Rear Suspension

[metalguru]

I am designing a front engined racing sports car using a 502ci chevy and intend using a jag rear diff.

I need rear uprights that can connect to the Jag diff and use fabricated double wishbones.

What do the various Cobras use?

Thanks for any help

[Adrian472]

Try kirkham motorsports there original spec billet uprights and driveshafts will work with jag irs diff and tubular wish bones.
www.kirkhammotorsports.com
or
www.cobraracing.com

or

concours west industries they build custom rear ends based on jag and 9" centres


Adrian

[Adrian472]

www.erareplicas.com build a custom jag based rear end for there cobra with a cast upright using tubular wishbones try them, here is a direct link to the correct web page.

www.erareplicas.com/427/frssusp.htm

Also you could weld a alloy lug to the top of the normal jag rear upright housing to form a top link pick up point it has been done before

i hope all this helps

Tell us more about your project, is this going to be some kind replica or something completely fresh?

Adrian

[Adrian472]

www.erareplicas.com/427/frsusp.htm corrected link

Adrian

also found www.cwiinc.com

[mylesdw]

These folk to a sort-of true unequal length double wishbone setup using sliding driveshafts and the original Jag upright modified for an upper pick-up point.

http://www.race-car-replicas.com/JaguarXJ13.html

That ERA version in the link above looks a bit of a hybrid; it still uses the driveshaft as the upper wishbone but adds an upper radius rod moving in quite a different axis.

[metalguru]

Thanks for all the help. I'll go look at those sites. I dont want to try the welded lug onto the jag upright, though.... not with 540hp to play with!

This is the start of a new sprint hillclimb project for me. My last car was a modprod Scimitar with the cosworth quad cam engine and very little actual scimitar left in it. Won a few championships with it.

I bought the big engine to go into a modprod corvette I was planning, but the chassis body I bought proved to have a completely knackered chassis. This left me with the option of buying a new corvette chassis or trying to rebuild the old one. Neither option was attractive so the project stalled for a coupla years.

I have long thought that the wings and aerodynamics fitted to most racing cars are basically useless unless you can set them up properly in a wind tunnel. (like building double wishbone suspension and having no idea how it should be set up). I also think that aeordynamic drag is of little consequence if u hv plenty of power and most sprints hillclimbs are pretty low speed anyway.

So.... I hv decided to build a naked 2-seater front engined chassis with no bodywork to save weight. I will use the same front suspension geomtery I used on the scimitar and add IRS with double wishbones in place of the scimitar's solid axle. Cortina front uprights will be used but I had not worked out what rear uprights to use. Now you guys have solved that little puzzle!!

[Cobra289]

Nice information guys!!!
Perhaps..........

Regards,
Cobra289

[dave]

GD Have a rear upright that they use on their Euro chassis that uses double unequal length wishbones.

[neil still building it]

and.....what about the 84 on vette rear ends,ALL ALLOY AS STOCK??!
they must be getting fairly cheap now ,as they're getting long in 't' tooth?
only a guess mind! or perhaps thats NOGOOD!???
neil

[metalguru]

Looks like GD Euro uprights are the thing we need.

£167 each... not tooo bad.

Jag diff is dirt cheap and plentiful. Blow it up... replace it real easy. The motor makes 545 bhp, so the diff is gonna suffer :-}