VP Axle Goodies Question..
 

Re: VP Axle Goodies Question..
 

the only difference i can see is the 8 deg ones will sit 8 deg further round to the back and the zero will sit more straight on so your steering tie-rod will be higher back so less stuff to rub it on but if you use the zero the steering tie-rod will hit more things.

Re: VP Axle Goodies Question..
 

i have noticed with the zero ackerman stuff the tie rod hits the diff before full cycle left and right, and i read somewhere the 8* stuff reduces "scrub"..?

Re: VP Axle Goodies Question..
 

my guess would be that you can rotate the axle to get a better pinion angle and these 8° C-hubs and knuckles brings your steering angle back to stock.....but this is ONLY a guess

Re: VP Axle Goodies Question..
 

my thoughts as well but the 8* part seems to be the lower pivoting point on the chubs where the knucks mount,

the "clockable" chubs by axial do what your saying, but i still want to know what the 8* does exactly..

Re: VP Axle Goodies Question..
 

8 degree all the way

Re: VP Axle Goodies Question..
 

because..?

Re: VP Axle Goodies Question..
 

ive just noticed looking at the c-hub pics that they are set at 8 degree so in other words it will set your camber to 8* or push the top of the wheel in at the top.

this thread may help you abit more

http://www.rccrawler.com/forum/vanqu...-knuckles.html

Re: VP Axle Goodies Question..
 

I believe 8* is the kingpin inclination. As you turn the tires tilt over in the direction you are turning.

This example is independent front suspension, so don't pay attention to what it does when he compresses it.

<iframe width="640" height="360" src="http://www.youtube.com/embed/Rvzw5rX50_o?rel=0" frameborder="0" allowfullscreen></iframe>

Good info good info.. So that's what "scrub" is? Sweet cuz I have a major scrub problem, lol

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Re: VP Axle Goodies Question..
 

8 deg of caster means that the top ball joint follows the lower one. So when you rotate the pinion up the ball joints will still have positive on them. You never want to run neg caster. Meaning you don't want the lower ball joint following the top ball joint, or you'll have fun steering it. It will steer its self. The more caster you have the more the tire will lean over. There is a point of too much also.

Leaning the tire in on the top is called camber, vp's don't do camber.

Re: VP Axle Goodies Question..
 

It's inevitable with 4wd locked differentials that the front tires want to push out instead of grab and turn, but you should be able to minimize it by doing a couple things.

UD and/or OD gears, which I think you have, will reduce the pushing effect.

Clockable c-hubs to clock your steering back independently of the axle (more positive caster). This will give a similar effect to the 8* steering parts.

Toe your tires out some by lengthening your tie rod ("true" or positive ackerman) so that the inside tire is turning sharper than the outside. This helps because the inside tire needs to travel in a tighter circle than the outside, so it makes sense that it should turn sharper as well.

Re: VP Axle Goodies Question..
 

The 8* doesn't have anything to do with caster.

The VPs do both camber and caster even if the steering axis were clocked to be perfectly verticle. It's a given amount, depending on the steering angle, created by the kingpin inclination.

Re: VP Axle Goodies Question..
 

You say they have nothing to do with caster, well I just read that they have 10 degs of caster. That means there is 10 degs between the top ball joint and the bottom one. That also means the knuckle leans backwards.

Re: VP Axle Goodies Question..
 

VP's reference to 8 degrees is about kingpin inclination. Which is related to reducing tire scrub as you turn.

http://www.mech.uq.edu.au/courses/me...ng/kingpin.gif

Best info yet! Thanks a bunch! Just ordered a set or 8* degree chubs and knucks guys "thumbsup"

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Re: VP Axle Goodies Question..
 

No, I said the 8* has nothing to do with caster. Again, he 8* is the kingpin inclination, which is the fundamental difference between them and the other knuckles/chubs. This is not the same as caster however it does effect caster (as I also mentioned) even if the "balljoins" were perfectly in line.


Even the stock plastic knuckle/chubs have built in caster, as it's pretty much universal between all combos.

Lol, I'm pretty sure I established that yesterday, but heck...I've only been on these forums for a little while so I must have no idea what I'm talking about. ;-)

Re: VP Axle Goodies Question..
 

I'm just going to take my football and go home!!

I meant the pic lol I'm a simple man with a simple question but your scientific answers are pretty awesome as well "thumbsup"

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