HDK Bump Steer 101
You mean objective results in the form of precision numerical measurements?...
Sure. Here's one I did with a standard Longacre bump steer gauge that measures to the .001" with a digital dial indicator at 7 1/2" out from the center of the bolted hub held level with a bubble gauge.
Very nice......it seems now, you already know the answer to your question being very knowledgeable and certainly no rookie.
However....I used my antique / old measurin' tools to try to give you (and others) a fair answer to your questions.
I measured 13", not 7.5", from the center of the spindle, so my numbers are a little strong. I figured that to be outer edge of a 26" tall tire. Honestly, many but certainly not all set-ups appear to be moving / bumpsteering so much that you can easily see the movement with your eyes.
Here are the results....
If it was off by
1* is .....3/16" or .1875 off center
2* is......13/32" or .40625 off center
3* is......5/8" or .625 off center
I might add, mine was not off 1* or 3/16"....it wasn't even off a single 16th.
There ya go!....I think that is what you were after.
Someday, I might get an bumpsteer guage that measures that precise. They look nice and do a hell of a job. I will have to put it on my wish list.
BTW...those are some trick uppers on that ride, they sure have a lot of ball joint sleeve angle on them. why so much? (just wonderin', must be for road course set-up)
