Track car - toe and camber settings....? [Archive]

cliokongen

21-04-2009, 10:05

What is your preferred settings for a Williams/Hybrid?

I prefer a good amount of camber to suit the R888's and 0 deg. toe.
I mostly use the car for track days.

Camber: ?
Toe: ?

Michael

Adi82

21-04-2009, 10:16

For my next outing on track I will be using about -2 degress camber and around 15 - 20 mintues toe out. Might also try and find a way to shim the rears.

Evogone

21-04-2009, 11:29

Rally car is 3.5deg camber (tyres wear even) and 1.5deg toe out (turns in very well).

Set to 0 deg toe out and it didnt turn in as well when i had the LSD fitted. For the road / track then 0.5-1 deg toe out.

summeh

21-04-2009, 13:08

road cars tend to have 1-3mm toe in, as this helps straight line driving. for racing you need 1-3mm toe out, as it helps turn in. I have the cup car set to 2mm of tow out iirc.

For camber the left hand side is always 4 degrees negative, whilst the right hand side (drivers) is normally 2.5-4 degrees negative depending on the circuit.

northy

21-04-2009, 15:34

standard in the book is 0 toe in. All my cars are set to this.

The camber on my rally car is -4degrees

summeh

21-04-2009, 17:38

standard in the book is 0 toe in. All my cars are set to this.

The camber on my rally car is -4degrees

BULLSHIT! Since when did you have a rally car????? :lol:

richy

21-04-2009, 19:07

mine is running -1.5 degree camber (fronts) , toe is pretty much 0 iirc

rears are std

northy

22-04-2009, 10:38

didnt know i had, ment race summeh

Richardcard1974

22-04-2009, 11:44

I just lined mine up by eye and kept altering it until it felt right to my driving style.

Coops

22-04-2009, 11:46

turbo runs -2.5 deg camber both sides, 0 deg toe

cliokongen

23-04-2009, 11:20

Thanks for all your replies:

Went from:

Total toe: 0 deg 25 minutes (Which is quite a surprice as i was told it was set up to 0 deg!!!!)
Camber: -1 deg 50 minutes (both sides)

Result:

Total toe: -0 deg 20 minutes (Comined with a slightly lower setup and 6mm spacers on the front axle im sure this will create some more turn in)
Camber: -2 deg 30 minutes (both sides)

Will test on next wednesday! :D

Michael

J o n

23-04-2009, 12:03

I just lined mine up by eye and kept altering it until it felt right to my driving style.

Scientific approach then? Should find those hedges twice as quick now ;)

Richardcard1974

23-04-2009, 12:20

I just lined mine up by eye and kept altering it until it felt right to my driving style.

Scientific approach then? Should find those hedges twice as quick now ;)

It depends how you measure the effect of the changes. By taking an objective end point such as the temperature across the surface of the tyre, you are effectively gatering data wich can be analysed empirically. Obviously, subjective measures are not as good, but can still be valid for scientific method. Many social science papers use sunjective measures, but so do traditional science.

But as i am a trained scientist, and you are not, i will not hold my breath for a good discussion on study design from yourself.

Wobba

23-04-2009, 12:33

Thing is I lined mine up by sight as well, and after various adjustments over a period of time it felt more or less right. Trouble is I am getting very noticeable wear on one tyre (inner tyre wear on O/S front) and not the other.

I would like piece of mind with my tracking and get it done properly, but with adjustable suspension and possbile worn parts I keep putting it off as I can't afford to keep getting it done each time I fiddle with something or replace parts like track rods/arms, wishbones, struts, new top mounts, driveshafts and bearings etc...:/

Adi82

23-04-2009, 13:09

Is there any way to adjust the rear toe and camber. I'm guessing it will require some shims behind the caliper carrying bracket somewhere behind the 4 bolts. Are any already available?

Adi

MAXIBOY

23-04-2009, 13:36

not as far as i can work out as its mounted on the stub axle so adding shims will not alter anything unlike on 172etc..

only way is to alter the complete trailing arm somehow..

schakal

23-04-2009, 13:38

only way is to alter the complete trailing arm somehow..

scaffolding tubes are great for leverage :wink:

:D

MAXIBOY

23-04-2009, 13:49

yeah can alter the mounting points to if running bearings instead of bushes..

MAXIBOY

23-04-2009, 13:55

or converting a mk1 axle to bolt on stub axles maybe.. :?

cliokongen

23-04-2009, 14:04

not as far as i can work out as its mounted on the stub axle so adding shims will not alter anything unlike on 172etc..

only way is to alter the complete trailing arm somehow..

True....

I actually had some shims made for this purpose - but decided not to use them as the angle between the axle and caliper were to great for my liking.

I would work - but....
Pads will be unevenly worn and its just not a proper way of doing it.
A proper way would be to build a jig and "tweek" the std. rear beam to desired spec.

On my race car i have a different rear beam with different settings from std. Unfortunately i have no idea what kind of angles its running.

Michael

MAXIBOY

23-04-2009, 14:08

wouldn't adding shims just make the calipers run out of true..

disc/hubs would still sit square on the stub axle.. :?

cliokongen

23-04-2009, 14:32

wouldn't adding shims just make the calipers run out of true..

disc/hubs would still sit square on the stub axle.. :?

Exactly - as they run out of true the pads are worn at an angle.

Michael

Adi82

23-04-2009, 22:48

Good point didn't really think this one through properly. The stub axle is located in the beam and changing the angle of the carrier won't do anything. I think ive failed as an engineer. :(

cliokongen

01-06-2010, 23:12

Rally car is 3.5deg camber (tyres wear even) and 1.5deg toe out (turns in very well).

Set to 0 deg toe out and it didnt turn in as well when i had the LSD fitted. For the road / track then 0.5-1 deg toe out.

I presume that is 1.5 deg total (L+R) ?

Michael

Evogone

02-06-2010, 08:03

Rally car is 3.5deg camber (tyres wear even) and 1.5deg toe out (turns in very well).

Set to 0 deg toe out and it didnt turn in as well when i had the LSD fitted. For the road / track then 0.5-1 deg toe out.

I presume that is 1.5 deg total (L+R) ?

Michael

No 3.5deg both sides..! but mine is maxed everywhere and the tyres wear evenly. Biggest thing is 1.5mm toe out as set too parallel with the diff it will understeer.

cliokongen

02-06-2010, 11:24

Rally car is 3.5deg camber (tyres wear even) and 1.5deg toe out (turns in very well).

Set to 0 deg toe out and it didnt turn in as well when i had the LSD fitted. For the road / track then 0.5-1 deg toe out.

I presume that is 1.5 deg total (L+R) ?

Michael

No 3.5deg both sides..! but mine is maxed everywhere and the tyres wear evenly. Biggest thing is 1.5mm toe out as set too parallel with the diff it will understeer.

I run approximately 3 deg camber both sides.
I also have an even wear.

The 1,5mm toe out is that per side or in total?

Evogone

02-06-2010, 21:35

Rally car is 3.5deg camber (tyres wear even) and 1.5deg toe out (turns in very well).

Set to 0 deg toe out and it didnt turn in as well when i had the LSD fitted. For the road / track then 0.5-1 deg toe out.

I presume that is 1.5 deg total (L+R) ?

Michael

No 3.5deg both sides..! but mine is maxed everywhere and the tyres wear evenly. Biggest thing is 1.5mm toe out as set too parallel with the diff it will understeer.

I run approximately 3 deg camber both sides.
I also have an even wear.

The 1,5mm toe out is that per side or in total?

The mm measurement is total, mines running 2mm at the moment and seems very good.

cliokongen

02-06-2010, 21:54

Had my tracking done today.

-1mm toe each side... -2mm total toe out
-2deg25min camber per side
+2deg25min caster per side

Looking forward to trying this set up on track....