Adj control arm setting?
09-13-2015, 08:09 AM
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Adj control arm setting?
Hello quick question I'm trying to install my adj control arm in the front I have rear upper already and just got front lower. What the idea range for a 4inch suspension. Keep in mind I have a control arm drop bracket
09-13-2015, 09:20 AM
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Whatever length it takes to get you in the 4-5 degree caster range. If it's a bit flighty, lengthen them another turn. If you get some vibes, shorten them a bit.
09-13-2015, 10:48 AM
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09-13-2015, 10:49 AM
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awesome I was wondering if I should lose the drop bracket, I just didn't know if it would ride better with the drop bracket and then both upper and lower arms at 4inch
09-13-2015, 11:56 AM
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You don't need both. But no harm in running brackets and adj arms. Gives you more fine tuning for the caster/pinion.
The brackets will drop the angles of the arms, making them more parallel to the frame. In theory, this improves handling/cornering/nose diving/whatever.
The brackets will drop the angles of the arms, making them more parallel to the frame. In theory, this improves handling/cornering/nose diving/whatever.
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09-13-2015, 01:07 PM
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With a 4" lift I found I had to add so much castor to prevent vibs that my front coils bowed enough to contact the sway bar links. Of course this was with a cv shaft, with the factory shaft you'll be fine with much less castor but you won't be able to flex on a curb without hitting the exhaust. What's your setup?
09-13-2015, 05:07 PM
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With a 4" lift I found I had to add so much castor to prevent vibs that my front coils bowed enough to contact the sway bar links. Of course this was with a cv shaft, with the factory shaft you'll be fine with much less castor but you won't be able to flex on a curb without hitting the exhaust. What's your setup?
I have been thinking of removing it and inning just running upper and kier arms
09-14-2015, 01:48 PM
#10
The front & rear lower control arms cents the axles in the wheel houses and align the bump stops. The uppers set caster/pinion angle in front and pinion angle in the rear. If you do the front lowers only the setting is a bit longer than if you do both lowers and uppers, but not by much. Best rule of thumb, set them to 23 1/8" to start, have the caster checked and adjust a bit to get the best compromise between caster & pinion angle that delivers good steering an no front driveline vibration. With a 4" lift and short arms I ran them at 23 1/4" with 5 degrees caster. I have manual hubs, so the DL vibe issue was moot.
Last edited by SoK66; 09-14-2015 at 04:52 PM.