You guys know how I ride... (Z71 Bumpstops inside)

[Alex33]

I would start with 4 at ~3/16-1/4" in size. If that doesn't do it, do 4 more. Max did 8 on the Z71 stops he pictured but that seems like a lot of material to remove right away. I figure if the first 4 don't do the trick, you can always take a little more away.

I'm going to do 4 to start and I'll add more if necessary. Nothing will happen until after this weekend though.

 

[2005SnowKon]

I may do that on Monday, I don't feel like bringing the Kon in the shop. Just wanna go have a cold beer after this hot day we are having in Colorado


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[sparks]

ok all this bumpstop talk got my mind going (like every other good technical thread on this site) so today i took a peek under my truck. to my dismay, i saw that my bumpstops - front and rear - are almost non-existant. the truck is currently stock height, but im lowering soon, **** a belltech 2 and 3/4. do i need to be worried with this drop? i was considering doing the free travel mod in the rear because what i have seen it looks like i wont have much travel without it, but in the front should i be concerned?

 

[Alex33]

You don't have anything to worry about. Just keep it as an option if the setup doesn't ride the way you'd like once it's dialed in.

 

[Tahoewhat]

So, drilled z71 stops are still good and comfortable, but gives to ride quality? What do you mean by that? Interested in the results of all this. As I have untrimmed z71 stops. Handles great, but little jarring as you said. If drilling holes is worth it and makes bumps a little smoother, than im for it.

Just curious about the loss of ride quality?

 

[Alex33]

My thinking is that drilling the stops creates a more progressive feel. I haven't done it on my truck yet, but I have been doing some reading and that's what I've gathered from the comments of those who have drilled their stops.

 

[sparks]

so with more drop, do our trucks ride on the bumps constantly? or is it just because of the reduced clearence that it comes into play a lot more than at stock height?

 

[fire730]

so with more drop, do our trucks ride on the bumps constantly? or is it just because of the reduced clearence that it comes into play a lot more than at stock height?

At stock height they ride on them. So they need to be trimmed some when lowering at all. And drilling the holes make them more progressive like someone else said. Ive had mine trimmed and drilled for well over a year now. But im going to spindles from keys soon so im going to have to get some new ones since mine will be too short.

But they aren't actually stops they are jounce bumpers or some other technical word.

 

[Alex33]

^^^Lots of good info here

 

[Max]

GM calls them jounce stops, they effectively create a progressive supplement to the torsion bar at the end of it's cycle. I drilled a total of 10 holes in my z71 stops and must say the ride quality is the best I've experienced at the current height with my 22s.

 

[Alex33]

Max, what's your hub to fender measure? Do you have full height Z71 jounce stops?

 

[Max]

Yeah they are full height, no idea on the hub to fender but I'm 31.5" ground to fender.

 

[alxs210]

GM calls them jounce stops, they effectively create a progressive supplement to the torsion bar at the end of it's cycle. I drilled a total of 10 holes in my z71 stops and must say the ride quality is the best I've experienced at the current height with my 22s.

What size holes did you drill?

 

[chip]

Does anyone know what the proper adjustment should be on my torsion bars, with a 305/40/22 and 2" shock extenders? I've got some new bumps stops coming and I'd like to know I got it right, if possible.

 

[Nickleahy23]

ya im still on stocks and they dont even touch my djm arms...whats the fix for this? i have a few inches before they are even close, and this thing rides like shit

 

[Alex33]

Does anyone know what the proper adjustment should be on my torsion bars, with a 305/40/22 and 2" shock extenders? I've got some new bumps stops coming and I'd like to know I got it right, if possible.

The best advice I can give is to loosen them as much as you dare and let it ride on the bump stops. That will give you a good starting point as the bump stop will be the "spring". Once you decide you don't like it, tighten up the torsion bars until the torsion bar has enough spring rate to work with the bump stops to give the ride you like. I hate to give you a general only because everyone has different preferences and the best ride is the one you like.

ya im still on stocks and they dont even touch my djm arms...whats the fix for this? i have a few inches before they are even close, and this thing rides like shit

Nick, those arms re-index your torsion bars, right? I would guess you have little effective spring rate in your torsion bar, like adding a 3" drop key to your stock arm. Any pics of your bumpstops with the suspension under load? I think the Z71 stops might be a little taller and could def help once installed.



On another note, I put about 120 miles on my truck today, mostly on the southern California freeways. The one thing I noticed is that the rear makes a lot of noise. I'm guessing from the rear sway bar as I have the axle reloc kit which has done it's job but the sway bar reloc kit has not really worked as I would like. I am almost positive there is a bit of binding back there. I drove a few miles with a full load (8 adults) and bottomed out a couple times on severely off camber bumps and turns and can now see the value in helper bags. The front rode very well, there is a little bumpsteer and some overall slop but I attribute most of that to worn out front end components (another task to tackle). Overall a good experience but I am now anxious to put the truck on a 4-post so I can poke around under it while the front and rear suspensions are loaded to isolate some issues.

BTW, the rear roof rack cap on the passenger side disappeared off my truck somewhere

 

[Max]

What size holes did you drill?

I drilled a total of 10 holes with a 3/8" bit.

 

[Nickleahy23]

well to get the 3" drop from the arms, my keys are almost completely decranked..I wish I would have just gone with spindles and keys to get me at a 3"...there is like a 3-4" gap from the arms to bumpstops..and there is no "pad" on the arms for the bumpstop to rest on

 

[Max]

Don't give up just yet, I'll have a resolution once I install my arms in a few weeks. Got a couple tricks up my sleeve

 

[chip]

The best advice I can give is to loosen them as much as you dare and let it ride on the bump stops. That will give you a good starting point as the bump stop will be the "spring". Once you decide you don't like it, tighten up the torsion bars until the torsion bar has enough spring rate to work with the bump stops to give the ride you like. I hate to give you a general only because everyone has different preferences and the best ride is the one you like.

What do you think about my 2" shock extenders? Shuold I just get rid of them? I want to level the front out (if possible), but ride quality is really the most important thing.

What would you do if you were me?.....................and thanks again!