I own an S14, & got around to gauging bumpsteer on the front end, i have read that when adjusting, the goal is to have, as close to zero bumpsteer as possible, i was gauging one corner & my readings at 1 inch of bump is .035 toe out, & as i continue to bump to inch # 2 it continues to toe out to .100, then at the first inch of droop it is .020 toe out, & rises to .080 of toe out on the 2nd inch of droop; this is the best i could get it.
This is the only car i have bumpsteer gauged & was wondering if this is what is expected on an S-Chassis veh. i will list the front suspension mods i have, for reference-
IKEYA formula front lower cont.arms/tension rods; lower cont. arm length set to factory arm length. SPL parts outer tie rods/Z32 inners
GroundControl camber/caster plates (i am using the caster feature on the plates to adjust caster in a manner so as to maintain the wheel centered in wheel well) adding lots of caster via tension rods pushes wheel towards front of fender well, limiting clearance.
AST 5100/ dampners, Progress swaybar, Nismo power brace, 17x8 12offset front wheels
My static front settings are 8deg. pos. caster, 1.5deg. neg. camber & 1/16 total toe in, my static height is about an 1.5- 1.75 inch lower than stock so i am not slammed by any means.
Are my results due to the extra caster i have added which adds camber gain; which i think makes the toe change more, for a given movement. In the service manual nominal caster is 6.75deg & max is 7.50deg. (decimal degree).
I would appreciate some input