How To? Bumpstops

NOTNSUV · Jan 17, 2014

Forgive me if I've overlooked a "Sticky" on how to check, measure, select and adjust bumpstops. Is there a 'How To' somewhere you can point me to?

I'm figuring you ramp or incline the rig on one front wheel and get within 1/2" of whatever the tire might contact (fender/flare, etc.) and measure the distance between the existing bumpstop and it's normal contact point. Same basic deal with the rear.
If that's correct is it recommended to get the bumpstop equal to that measurement plus the length of the existing bumpstop. Or are there adjustable bumpstops available? What's the best stuff? Even the best can't cost that much.

Thanks for saving me some time and hit/miss on the final touches of my build.

Johnnie Walker · Jan 17, 2014

Search prothanes. Should get you more info you want. They are a nice progressive bump so you will want them taller than your typical bump.

souske · Jan 17, 2014

Pull the spring and measure
You.can guestimate fairly well without doing it, but to get that last bit you have to put in the work.

How fast do you.want to go?

MaxxXJ · Jan 17, 2014

Prothanes, held in by some dom bolted to coil bucket

Inside the coil (not sitting under its own weight)

NOTNSUV · Jan 17, 2014

Did a search (what a concept) and found this article. http://www.rocklizardfabrications.com/Adjusting_Bumpstops.htm
Just happens I already have hockey pucks in the front (I'll just buy more if needed) and the plate pictured at the end for the back (I'll just add stops to that).
Real question was how to measure and that's answered in the beginning of the article.

Thanks for the help guys.

cal · Jan 17, 2014

While measuring is very important, you're wasting your time if you don't do prothanes.

XJEEPER · Jan 17, 2014

All the cool kids run prothanes in the coil........

bluejeepkid · Jan 17, 2014

XJEEPER said:
All the cool kids run prothanes in the coil........

X2

NOTNSUV · Jan 17, 2014

cal said:
While measuring is very important, you're wasting your time if you don't do prothanes.

Any chance you can be more specific for Prothane part numbers or options, front and rear? Been searching vendors. And why they're so superior?

souske · Jan 17, 2014

Look up the thread by slcpunk
All the info you need

NOTNSUV · Jan 17, 2014

souske said:
Pull the spring and measure
You.can guestimate fairly well without doing it, but to get that last bit you have to put in the work.

How fast do you.want to go?

An aha moment. This comment made no sense to me until I finally find a discussion on the Prothane. I'm not racing this and 'go fast' is not part of the equation. I'm looking to bumpstop for offroad, rock crawling, flex situations, not jumping ditches. Guess I could have specified that.
Should I take the tread elsewhere?

Thanks.

souske · Jan 17, 2014

no, its fine here.

I would honestly look into the prothanes though, best $80 i spent on my jeep

XJEEPER · Jan 17, 2014

NOTNSUV said:
An aha moment. This comment made no sense to me until I finally find a discussion on the Prothane. I'm not racing this and 'go fast' is not part of the equation. I'm looking to bumpstop for offroad, rock crawling, flex situations, not jumping ditches. Guess I could have specified that.
Should I take the tread elsewhere?

Thanks.

You mean, wheeling like this?

And yes.....Prothanes work well for this too

I'm running these http://www.jegs.com/i/Prothane/311/19-1705/10002/-1?parentProductId= and at 6" of lift, trimmed off 2 rings to dial them in for my suspension. I made tunable bump plates, which replaced the factory bumpstop, to allow me dial in the proper dampening with the Prothane bumps. http://www.naxja.org/forum/showthread.php?t=985677&page=7

http://www.youtube.com/watch?v=wVJzCQziijA

http://www.youtube.com/watch?v=agR2QQuZXSU

:thumbup:

NOTNSUV · Jan 17, 2014

Weeeellll... sorta. Maybe everything except the airborne stuff. The pucker factor kicked in just looking at those pictures. Age has a funny way of dampening (pun intended) that kind of behavior. Maybe I'll let the sons-in-law do that stuff in my rig and I'll be the cameraman. They love drag racing MY car.

That's pretty impressive for a 'mild' (and clean!) looking XJ.

Thanks for the info

foxwar71 · Jan 17, 2014

XJEEPER said:
All the cool kids run prothanes in the coil........

Cooler kids run air bumps in the coil

Prothanes woulda been my second option though.

zachandandy · Jan 17, 2014

The 6 ring prothanes are only $60 and long enough for most people on 6" or less. They work great in the low speed stuff AND high speed, whereas hockey pucks only work well at low speed. Just because you don't plan any high speed stuff doesn't mean you won't ever want to.

MaxxXJ · Jan 18, 2014

I crawl my jeep too

XJEEPER · Jan 18, 2014

NOTNSUV said:
Weeeellll... sorta. Maybe everything except the airborne stuff. The pucker factor kicked in just looking at those pictures. Age has a funny way of dampening (pun intended) that kind of behavior. Maybe I'll let the sons-in-law do that stuff in my rig and I'll be the cameraman. They love drag racing MY car.

That's pretty impressive for a 'mild' (and clean!) looking XJ.

Thanks for the info

Even with trussed and gusset axle housings and alloy shafts, uni-rail reinforcements, HD steering components, limit straps and dialed-in bumps......I'm pretty selective when and where I fly my XJ. I agree with zacandandy, 6 rings Prothane bumps should work just fine for you.

ert01 · Jan 18, 2014

Another vote for prothanes here. I don't do go-fast stuff either but they are by far the best solution IMHO. They have been one of my more favorite mods.

I'd even risk saying that prothanes are better than air bumps but then we'd have a whole argument about it and derail the thread

haha

You get the benefits of an air bump (progressive dampening) but they're easier to install (just throw em in the coil, remove the factory bump and weld a small plate in where the bump used to be) they're cheaper to buy initially and easier to fix (just replace em if they're worn out somehow) and they don't have the noise that a traditional air bump has.

MaxxXJ · Jan 18, 2014

zachandandy said:
The 6 ring prothanes are only $60 and long enough for most people on 6" or less. They work great in the low speed stuff AND high speed, whereas hockey pucks only work well at low speed. Just because you don't plan any high speed stuff doesn't mean you won't ever want to.

I went with 8 rings with my 4" setup and just cut off what I needed, I cut off 2 rings and reinstalled 1

Prothane 19-1704 Red 6 Ring Coil Spring Insert
http://amzn.com/B003876KV0

How To? Bumpstops

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