Limiting strap tech (jamnut and spring tech)

Im84 · Nov 5, 2014

Re: Limiting strap tech

My experience with rocks and 54's is that one poly performance quad wrap center limit strap is not enough. Mine were only about 8" long, they stretched very little less than 1/2". But they started fraying at the edges along the sides so ended up with two center straps doubled up front and rear. I've also heard the 1" stretch per foot of strap. Good thread getting ready to buy all four corners and center straps for mine.

Nuts · Nov 5, 2014

Re: Limiting strap tech

Lets move passed the adjustable clevis and spring and make it easy for someone looking at buying straps for each shock. How long of a strap is needed for 14" travel, 16" travel,and 18" travel shocks if you're mounting them at the shock eyes?

Rokcrler · Nov 5, 2014

Re: Re: Re: Limiting strap tech

smbroady82 said:
Goodness...
Look guys.. they are important! I didn't limit mine as soon as we redid the 4 link on mine and I added airshocks, wasn't thinking about limiting them....Idiotic...3 rides in the shaft popped out of the bottom end cap. Sucks.
Limit them 2 inches shorter, they are gonna stretch at least an inch, then you should be in good shape.

You were warned about it and again after we repaired it on the trail

Elliott · Nov 5, 2014

Re: Limiting strap tech

lets back up for just a second tho, There is not a picture one where that clevis would do a damn thing unless im missing something, I could be wrong but the whole idea is for it to keep the strap tight at ride height right, so it doesn't get snagged on something while its flopping around?If that's what it is designed for the spring would have to be on top of the mount so that it would extend the strap in an upward motion,the spring pushing down on the clevis like in your pictures would only keep slop in the strap. And if you put both of the nuts on one side of the mount and use them like jam nuts then every time the axle comes down it would be pulling on the threads that the nuts are threaded on to, and there is no way that you could keep the threads from pulling off like that, But maybe im missing something

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

Elliott said:
lets back up for just a second tho, There is not a picture one where that clevis would do a damn thing unless im missing something, I could be wrong but the whole idea is for it to keep the strap tight at ride height right, so it doesn't get snagged on something while its flopping around?If that's what it is designed for the spring would have to be on top of the mount so that it would extend the strap in an upward motion,the spring pushing down on the clevis like in your pictures would only keep slop in the strap. And if you put both of the nuts on one side of the mount and use them like jam nuts then every time the axle comes down it would be pulling on the threads that the nuts are threaded on to, and there is no way that you could keep the threads from pulling off like that, But maybe im missing something

No. No No. The clevis is used to adjust the stretch (or slack...whatever you want to call the measurement that increases over time) out of the strap.

Say you buy an 12" strap and set it up with the clevis. Works great and limits your droop to 1" shy of max.

A year from now, the strap has stretched and now it IS NOT limiting your droop to 1" shy of max. Solution? Well, with a clevis, you tighten that bad boy up some. If you have no clevis, you order another strap.

Elliott · Nov 5, 2014

Re: Limiting strap tech

I would agree to that if you had a nut on both sides of a tab and adjusted them to take out the slack in a stretched strap but if that's the case and the clevis is tight because of the nuts on both sides of the tab then the springs would serve absolutely zero purpose, I'm guess im going to need to see a picture of this.

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

Elliott said:
I would agree to that if you had a nut on both sides of a tab and adjusted them to take out the slack in a stretched strap but if that's the case and the clevis is tight because of the nuts on both sides of the tab then the springs would serve absolutely zero purpose, I'm guess im going to need to see a picture of this.

You answered your own question. With a nut on BOTH sides of the mount, the spring is not needed. But if you do it that way, there is nothing really stopping the nuts from loosening.

If you double nut the top with no spring, it would work, but nothing prevents the clevis from going up vertically then slamming back down on the two nuts when the axle droops.

If you double nut the top AND have a spin at bottom, the top nut can't come loose AND the clevis can't go vertical allowing the strap to slam it back down onto the nuts.

EDIT. You could also run double nuts on top of mount and under the mount, but that doesn't look near as cool as a spring. laughing1 Personally, I thought ole Dynamightmakehisdeadline Designs described it pretty good.

Elliott · Nov 5, 2014

Re: Limiting strap tech

I'm betting my buggy would pull the threads off of the clevis before it stretched the strap.

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

Elliott said:
I'm betting my buggy would pull the threads off of the clevis before it stretched the strap.

Possibly. That isn't what is up for debate.

Trophy trucks run em. They get used in the Baja 1000. I'd like to think they have stuff figured out.

tommy450r · Nov 5, 2014

Re: Limiting strap tech

How do these guys get away with just running a center limit strap if the shock will not take the load??

I've looked at a bunch of bouncers on the internet an 90% em don't have a strap at each wheel even high end bouncers. Or I just can't see em on there one??

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

tommy450r said:
How do these guys get away with just running a center limit strap if the shock will not take the load??

If you are running a center limiting strap, the FULL weight of the axle isn't ever going to slam at droop because the center limiting strap is supporting some (a lot..) of weight.

tommy450r · Nov 5, 2014

Re: Limiting strap tech

I see what your saying. I was just gonna run center straps on mine but I don't wanna **** up a new coilover because I didn't put limit straps on it.

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

tommy450r said:
I see what your saying. I was just gonna run center straps on mine but I don't wanna **** up a new coilover because I didn't put limit straps on it.

Cheap insurance. The main reason of a center strap is to keep the axle from unloading during climbs.

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

Random pic from the internets. Yes, its IFS, but same concept. Ideally, you want the limit strap as short as possible. Shorter=less stretch.

tommy450r · Nov 5, 2014

Re: Limiting strap tech

Yea that's the reason I was gonna run center straps is the unloading. If bobby tanner Tim Cameron an all them boys don't have trouble I doubt I will. I just didn't know if they had something I didn't know about.

Where is the best place to buy limit straps or a good brand to use? My last buggy just had cheap ebay straps an was fine but it was Toyota ****.

ibrokeit · Nov 5, 2014

Re: Limiting strap tech

tommy450r said:
Yea that's the reason I was gonna run center straps is the unloading. If bobby tanner Tim Cameron an all them boys don't have trouble I doubt I will. I just didn't know if they had something I didn't know about.

Where is the best place to buy limit straps or a good brand to use? My last buggy just had cheap ebay straps an was fine but it was Toyota ****.

http://www.polyperformance.com/shop/Limit-Straps-p-1-c-747.html

Or locally, http://www.wideopendesign.com/Category/355/Limit-Straps.aspx

Elliott · Nov 5, 2014

Re: Limiting strap tech

Wide open Is where I got mine, I run center strap on my front with rockwells with no problems

Dynamite Design · Nov 5, 2014

Re: Limiting strap tech

ibrokeit said:
A year from now, the strap has stretched and now it IS NOT limiting your droop. Solution? Well, with a clevis, you tighten that bad boy up some. If you have no clevis, you order another strap.