Trying to cure understeer

[M3SQRD]

Originally Posted by Track/S

Sport rs mounted, rear toe moved to -4mm and understeer problem solved.

That’s great! -4 mm total toe, correct? The Sport RS look like they’re a blast to drive on track.

[Track/S]

Originally Posted by M3SQRD

That’s great! -4 mm total toe, correct? The Sport RS look like they’re a blast to drive on track.

Right, -4mm total toe.

For track use i think stiffnes construction is better, on mountain roads sport rs are perfect.

[RugbyBro]

Originally Posted by Track/S

Right, -4mm total toe.

For track use i think stiffnes construction is better, on mountain roads sport rs are perfect.

Toe out in the rear? Or am I reading that wrong?

[Track/S]

Originally Posted by RugbyBro

Toe out in the rear? Or am I reading that wrong?

in, out would be undriveable.

[M3SQRD]

Originally Posted by RugbyBro

Toe out in the rear? Or am I reading that wrong?

Originally Posted by Track/S

in, out would be undriveable.

In the US, rear toe-in is positive, toe-out negative. I’ve come across this rear toe-in & toe-out sign discrepancy before. Your front toe-in is positive, correct?

[Track/S]

Originally Posted by M3SQRD

In the US, rear toe-in is positive, toe-out negative. I’ve come across this rear toe-in & toe-out sign discrepancy before. Your front toe-in is positive, correct?

We will make it easier so that there is no confusion, closed back 4mm total and front 1mm open total.

Looking at the old alignment data, here is what you say, I got confused:

[M3SQRD]

Originally Posted by Track/S

We will make it easier so that there is no confusion, closed back 4mm total and front 1mm open total.

Looking at the old alignment data, here is what you say, I got confused:

I never said you got it confused. There are other countries that define rear toe differently but front toe the same. The difference in rear toe being some measure the angle wrt movement of the forward edge of the tire vs. wrt movement of the aft edge of the tire so same angle, different sign. However, the angles used to measure front and rear toe are the same and both reference motion of the forward edge of the tire. So your + toe-in uses the same reference as out + toe-in. Your latest toe setting is +4 mm total toe-in on the rear. There was an old thread where everyone was telling this guy he’s running toe-out on the rear and he kept saying he wasn’t. In his country, they used aft edge movement to define rear toe so in his case toe-in is negative.