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Old 02-26-2014, 08:29 PM   #1
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Default 4 link Pan Hard?

Tired searching but couldnt find an answer. So sorry if its a noob question..... But im running VP's 4 link, I want to upgrade to their CMS bumper mount. Do I need to run a panhard if I get their bumper mounted CMS even though im running their 4 link?
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Old 02-26-2014, 08:37 PM   #2
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Default Re: 4 link Pan Hard?

You don't need the pan hard to run a CMS, the 4-link keeps the axle centered, but the bump steer might be pretty bad. My first rig I built was CMS and 4 link and a few guys commented that the geometry wasn't right at my first scale comp.
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Old 02-26-2014, 09:02 PM   #3
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Default Re: 4 link Pan Hard?

How would I go about correcting the bump steer? Or is it really not that big of a deal?
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Old 02-26-2014, 09:08 PM   #4
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Default Re: 4 link Pan Hard?

I'm not sure how you'd do it on a 4-link CMS setup, it might not be too bad. You always have a little bit of bump steer with a CMS, it's just a matter of reducing it as much as you can. I think you'll be fine with that setup, the VP CMS bumper mount is nice, have one on my JK.
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Old 02-26-2014, 09:11 PM   #5
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Default Re: 4 link Pan Hard?

Quote:
Originally Posted by Case182 View Post
How would I go about correcting the bump steer? Or is it really not that big of a deal?
Here is what bump steer looks like with a 4-link setup.
SCX10 Bump Steer - YouTube
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Old 02-26-2014, 09:21 PM   #6
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Default Re: 4 link Pan Hard?

Hmm, just going to try out the bumper mount CMS and see how it goes. It not ill just switch back to axle mount. Thanks guys.
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Old 02-26-2014, 09:26 PM   #7
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Default Re: 4 link Pan Hard?

The pan hard setup works better because the axle actually is pushed to the side a bit under compression, the 4-link fights this and it can bind up a bit.
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Old 02-26-2014, 09:29 PM   #8
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Default Re: 4 link Pan Hard?

So I should switch back to a 3 link front with pan hard?
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Old 02-26-2014, 10:03 PM   #9
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A

Three link with a panhard bar will let the axle move to side which will eliminate most of the bump steer.
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Old 02-26-2014, 10:12 PM   #10
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Default Re: 4 link Pan Hard?

That video is a perfect example of a bad setup, thanks for posting what I was explaining. Yeah, go 3 link and pan hard, not the y-link setup or 4-link.
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Old 02-26-2014, 10:45 PM   #11
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Default Re: 4 link Pan Hard?

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Originally Posted by Ty@Tekin View Post
That video is a perfect example of a bad setup, thanks for posting what I was explaining. Yeah, go 3 link and pan hard, not the y-link setup or 4-link.
Sounds like thats what has to happen then? You know of a good pan hard kit to get? Vp doesnt sell theirs separate for stock axles. They have one for the Curries though. If they do I cant find it.

Last edited by Case182; 02-26-2014 at 10:48 PM.
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Old 02-26-2014, 11:32 PM   #12
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Default Re: 4 link Pan Hard?

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Originally Posted by Case182 View Post
Sounds like thats what has to happen then? You know of a good pan hard kit to get? Vp doesnt sell theirs separate for stock axles. They have one for the Curries though. If they do I cant find it.
My recommendation is to use the CMS kit from RC4WD. It includes the servo mount, the panhard and the top link for the 3 point link.
RPP Hobby | Radio Controlled Cars, Trucks, Boats, Helis, Planes, Plastic Models

GCM racing sells a pan hard kit that has just the brackets. You have to provide the link for the pan hard and the top link to make the front 3 link with a single top link (Not a triangular 3 point)
GCM Racing WebStore-2013 - Axial Panhard Kit
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Old 02-27-2014, 12:25 AM   #13
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I second the rc4wd cms setup. I have it on my rubicon and it works great. Only needed minor modification to the left front bumper mount to make a perfect fit. I would do it again in a heartbeat!
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