Caster on a SFA truck.
#1
08-16-2007
Caster on a SFA truck.
The following was taken from a few different threads. I am trying to make sense of what is right and what is wrong.
I need to figure out how much caster I need on my D44. My Plan is once i get the pinion angle and the caster figured out then I can figure out where my upper and lower mounts go along with the coil mounts.
I hear a Jeep has about 4* positive caster. But then Andrew above says I need negative caster. ZainyD seems like he is saying I need positive caster.
Found this picture on wiki and seems like i would want positive caster??
Originally Posted by zainyD
What I would do is this; narrow the axle, but leave the inner knuckles off. Get your front suspension set up how you like it and slide the axle under the Zuk. Once you get your pinion angle set put the inner knuckles on and set the caster. Depending on what tire size you want to run I would set the caster between 3-7*. I am running about 5.5* of caster with 35's and it's just about right. I could have a bit less and it wouldn't hurt me. You'll want to set your camber for 0* or maybe just a tiny bit positive.
Originally Posted by zainyD
Ya, that would probably be OK. If it was me I'd set it between 5-7*. How much street time is this going to have.
Originally Posted by redranger4.0
IIRC positive caster is the upper BJ ahead of the lower BJ, negative caster is what you want
I need to figure out how much caster I need on my D44. My Plan is once i get the pinion angle and the caster figured out then I can figure out where my upper and lower mounts go along with the coil mounts.
I hear a Jeep has about 4* positive caster. But then Andrew above says I need negative caster. ZainyD seems like he is saying I need positive caster.
Found this picture on wiki and seems like i would want positive caster??
Last edited by zabeard; 08-26-2008 at 09:44 AM.
#2
08-16-2007
Yes Positive Caster is what you'll want (upper ball joint trailing the lower). Positive caster is what causes your steering to return to center if you let go of the wheel from a turn, but may make for slightly stiffer steering. Neg caster tends to stay where you leave it, but makes for less effort to turn the wheels (upper ball joint leading the lower). If the caster is off from side to side it can cause a pull but does not wear the tires like camber does. When I use to do alignments I always used caster to off set for road crown.
#3
08-16-2007
Originally Posted by Rev
Yes Positive Caster is what you'll want (upper ball joint trailing the lower). Positive caster is what causes your steering to return to center if you let go of the wheel from a turn, but may make for slightly stiffer steering. Neg caster tends to stay where you leave it, but makes for less effort to turn the wheels (upper ball joint leading the lower). If the caster is off from side to side it can cause a pull but does not wear the tires like camber does. When I use to do alignments I always used caster to off set for road crown.
so you make the caster a bit different for the crown on the road?
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