Hello,

I will be doing the string and jackstands method for toe adjustment. I noticed the bentley is using "degrees" as the unit of measurement.

Bentley says:

Total toe = 0° 18' +/-5' ---->Anyone here know the exact conversion to inch \ mm ?

Others mentioned about 1/16 inch ( per wheel ) or 1/8 inch total as their default factory but they are using the expensive machine.

If I convert this in metric it will be:

Per wheel: 1.5875 mm

Total toe: 3.175mm

Am I correct on this?

 

It depends on where you take the measurement - which should be done on the rim, not the tire.
If you have 16" rims and measure between the beads of the rim at the furthest point forward and compare that to measuring at the furthest point rearward, then 18' total toe is about 0.082 inches difference in the measurements.
Also, alignment measurements should always be done with the car resting on the ground because toe angle changes as the suspension moves (aka "bump steer")

 

I was researching online and found this:



Based on his BMW chart\ table for example my R53 got 17" wheels.

Wheel size: 17"

Total toe: 18'

with those numbers plugged in:

Total toe: 2.5mm

Per wheel: 1.25mm

 

If you have Powerflex front control
arm bushings installed (HIGHLY
recommended) you can go to
almost zero toe out, since
they toe-in under acceleration
much less than the stock bushings.

 

Here's the image as to how I got that value. So if someone here got this BMW table pls share?... this is the closest one i can clearly see.

 

what if I just put in "ZERO" toe in... what's the disadvantage of this?

 

0.082 in = 2.0828mm ( for 16" wheels, mine is 17" )

this is close to the BMW table\chart from that youtube video.

17" Wheels, 0° 18' = 2.5mm Total toe

Where can we get this document below?

 

Zero toe works fine with PF bushings.
Get the Purple street ones.
No reason to get the black
race ones unless it’s
primarily a track car.

 

thank you

 

It has my notes all over it and I have no idea where I got it, but here it is.



I have 17 inch rims but when I measure them from edge to edge (from the points on the wheels I take the string measurement from) it's 18.25 inches. So I used the 18 inch column.

I aim for 0 toe in the Front & slight toe in for the Rear and I have had good luck with these settings.
I found this website that will run all your numbers for you and spit out everything you need.
https://robrobinette.com/DIYAlignmen...oogle_vignette





Everything above is in inches. I and J are the distances I measure on the wheels.
Wheelbase for the r53 is 2467 mm / 97.1 inches goes in box K.
One more thing to keep in mind is thrust angle of the rear wheels, which is part of setting up the rear toe. AND adjustments to your rear camber will affect your toe angle, so adjust camber first.
In the measurements above...the thrust angle of the rear wheels to the front wheels (97 inches away with a .04 angle) is .068 inches off. 1/16 of an inch... pretty good.

 

Thank you very much man... I will need to somehow replicate\digitize the whole sheet. Let's see if Ai takes it.

 

Here's an online tool., looks accurate almost the same as the BMW chart.

I plugged in the my R53's specs:

Wheel size: 17 inch
Factory Toe in total: 0° 18'

mm conversion value from BMW chart: 2.5mm
mm conversion value from wisefab converter: 2.3mm



Wisefab online Toe converter

 

Here you go here's the PDF version... hope this helps

 

Thanks for the link to the Toe Converter calculator.
Not splitting hairs here but it make a very small difference for toe, depending on if you are using:

1) Rim size: 17 inch . OR 2) measuring distance on the rim: 18.25 inches for me when I do the string alignment.

Pluging in 18.25 into the calc & it gave me 2.4mm.
But let's not get crazy... I'm happy with anything within a millimeter of what I'm going for.