My donor car is a Mk3 Toyota Supra.
I'm using the front wishbones in all the stock locations, but the rear is a multi-link setup that I am changing to double wishbones.

To make sure I don't bugger it up the roll-centres etc, I drew up String Computer, as per Alan Staniforth. It's not all that accurate though, and a pain to use.

What sort of software is available to do the same job.

I have downloaded the QBasic software from Racetech Magazine (http://www.racetechmag.com/user/software/software.asp?menu=4), which would be fine, apart from the measurements being all imperial and I grew up on metric.

Are there any other programmes out there that people have used?

It is one big compromise!

I read a lot around here.
I read the book from http://www.amazon.co.uk/Modify-Sportscar-Kitcar-Suspension-Speedpro/dp/1903706734
then in 3D looked what happened.

So first try to understand it,
then come to the conclusion that most kit-cars geometry is no good. But hey they drive also around very fast, so be

Then make your own,
- Most of the steering forces will be compensated in the tyres
- the lack of movement in the suspension (about 4-5 inches) is also one thing to consider.

Try to get your cambergain under control.
Try to get no bump-steer
try to get enough caster

My wishbone ratio is upper/lower front 0.79.

Good luck



[Edited on 8/6/07 by t.j.]

http://www.andersensmith.freeserve.co.uk/suspension.htm

I used solidworks to check that my wishbone length and mounting positions would give me the correct camber gain/loss. The first picture shows non-parrallel unequal wishbones at normal ride height.
The second and third show the camber gain and loss. In reality this will be minimal on my car as the wishbones will not normally go that far, but I will be using adjustable height air shocks.
My ride height will be adjusted from 3"-6" at the touch of a switch and can even be lowered to 0" when parked.
Like it has been said, suspension is a compromise. I have designed mine at 3" ride height as at 6" it will only be used to get over obstacles/speed humps etc.


Description


up

[img][/img]

http://www.racingaspirations.com/suspensiongeometry.php

Cheers
David

quote:

---

Originally posted by Minicooper
http://www.racingaspirations.com/suspensiongeometry.php

Cheers
David

---

Use this software.

shame that link above doesnt let you include the kingpin angle, or let you type figures in. Several ways round the KPI though.