easy to change it.
Dan, i'll give ya a shout when i'm next going to a locost meeting, convoy if ya like.
Ben
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DAN57
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| posted on 10/10/05 at 08:40 PM |
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Going off at a slight tangent and almost hijacking my own thread. I'm fitting an LSD into my Merc and this has an electronically controlled
acumulator to engage/disengage the diff. The sierra one is obviously not like this???
Sorry to hear about the pug 406 Ben. I worked on one a while ago that did the same and made cambelt jump. Changed the belt and all was ok. Fingers
crossed.
A locost meet would be great, a chance to let myself know what I am getting into.
Dan
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Ben_Copeland
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| posted on 10/10/05 at 08:53 PM |
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Its ok, it's not mine
I drive a built proof Nissan Navara
Sierra Diff is defo not like that lol far to complicated for ford lol
Ben
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Ben_Copeland
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| posted on 10/10/05 at 08:54 PM |
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Well if your ever in the Margate/Broadstairs area let me know and you can see what you've let yourself in for lol
Ben
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kango
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| posted on 11/10/05 at 03:46 AM |
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So has anybody got some drawings of the DD bracket. Something I can give to an engineering shop and they can make it for me.
I have red the treat on the manufacturing of a DD bracket some time ago, but it stopped after everybody critisised the 12 mm boiler plate flanges.
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Ben_Copeland
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| posted on 11/10/05 at 05:53 AM |
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Something Like that
Its a bit big so follow the link to it :
http://www.locostbuilders.co.uk/upload/suspension%20mounting.gif
I have no idea who it belongs to, but you get the rough idea
[Edited on 11/10/05 by Ben_Copeland]
Ben
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kango
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| posted on 12/10/05 at 04:19 AM |
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Thanks Ben
Is there an assembly drawing, of the whole thing.
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Ben_Copeland
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| posted on 12/10/05 at 05:31 AM |
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Check out my Photo Archive, I've made a folder with some diagrams in.
No idea were they came from, so dont rely on them totaly
[Edited on 12/10/05 by Ben_Copeland]
Ben
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