Where can i find a proper IRS?

i believe some kit cars have true IRS, maybe use one of these as a donor...

seriously though, what do you mean by proper IRS? you almost certainly wont find a donor that you can simply bolt it off and bolt it onto the kit. most people who use IRS have made top and bottom bones, and a hub carrier, and use sierra parts to finish it off.

Couple builders have used the entire rear sub-assembly from the MX-5.

T

Some Tiger cars and Robin Hood cars use the complete rear subframe/diff/driveshatf/trailing arm assembly from the Sierra. Even then I believe you have to modify the suspension pick-up points and method to use coilover shockabsorbers.

You could have a look at the book "How to build a Tiger Avon" to get an idea of how to fabricate an IRS set-up for use with Sierra components.

HTH

Nick

"You could have a look at the book "How to build a Tiger Avon" to get an idea of how to fabricate an IRS set-up for use with Sierra components. "


look at it, see the shortfalls and design something better - it would not be difficult!

ok, thanks for your help.

I know the 3 series BMW IRS has been adapted for use on triumph stags,not sure if its too awkward for kit building.

The sierra rear end is a bit of a mess if used in its entirety,i'm sure this is why upper and lower wishbones are used along with bracketing on the chassis for the diff,keeps the weight down too.

I used the MX-5 as a donor, as did Bob C. Have a look at his archives for a good example.

My work can be seen here. Exactly the same as Bob Cs but with inboard dampers. The bits are perfect for a locost and are very light.