Lap Record Alignment setting

#1

I’m finally getting around to unloading my 91 car and check the trick setup for last months record lap at Thunder hill. So if you want to go fast, toe out the rear really bad and drive like a mad man.:woohoo:

#2

Is the toe really that bad? I’m not used to looking at toe in degrees. We use toe plates and inches.

Assuming the toe plates are 18" long, you’re dealing with a 9" radius from the hub to the measurement point. That gives you a ~57" circumference. Each degree equals 0.157". The total toe out on your car was 0.18 + 0.54 = 0.72 degree, or roughly 0.11" (slightly less than one eighth).

Either I have screwed up the math or the graphic with the measurements is misleading.

#3

Yes it’s a exaggerated display of the settings. When you put it in inches, it doesn’t sound that wacked.

#4

[quote=“Steve D” post=57451]The total toe out on your car was 0.18 + 0.54 = 0.72 degree, or roughly 0.11" (slightly less than one eighth).

Either I have screwed up the math or the graphic with the measurements is misleading.[/quote]Thinking about this some more, I did screw up the math. I only included the 0.72 degree angle once. To capture total toe, this angle should be doubled to account for the fact that the front of the wheels is out by 0.72 and the rear of the wheels is in by 0.72.

So, 0.22" total toe out. Roughly 7/32". A skinny 1/4". That’s a fair amount of toe out. I bet the car rotated nicely. :wink: