8 replies to this topic

[miniman24]

Hey all, Ive just had my rear toe measured, and its at 2 degrees toe in, as measured on the old Dunlop style gauges. This is right at the end of what the gauge can measure, so I assume this is too much? The garage that measured it said you cant convert it to mm, but I wasnt convinced, so are they right?

[minisilverbullet]

I am not entirely sure - but i think it is 0.2256 degrees for each mm toe

[miniman24]

Any more opinions on this?

[carbon]

2 degrees is a lot of rear toe-in.

A BL factory manual from early 70's mentions 1/8 inch (ie 3.2mm) toe-in. If the above 0.2256 deg per mm is correct then the factory manual setting would be equivalent to about 0.72 degrees toe-in.

Have you checked the alignment on both sides?

[miniman24]

Its just about equal toe in either side - it is a pattern subframe, so Im guessing this is the cause Im going to get some of these shims

http://www.minispare...assic/CK17.aspx

to correct it, they add 0.7mm toe out each.

[Cooperman]

The correct toe-in is 1/8". This represents 1/16" over a 12" diameter each side. So, dividing Opposite by Adjacent we get 0.0625/12 = .0052. This is the tangent of the angle of one wheel which is 0 degrees 18 minutes. So the combined angle across the back wheels is 0 degrees 36 minutes, or just over 0.5 degrees, this being the maximum figure.

[miniman24]

Thanks for that Cooperman, just the info I needed - I have 10" wheels, which gives a value of 0.00625 when applying the Tangent function rather than the 0.0052 for the 12" wheels - what would this be in degrees and minutes? Or does this not apply and the 0.0052 value works for all wheel sizes? If so, using the values, I need 5 shims each side to bring the toe into spec.

[Cooperman]

0.00625 as a tangent is 0 degrees 24 minutes, so the maximum toe-in should be 48 minutes which is 0.8 degrees inclusive across both wheels. I'm sure I don't need to mention it, but make sure the car is equal both sides with respect to the front suspension.

[miniman24]

So I need to take away 72 minutes of toe in to reach the max acceptable value - which equals approximately 8 shims. A fair way out! I will double check the wheel bases front to back and diagonally, but the body is mint with a bare minimum of welding ever carried out, so hopefully it should not be out by much. Thanks very much for your help :)