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caster angle spec for a sierra front SPOA
Posted: Tue Jul 14, 2009 9:16 am
by oozuk
Just wanting to know the required castor angle for SPOA os i can check mine, As i'm getting death wobbles at 40km\hr, i'm tempted to try another set of tires and my 33 bias MT Claws have been sitting around for 3 yrs maby there out of round
Posted: Tue Jul 14, 2009 12:51 pm
by Ruffy
The Castor angle is determined by quite a few factors and therefore unless someone has specifically altered there caster angle until it was perfect or gone to the trouble of working it out geometrically then it will be trial and error.
As a starting point 2 degrees is kind of a bench mark for live axle front ends but steering geometry, unsprung and sprung weight are key factors.
I'd be getting it measured first and see where it is.
Maybe someone else on here has a SPOA that has been through the process??
Dan
Posted: Tue Jul 14, 2009 3:00 pm
by PCRman
Is your steering self centering at low speed? Thats a good rough test to see if you have major castor issues (like no castor or negative)
Posted: Tue Jul 14, 2009 4:39 pm
by alien
mines SPOA on lux leaves and running hiluz double cardans on drive shafts (ie: diffs rotated a fair bit)... no castor issues with mine at all.
are the wheels aligned? u-bolts tight? bearings ok? shackles etc all snug?
is it only under acceleration? could be just wrap...