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04-08-2013, 10:55 AM | #1 |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
| VP Axle Goodies Question.. So this might come off as a "newb" question but im just not a VP fanboy and now im curious about these lol i could really careless what brand my parts are as long as they work im happy, especially when theyre cheap so my question is.. so whats the diff between the highsteer zero ackerman knucks.. and whats the diff between the highsteer 8 degree knucks and chubs.. |
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04-08-2013, 11:20 AM | #2 |
Quarry Creeper Join Date: May 2010 Location: scotland
Posts: 345
| 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.
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04-08-2013, 11:28 AM | #3 | |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
| Re: VP Axle Goodies Question.. Quote:
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04-08-2013, 12:26 PM | #4 |
RCC Addict Join Date: Mar 2013 Location: Oklahoma City
Posts: 1,685
| 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
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04-08-2013, 12:35 PM | #5 | |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
| Re: VP Axle Goodies Question.. Quote:
the "clockable" chubs by axial do what your saying, but i still want to know what the 8* does exactly.. | |
04-08-2013, 12:52 PM | #6 |
I wanna be Dave Join Date: Dec 2006 Location: Where the sheep run scared.
Posts: 3,008
| Re: VP Axle Goodies Question..
8 degree all the way
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04-08-2013, 01:27 PM | #7 |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
| Re: VP Axle Goodies Question.. Last edited by Big Tex; 04-08-2013 at 01:30 PM. |
04-08-2013, 02:56 PM | #8 |
Quarry Creeper Join Date: May 2010 Location: scotland
Posts: 345
| 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 Last edited by boohoo; 04-08-2013 at 03:00 PM. |
04-08-2013, 04:15 PM | #9 |
Rock Crawler Join Date: Jan 2013 Location: Cen Cal
Posts: 556
| 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. Last edited by 05Fronty4x; 04-08-2013 at 04:18 PM. |
04-08-2013, 05:26 PM | #10 |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
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Good info good info.. So that's what "scrub" is? Sweet cuz I have a major scrub problem, lol Sent from Outerspace Using My iFreeze Ray Gun |
04-08-2013, 06:01 PM | #11 |
RCC Addict Join Date: Aug 2007 Location: Burbank
Posts: 1,189
| 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. Last edited by The Doc; 04-08-2013 at 06:04 PM. |
04-08-2013, 06:04 PM | #12 |
Rock Crawler Join Date: Jan 2013 Location: Cen Cal
Posts: 556
| 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. |
04-08-2013, 06:08 PM | #13 | |
Rock Crawler Join Date: Jan 2013 Location: Cen Cal
Posts: 556
| Re: VP Axle Goodies Question.. Quote:
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. | |
04-09-2013, 07:36 PM | #14 |
RCC Addict Join Date: Aug 2007 Location: Burbank
Posts: 1,189
| 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.
Last edited by The Doc; 04-09-2013 at 07:56 PM. |
04-09-2013, 08:06 PM | #15 |
MODERATOR™ Join Date: Jul 2004 Location: Ohio
Posts: 18,928
| 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. |
04-09-2013, 08:45 PM | #16 |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
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04-09-2013, 09:35 PM | #17 | |
Rock Crawler Join Date: Jan 2013 Location: Cen Cal
Posts: 556
| Re: VP Axle Goodies Question.. Quote:
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. Last edited by 05Fronty4x; 04-09-2013 at 09:40 PM. | |
04-09-2013, 09:51 PM | #18 |
RCC Addict Join Date: Aug 2007 Location: Burbank
Posts: 1,189
| Re: VP Axle Goodies Question..
I'm just going to take my football and go home!!
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04-10-2013, 07:03 AM | #19 | |
Rock Crawler Join Date: Jan 2012 Location: Mcallen, Tx
Posts: 829
| Quote:
Sent from Outerspace Using My iFreeze Ray Gun | |
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