bump steer/ camber question

[AK-Z]

I'm going to be building a tube chassis from the firewall forward. Now my question is in reference to the strut towers. The bumper steer spacers are for bigger wheels and/or lowering spring, correct?

 

Now if I have the strut mount outward a little more than the stock angle, would this correct the need for bump steer spacers? And what increase in angle is suggested?

[JMortensen]

Sounds like you need to do a lot of reading before you start building. "Bumpsteer spacers" are really roll center raisers, and the reason you need them has more to do with the lower control arm pivot point than anything else. Moving the strut towers outward will reduce negative camber and won't have any effect on bump steer or roll centers.

[AK-Z]

Sounds like you need to do a lot of reading before you start building. "Bumpsteer spacers" are really roll center raisers, and the reason you need them has more to do with the lower control arm pivot point than anything else. Moving the strut towers outward will reduce negative camber and won't have any effect on bump steer or roll centers.

Thanks. That I do.

 

So I do need spacers. Should I add camber to offset the negative camber from lowering then? Or will the spacers remedy that?

[blueovalz]

Installing the spacer will have a very small effect on the camber. it will lower the outer pivot point, and because the length of the lower control arm is fixed, the camber will change very slightly. Check out the currently running string (link below)about camber change angles. The author (tholt) has measured the amount of camber change with a 1" bump and rebound, and this would seem to fit into your query.

 

http://forums.hybridz.org/showthread.php?t=130005