Make it handle

[robnolimit]

Yes to the last post.
As some threads are talking about camber, caster and bumpsteer, It seems this is a good time to shed some light here. 1. Anyone who claims "NO BUMPSTEER" is full of steer stuff (b.s.) So. we need a way to compare bumpsteer. Some use degrees of steering, and some use a dimension. You can convert one to the other with some trig., but it's not really needed. Unless you have a laser rack, and lots of other toys, we'll talk in dimesion. What were trying to find out is HOW MUCH does it turn during the travel? and does it turn 'in' or 'out'? Most racers and chassis builders use a 'toe plate' and some dial indicators. The typical toe plate is 20" wide and 6"+ tall. We have a "floating" guage stand which is a bit easier to use. Once set up, you chart total toe movement for every inch of travel. We typically test + or - 3" from RH. The goal is to be less than .1" of bumpsteer per 1" of travel. Of coarse, the lower the better. When you first look at the chart it looks really bad, but look at the scale. Each 1/4" on the bump scale = .020" . To the right on the chart is a 1 to 1 drawing, as you can see, it's very hard to compare changes this way. In 3" up compression travel we have .173" on bump 'in', and in 3" of droop, we have .148" of bump 'in'. An outside average of .058" per 1" of travel. If you converted this to degrees it would be .163 degrees per inch average. Just so you know, the first pict, and graph are tests on our C-10 R/P kit. Bech testing is easier than on the vehicle, but it takes about 1 1/2 hrs to set up, the 20 min to chart. Each time you make a change, you start over. Fun stuff, but it pays off.