I've just passed my SVA for which I had:

- about 3 turns of TRE toe out

- front springs up fairly high

- the adjustable shocks set to the 8th softest click (out of about 23) all round

- tyres at 20psi

- camber is more or less vertical (as measured with a block of wood and a spirit level - nothing fancy)

Like that it seemed like I had to make quite a conscious effort to get the steering to turn - nothing dangerous, it just didn't have very quick reactions

Since SVA, I have wound down the springs so the TREs are more or less level, and wound the TREs in to have 2 turns of toe in. In this setup, the steering seems a bit twitchy, i.e. wanders when I don't want to turn.

I could just set it up so I have less toe in, but I was looking for opinions and what other people have done in terms of camber, toe in, springs, shocks, tyre pressures, etc. (front and rear if different).

FYI, at SVA the axle weights with nobody in the car were 270kg front and 288kg rear, if that makes any difference?

Thanks in advance

[Edited on 21.10.2005 by Humbug]

[Edited on 21.10.2005 by Humbug]

I have my tracking set parrallel (only with the string round car method at home!), Camber set at 1 - 1.5 degrees neg , dampers 7of 23 front , back 4 or 5 of 23 , tyres about 18 psi , the car can still be a bit nervous over uneven surfaces but overall not bad............

[Edited on 21/10/05 by Surrey Dave]

off the top of my head for a non-specific car surrey dave's setup would be my start point, sounds about right on everything.

Thanks Dave. I'll try these settings out.

btw, I am sure that it's mentioned somewhere else on the forum, but humour me and tell me which way does negative camber lean? In at the top of the wheel or out?

Cheers

quote:

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Originally posted by Surrey Dave
I have my tracking set parrallel (only with the string round car method at home!), Camber set at 1 - 1.5 degrees neg , dampers 7of 23 front , back 4 or 5 of 23 , tyres about 18 psi , the car can still be a bit nervous over uneven surfaces but overall not bad............

[Edited on 21/10/05 by Surrey Dave]

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http://www.answers.com/topic/camber-angle has a clear diagram and some discussion on camber.

Top in is negative.

I have zero camber, and zero toe-in, and it works well for me. However, a suspension book I have (written by Des Hammill, I think) recommends 1 degree negative camber and 1 degree toe-out for seven-style cars.

Although the toe-out sounds wrong, it's supposed to assist turn-in on corners. The down-side is that the more toe-out you have, the more 'exciting' the car will be under severe breaking. That's what the author says, anyway - I can add no comment except that I haven't tried these settings!

rgds,
David

quote:

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Originally posted by David Jenkins
...Although the toe-out sounds wrong, it's supposed to assist turn-in on corners...

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It's something to do with assisting the ackerman angle that most cars don't have properly set up!

At this point I bow my head and admit ignorance of car geometry...

David

interested in this this string around car method of setting track,can anyone explain?

I was always taught that basic tracking set up was as follows:

Rear wheel drive cars:
0 - 1 Deg Toe Out.

Front wheel drive cars:
0 - 1 Deg Toe In.

String method


Wrap a piece of string round all four wheels on the C/L of the wheel. Measure the gaps between the string and the front tyres (Either at the front of the wheel or the back but the same place each side) add the measurements of each side together and divide by 2. You can then use Trig to work out the tracking angle.

Try lowering the tyre presure on the front to 16 psi put 18psi in the rears.

Always adjust the toe setting after setting ride height and camber.

RWD car parrallel or slight toe in on front
Fwd cars should normally toe out on front.

At rear IRS always set up with a slight toe-in unless using semi-trailling arms then set up with lots of toe-in.

Front camber for road use -0.5 to -1.5 degrees for track use -1.0 to -2.0 degrees.

quote:

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Originally posted by BKLOCO
I was always taught that basic tracking set up was as follows:

Rear wheel drive cars:
0 - 1 Deg Toe Out.

Front wheel drive cars:
0 - 1 Deg Toe In.

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Bugger......

I just read my post and realised I got it completeely the wrong way round.

My excuse is I had just finished a week of early shift and was "dog tired" (no pun intended).

Thanks for pointing out my error Rorty LOL