Flexing the 3 link (5 Viewers)

[Delancy]

Gotcha on terminology.

The rear rings were stacked on top one another, and was planning to depict before I was interrupted.

Will have another chance. If I can figure out how to hook one wheel to the crane, will jack up opposing, for a before and after comparison later down the road.

Rear steer should alleviate with longer links, right?

 

[ToyRoverlander]

You can't use a forklift again? Gives a good front/rear comparison.

Longer links helps a bit, but not as much as pushing the lowers out on the axle as far as possible and mount them at centreline, not below (which means shock relocation), push the frame mount inwards a little bit, as far as you can without hitting the gastank. Then move the panhard axle mount up as far as possible. That flattens out the roll axis a lot and alleviates roll steer. Look at the last screenshot I posted, that has the numbers on it. If you can manage to mount the links like that you'll have excellent numbers and only a tiny little bit of axle steer.

 

[nukegoat]

You can't use a forklift again? Gives a good front/rear comparison.

Longer links helps a bit, but not as much as pushing the lowers out on the axle as far as possible and mount them at centreline, not below (which means shock relocation), push the frame mount inwards a little bit, as far as you can without hitting the gastank. Then move the panhard axle mount up as far as possible. That flattens out the roll axis a lot and alleviates roll steer. Look at the last screenshot I posted, that has the numbers on it. If you can manage to mount the links like that you'll have excellent numbers and only a tiny little bit of axle steer.

It probably won't make a huge different with the adjustments you're suggesting here (especially with all the bushings in the rear) but additional triangulation on the control arms will be fighting the lateral movement of the Panhard.

 

[Delancy]

You can't use a forklift again?

Yes, but only have one on the job and was wanting to peg it front and rear, simultaneously.

See how far it can go....

Be back early week once we start standing steel, and will play around with more.

Really only posting here for conversations sake, not comparing, so pipe down Booger.

My short term intentions are irrelevant, but, longterm, I'd like to see a complete subframe with all mounts inclusive to.

Like to know more about BWs plans for the 9.5" front pinion/driveline angle, as an elocked 9.5" front in an OEish looking housing tightens my pants a bit.

 

[Delancy]

I wanna three link the rear, too.

 

[ToyRoverlander]

I didn't mean to compare it to Boogerz 80... I ment a front/rear comparison. When you lift it up from the front, the front will articulate less then when you lift it up from the rear. Same happens at the a$$ end.

Goat, I don't think that little bit of triangulation will cause much, if any, problems with the panhard. Especially when it's raised and lies flat at ride height.

 

[Delancy]

I didn't mean to compare it to Boogerz 80...

I know what you meant.

My was directed at BW since he said no more talk of arms was allowed... Hahaha.

Does anyone else feel the subframe with integrated link mounts holds promise?

 

[Booger weldz]

I'm doing another one of these(this was my 4door taco).

I know what you meant.

My was directed at BW since he said no more talk of arms was allowed... Hahaha.

Does anyone else feel the subframe with integrated link mounts holds promise?

 

[VuickB6]

Rear steer should alleviate with longer links, right?

So it is the link length on these things that causes the rear axle to steer?

 

[nukegoat]

So it is the link length on these things that causes the rear axle to steer?

It's the linear displacement of the axle from the links as they rotate about an axis. Longer links will reduce the effect, sure, but the reason the rear end is unpleasant once lifted is because the angles of the links (the lowers, really) are too steep.

 

[Booger weldz]

Roll axis defines 'flex steer'. Over/understeer is flex steer. What youre seeing on the ramp(in exagerated appearance) is what is causing the disaster on the road.

A 40" link has about a 1 3/8" reduction in length when moved up or down 10".

Its exactly what nukegoat is saying. But kinda hard to visualize. The longer/flatter/more triangulated the links are the more they share the same affective length when articulated. No different than a long panhard causes less shift in axle position vs a short one, but now you have two links changing affective length(in the swing of the arcs) and it causes steering

 

[Delancy]

@Booger weldz

Are you planning to three link the rear?

 

[Booger weldz]

Lots of 'plans', but as all of us, 58 hr work week, kids and....

The front is an absolute. Its dangerous on pavement. I rented a tacoma starting june 20th for the front destruction and tcase disembowlment.

 

[Delancy]

@Booger weldz

What's the plan for the front 9.5" pinion angle?

(Keeping it simple, since I now know that verbose posts with multiple questions confound, 'cause I've asked this chit ten times. )

 

[Booger weldz]

Its got 4.5 degrees of caster and 10 or 12 degrees of pinion(its been a year since i built it so i forget).

Yeah, i suck at answering multiple Q's on an Iphone while pooping at work sorry

 

[Booger weldz]

It's actually setup to transfer my 4runner tommorow to its new owners house. I'm sure you'll appreciate the makeshift tierod and the pinions down at like 5 degrees here

 

[Booger weldz]

If toyrover is online we could grab numbers on this setup, it is however on a uber modified 2nd gen 4runner

 

[Delancy]

10 or 12 degrees of pinion(its been a year since i built it so i forget).

Lemme back up a bit, 'cause I'm too stoopid to translate into usable data.

Is it gonna run parallel with the diff, or point at it?

In other words, how are you gonna keep it from vibrating like a giant Sybian?

 

[Booger weldz]

Up. double cardon on the driveshaft at the tcase.The $100 modded version of a 2002 4door taco rear, not the $450 slee item...

 

[Delancy]

Up. double cardon on the driveshaft at the tcase.

Ahhhh....I see you only used the chunk.

Well, chit. I was stoked about knuckling a rear axle and running it, like it should've come, of course, this after buying an 8" front axle for this project.

I bet I could screw up the angles enough to warrant the double, double cardan shaft still....