Front camber

[woodman]

i would be grateful for some advise on following;

at present i am running with 1 degree on one side and 1/2 degree on other side on list 1a bridgestone re720 tyres.

Should i have more camber and if so how much?

approx how much does one turn of a std top ball joint alter camber?

if i increase camber will the new setting be ok for radial slix?

regards

stu hill

[Richard M Green]

Stu,

The centres ball joints on standard suspension are 220mm apart, and the top ball joint thread is M18 x 1.5.

Now according to what the nice Mr Eccles at The Vyne School taught me: Tan theta = opposite/adjacent.

Thus change in theta for one turn = Tan-1(1.5/220) or  0.4°.

I wouldn't dream of giving you advice on actual camber settings on the grounds that I've never managed to come close to your times.......

......but the Green/Dean Racing SEW is set to -1.5° camber, and I believe that some people run -2° with List 1A tyres.

Can't help on the radial slicks question though. Would the manufacturer's Racing Dept offer any advice I wonder?

HTH

See you at Wiscombe?

[Kev Bamber]

Hi Stu, I currently run 2 deg neggy. how does you car turn in & handle at the moment? - if you need to dial out some understeer I've found up to 2 1/2 degrees assists turn in. Anything beyond that is ineffective.

If you are happy with the handling, leave it, if you want to improve the turn-in, wind a bit more on.

For our live axle cars, there is very little you can do to alter the rear grip other than springs & shocks (& tyres/TP's), so one that is nailed, make sure you have 3/4" rake on the car, then dial the front grip up or down using camber, toe-in, roll bar until it's neutral (unless you're Tim N, then you set up for wild oversteer)

Start point for set-up:-

3/4" rake to front of car, with front lower wishbones horizontal or slightly higher at inboard than wheel end.  

1 to 2 Deg Neggy

A Gnat's knob of toe out (2mm)

... oh & a bit less timber on the car, you are the only person I know who needs to Cuprinol the car rather that Waxoyl it

Kev.

[Toby Mack]

rake? is that another name for trail?

[Blatman]

I didn't think so.

Rake is the difference in height between the front and rear of the car....

I'm more familair with the term trail as it's used to describe the fork geometry on a motorbike. The nearest thing to that on a car would be castor...

[woodman]

Thanks Richard for the calc, so its 0-4 per turn, so i can equal out my settings for a start

re wiscombe ,i have entered but am on reserve list, but fairly hopeful of a run

Kev ,thanks for info ,but what is rake?

see you at ty croes on fri

stu

[Blatman]

Read the post above your last one, where it says

Rake is the difference in height between the front and rear of the car....

See you at Wiscombe, hopefully...

[Rob Navin]

Stu

I would recomend that you put adout 45 degrees neggy on the drivers side and 45 degrees positive on the passanger side.

At least for any events I am booked in for

                             

Rake is something you use to collect leaves in to a pile with

HTH

[Buzz Billsberry]

Rake is something you use to collect leaves in to a pile with

What's a 'pile with'??

Buzz