Camber front TCS

[kram350kram]

Just a question on camber setting for the front suspension, rears are 1º neg. 0º is specified in the repair manual but with adjustable a-arms, wondering what most are running. Thanks

[BDA]

The workshop manual recommends 0 to +30'. That seems to produce pretty good results.

[literarymadness]

It makes a difference with the size tires you are running.  Zero degrees up front for the stock 175/70R13 is about right but I have 185/60R13's up front so my camber is set at -1 degrees (recommended to me by Steve Smith at Twin Cam Racing in Sarasota).  A wider tire normally does better with a little more negative camber than stock. Toyo recommends -1 to -3 for the 205/60R13's in the rear and I have mine set at -2 degrees.

[jbcollier]

BDA:

The spec is 0° +/- 30'

You don't want to run positive camber.  I set mine to -30'

[BDA]

Hmmm. I had checked the TC manual (see attached is a screen grab from the TC manual) I had assumed kram350kram had a TC but that is an assumption I often make in error). It seems odd that the S1/2 would be different from the TC. I wonder if that was a misprint? I wouldn't want positive camber either and I was somewhat surprised to be reminded what the spec was.

[jbcollier]

Interesting, and odd indeed.

[BDA]

I'm going with misprint or typo.

[EuropaTC]

Interesting.  I looked at the handbook to see if there were any differences and yep, they are.

The handbook says you can have plus or minus 30' !

Brian

[BDA]

Which handbook is that, Brian?

[Clifton]

It depends on what you do with the car. If you are just driving it casually 0 is fine. If you track or autocross you could run more but running more without the need will wear the inner a little more. I run -.75 degrees in the front and a little more caster. I used a pyrometer to decide what is best for the tire for autocross. If I only drove on the street I would still run a little, maybe -.25-.5. Even with the low tire pressure, they don't seem to need much camber as a heavier front engine car would.

[EuropaTC]

Which handbook is that, Brian?

Mine !!   

Flippancy aside, it's also in the S1 reprint that John organised a while ago so I suspect it's something they've had from day 1 and carried through all of the model handbooks.  It's a bit irrelevant on the standard car because altering it means deliberate tinkering  so I bet it's just there to identify any kerb damage to wishbones or uprights ?

Brian

[BDA]

Ahhh... That handbook!

I think the TC manual misprinted the front camber spec. I agree, they put that in to tell if something is bent.

[jbcollier]

Yup, to check for chassis damage.  The swivel-pin inclination tells you if the upright is bent, a very common issue.

[literarymadness]

I think there is also something to be said about tire manufacturers' recommended camber settings for a particular tire. I run my tires at -1 degree in the front which is the least negative recommended setting of the manufacturer and only a half degree more negative than the original factory recommendation. I run -2 at the rear.

SETUP & CARE
Toyo Tires recommends the following general setup guidelines for the Proxes R888R:

Operating Temperature: 160°F to 220°F
Hot Inflation Pressures: 32 to 38 (psi)
Camber: -1° to -3°
Caster: As much positive as possible

[GavinT]

I think it'd be a brave man that would follow Toyo Tires recommendations over that of the vehicle manufacturer.

Though I suppose if you're going to run 38 PSI in the front tyres, you might be looking for some negative camber to regain a little steering.