What should my target alignment specs (caster, camber & toe) be?

If you don't want to read the progress to this point skip the next paragraph and head to the current setup below it and the one below that is where I think I should request my settings.

I'm taking my truck in for it's 2nd alignment in the last two months this afternoon. The first one was done after doing some suspension work that included returning my 5100's to 0" and adding OME 557's in place of my stock OR springs and then swapping out my rear OR leaf w/TSB for a set of Dakar all in an effort to realize a 3" lift. I drove it for a bit to get things settled and then took it in for an alignment. Due to suspension geometry they weren't able to get it aligned anywhere near where I'd be happy (no surprise there) so I ordered up some LR UCA's to correct alignment. My stance was about 2.5" rake so I thought I'd add another inch or so to the front end especially since I still had to add my winch so I ordered Toytec 3/4" top plate spacers and after adding them I also set my 5100's to the first setting (~1"). This got me closer to level after adding the winch and now my rake is less than an inch and all the springs have had over 1,000 miles to settle so I'm pretty confident that's where they'll ride now.

Current suspension setup is (front) 5100's up front set to 1" and OME 557 springs plus a Toytec 3/4" top plate spacer. Light Racing UCA's were also added. (rear) 5100's plus Dakar 3" leaf pack. (wheels/tires) FJ Trail Team wheels w/15mm offset (I believe) & Duratracs 265/75r16. Extra weight adders are a supercharger (nominal) along with All-pro plate bumper up front w/12,000lb winch.

My thinking is that 0, 0, & +2.5 for the caster would be my ideal target for alignment. Given my setup do you think this is ideal or if not what do you think is ideal and why?

Thanks!

 

Oops, I meant that that first setting was just shy of 1"... not really sure how I arrived at typing 1/4" though. Lots of measurements and differences bouncing around in my head from all the iterations of my suspension over the last several months. I'll make the proper edits.

 

Yeah it can. Especially since I'm taking measurements along the way and all the changes I've made to my suspension since I bought the truck. I guess the most important #'s of the post are 0, 0 & 2.5 in the end. I just know that a lot of people talk about tire size & lift size when it comes to the caster specifically so I felt the need to describe everything I have in case someone wanted to explain why my 0, 0 & 2.5 wasn't the most optimal target.

 

I just had my truck aligned at about 2.4+ caster and now need more positive caster to center the wheel in the wheel well better (getting too much rubbing on the cab mounts). I'm running 285/70/17 tires with a 3" coilover lift and Built Right UCA's. I'm thinking around 4+ caster should center me up better.

 

I'm at 2.9 caster and have no rubbing. The truck tracks very straight like this.

 

Interesting. I was tempted to try 2.8 but was afraid that this may be too much and 2.5 would be enough. Sounds like some are going even further and having good luck. As of now I don't have plans to run 285's but who knows down the road.

 

IIRC you need to increase caster using the lca's to get the tire to move forward. If you do it through the lr uca's it'll be moving it back? Someone correct me if I'm wrong please.