How much rear toe in are people running at track?

[GregTas]

How much rear toe in are people running at the track?

I'm assuming a bit of toe in works best.

[C.A.R.]

1deg  toe in.

[260DET]

My S30 used to run ~2*, under heavy braking you don't want the wheels to move to toe out so it depends a bit on how solid the rear end is.

[GregTas]

Thanks. So I'm doing it home and I can't measure degrees, but measured track in mm and then converted with a bit of trig. I end up with 0.6 degrees total. So sounds like I need a bit more.

Now this surprised me because when I measured the track at the front and rear of the wheels the difference in track is 5mm. This looked like it was way too much. I was thinking perhaps 2-3mm total toe in.

So just confirming I need to put more toe in on it?

Edited January 29, 2020 by GregTas

[RLY240]

1mm at the wheel rim is a reasonable amount.  I run about 1mm toe in at the rear total and about 1mm out at the front per side. 

[GregTas]

Thanks. I'll reduce it a bit and see how it goes.

[GregTas]

Reduced my rear toe. About 2.5mm toe in now. Car turns in better on low speed corners and easier to manage coming out of corners under power.

but last time out I did have new tyres front and rear. It'll be interesting to see when the rears wear down as they usually do quite quickly how much it upsets the balance. Hopefully it doesn't change as much as it did and the rear alignment was the main issue.