What'd you decide on for pivots?

 

Current plan is poly at the frame for the lower arms, a uni-balls for the upper and lower outers and not sure how I want to do the frame joints for the uppers. Maybe uni-balls maybe polys, maybe heims.
Heims are nice for adjustable but how much adjustable do I really need? It's not a DD, seldom sees the pavement if ever, never goes above 60mph even on the highway. I can build in the caster and camber I want. Hmmmm????

 

I've been thinking the same thing except can't decide between heims or uniballs for the UCA inner pivot. Threaded adjustment is nice, but it's incremental. Cammed bolts like the LCA on a stock IFS would work as well with uniballs with more fine adjustment, but also easier to knock them out of alignment.
Can also do a right/left hand threaded sleeve, but that has the potential to come loose and unthread itself while driving.

 

I do think you want/need the adjustment because the tolerances on something like this isn't easy to get bang on without a nice jig table and fixturing.

 

True, I have CNC milling machine to help get parts perfect but there is still the welding assemblies and to the frame.

 

Right, the tricky part is getting them on the frame square and placed proper in respect to the rear suspension.

 

one think i would like to see is pushing the IFS as far forward as you can so you can run larger tires without alot of lift

 

If you use a supra diff up front will it be running against the coast side or drive side of the gears. i always figured building a high pinion 8 inch would be the way to go up front. Obviously would require a custom housing.

 

Use a Tacoma ifs 8" front hi pinion clamshelland mod it to be a center diff

 

Yeah I was planning on something along those lines to help the 36's clear a little better.

Well this would be just like I have now and probably 95% of solid axle Yota owners. Not a concern right now, maybe if a sold out and use a SBC,but that will not happen.

Probably not, again I think I can get more ground clearance with tucking the Supra diff up and a little fwd out of the way.

 

Parts slowly arriving from Steinjager.

 

Some fit up parts being machined and then matching the mount surfaces.

 

Very cool. Do you have the machine for work or hobby?
I just finished a manual machine class. Now we get to start learning some basic programming and set up on the cnc machines.

 

It's what I have at home to build all my parts on. I worked in a machine shop for 15yrs and did my Machinist apprenticeship before I started working as a R&D Engineer.
The CNC is a Tormach PCNC1100, I've added the power draw bar and tool changer, 4th axis. I've had it 5yrs now in Dec., it's great to be able to have CNC capabilities for all my crazy ideas. CNC plasma is next, I have a design idea for one that no one else is doing, so I'll use the plasma at work to make one on.

 

Yeah, I bet. I've used the manual machines at school to make some threaded adapters for some projects are home, but having the machines at home would be awesome.

 

Any input on steering setup,
IFS, rack and pinion, hyd. assist, full hydro?

 

IFS steering box all the way. rack and pinion is way less customizable unless you go full custom. You want front steer, rear steer like the tacomas is no good. With rear steer the slack in the joints will cause my steering angle instead of less.

With the IFS box, you can make your own center section and tie rod ends. custom placement and lengths for every part. Stronger, more serviceable and cheaper.

Obviously no bump steer is ideal, but you'll usually end up with some anyways, so...

You always want lean towards toe out for bump steer so that when you go around a corner the body roll will cause the outside wheel with more grip to toe out. Body roll causing increased steering angle is much harder to control and much more unpredictable.

I tend lean towards just the stock IFS box, I have it with my 81 and with 35s it already is very easy to steer and I like feeling the bump steer in the wheel. If you went full hydro or even hydro assist, I'd be afraid of losing that feedback on what the wheels are really doing.

 

and I would make my own double shear pivot with a good bearing for the idler.

 

Yep, I have the IFS box on already and building a complete HD setup is looking like the plan, unless I decide on R&P front steer. When I get stuff closer to mocked up I'll look at it all again.

 

R & P has a lot less adjustability in the future. Easier to make a longer center link if you decide to play with pivot lengths. The con is that it is difficult to move the idler and steering box once its placed.