How much toe-out on the front do you think is too much? Also, being mathematically challenged (I still count on my fingers), how many degrees (.10) equals how many inches (1/16)?

TomA

 

1/16" toe out is about .075 degrees each tire (.15 degree total).

degrees toe = inverse sin(toe out in inches/tire diameter in inches)

 

We set ours at .15 total toe out in the front and .04 toe out rear (with as little neg camber as possible)

Per

 

Per,

Is that total toe or per side?
I had mine checked last week and RF was -.22 and LF-.19; total toe -.41!!

TomA

 

Whoops. I should have read your post with my eye-glasses on. That last post (question) was the blind me.

Thanks

 

Or if using the longacre toe plates: degrees toe = inverse sin(toe out in inches/~21.5)

 

I typically don't run a lot of toe on the front and with so little rear camber, I don't need that much in the rear to make the car rotate.

See you in Ft. Myers.

 

Per,
Nice write up in the new GRM on the MINI set up. I found about the same settings after about 2 1/2 seasons screwing with it. I then added camber plates and started over. Funny thing is, I ended up back to the same settings again. Go figure. My MINI just likes them, I guess.

Good Luck this season. I'll see you if you come through Peru. I'm one of the slower STX guys, but having fun anyway.

...Mark

 

Stupid question - I run a 17" wheel on the street, but I AX with 16's. If I were to get the alignment with my 17's on, would it change the settings when I run the 16's?

 

No, your toe settings will be the same no matter which wheel you use.

 

As long as the diameter of the tire is approximately the same...

 

As the diameter of the tire changes what happens?

Say I have two wheels-

One for street use 17x7 with 215/45-17 outer tire diameter 24.6"

and one for autocross
15x7" rim 205/50-15 tire with outer tire diameter 22.9"

If I align with 15" wheel on then that is fine for autocross but what happens to the alignment when I change to street tires?

Or what if I align with the 17" wheels on then go to autocross and run the 15" wheels? What happens to alignment in the reverse?

???????????????
Anyone have trouble with 1/8" toe out instead of 1/16" out?

 

oh, that's just a math porblem, I can usually do those

if you set the toe to 1/16" out with the 15" wheels on, then the toe out with the 17" wheels on would be about 1/15" out, just ever so slightly larger (less than 1/64" different). you can do this yourself for various wheel outer diameters

new toe =~ old toe (new wheel diameter / old wheel diameter)
=~ 1/16 * (24.6 / 22.9) in this specific case.
this is simplified for small angles, but who wants more than 5 degrees of toe?

basically, if your wheel diameters change by 5%, your toes settings will change by 5%.

 

OK, but does camber change relative to wheel size?

 

No