alignment caster specific help

Hey guys,

just got done installing my king lift, with some new UCA's as well. Ive been through 2 alignments so far and im still not fully happy with the ride.

my current settings are:

0 camber
0 toe
~1.7 caster

i am reading that 2.4 caster or so is ideal for a perfect setting. right now the car feels floaty/light at highway speeds. not as sketchy as when i had stock UCAs though, so thats a plus!

however, my real question, if i am understand caster correctly, if we add more positive caster, would that push the forward in the wheel well more? i am rubbing ever so slightly on the back of my fender when turning, i am wondering if adding more caster will a) fix the floaty and b) push the tire up enough to eliminate the rub.

thoughts? am i on the right track of understanding this?
-Skim

 

Correct. Adding more caster using the LCA adjustments will move the tire forward, adding more clearance. The added caster helps reduce the twitchy/floating feeling you describe.

1.7 is pretty low IMO. Most here suggest around 3. I prefer more towards 4.

 

What UCAs are you using?

 

Pro Comp Uniball

 

These? http://www.procompusa.com/prodDetail.aspx?partNo=EXP57002B&catID=1&subCat=101&ptID=3158&plID=109938

I couldn't find out much about them online on the pro comp site.

However, it appears they're definitely not adjustable.

So you may have already achieved all the caster possible out of your configuration.

 

those are them! my research findings said i could get 3* max. taking it to get another alignment tomorrow hopefully. finally found someone who sounded like they knew what they were talking about.

 

I have camburg UCA's and the caster is set at 2.5 and its awesome. I had the same wondering problem you speak of and this took care of it completely.

 

How in the world did anyone get above 3?

 

I could get above 3.0 with my LR UCA's if I wanted to

 

awesome, thanks for confirming bro

yea the alignment guy i called this morning does work for some of the camburg trucks. and he said he could easily they them 5* of caster. apparently those UCA's are super tuner status!

hoping i can get at least 2.5 out of mine.

 

Does anything else hinder the caster being higher? When I had mine aligned I told the to get it to 3 and they claimed the highest they could get it was 2.5? I hate to pay for another alignment but I sure would like it if it was higher it makes the truck feel like its on rails LOVE it.