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Author Topic: How to force droop?  (Read 2513 times)

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Offline neale_rs

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Re: How to force droop?
« Reply #15 on: May 21, 2008, 08:22:00 AM »
Quote from: Clem on May 19, 2008, 06:24:50 PM
The idea of "forced droop" is addressed by running a quarter elliptical suspension set up. With your set up, there would be no way to force the suspension to articulate. You cannot force the matter by changing the fulcrum. You are trying to exert more pressure on a smaller lever to move a longer lever. The effects will be minimal at best...

A quarter elliptical suspension set up would articulate more, thats for sure.  I still think the regular type spring could arch down a bit more.  After all, the tire going up has weight on it and the one going down usually has very little weight on it so yeah short lever moving a long lever but with a lot of force on the short side and almost none on the long side.  Heavier tires, wheels and axle should also help.

Thanks

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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Clem

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Re: How to force droop?
« Reply #16 on: May 21, 2008, 04:30:14 PM »


Here is my jeep... It flexes fairly well for spring under. It works perfect for my style of driving. The biggest difference outside of spring rates are the addition of boomerang shackles.
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Offline neale_rs

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Re: How to force droop?
« Reply #17 on: May 22, 2008, 07:56:29 AM »


Your flex does look good.  I also have boomerang shackles in the rear, regular ones in the front, all are 5" long, one inch longer than stock.
This is pretty much the full extent of my YJ's droop (with 33s). The upward travel is currently limited by sheet metal.

Rear:



Front:



It isn't too bad but I have seen some SUA jeeps droop a bit more.  This one with 34s is one example, and this is with the sway bar connected!

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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Clem

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Re: How to force droop?
« Reply #18 on: May 22, 2008, 09:26:08 AM »
I had to cut the fenders because I was getting into them. They looked like dog pooh after a few trees (glad I am not in Texas anymore).  I went with the BDS 3.5 lift springs and the 5/8 inch boomerangs from M.O.R.E. That is a 35 in my pic...

That CJ has some mad flex to it for being SUA!

Are you keeping your shackles greased? Are they "over torqued"? Check the spring hanger too. Have your springs had a chance to break in? ie, have you lifted the jeep recently? Springs need some break in time. The track bar could be limiting your down travel. Have you installed a longer or adjustable track bar? Not to hash this over too much, I ditched mine. That is not a recommendation so much as a statement of what action I took. That was the only major difference that stood out to me in pics you posted. CJ's didn't have them, YJ's did.
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Clem

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Re: How to force droop?
« Reply #19 on: May 22, 2008, 09:30:20 AM »
I just saw your sig... No track bars... Scratch that idea.
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Offline neale_rs

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Re: How to force droop?
« Reply #20 on: May 22, 2008, 09:40:13 AM »
I'll give it some time to break in, as you recommend.  The lift has been on for 3 months and has been wheeling 5 times but only 2 of those have been demanding enough to make it flex significantly.  Maybe a few more trips will do the trick, that and making sure there is no over torque.

Thanks
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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Offline chardrc

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Re: How to force droop?
« Reply #21 on: May 22, 2008, 04:51:31 PM »
what is the correct amount to torque down your shekels???? i ask because i thought i had mine pretty tight and then i looked earlier this week and i was missing a nut and the bolt was about to give way :yikes:... since its time to put on the new shakels i fugue i mis as well get it all right now..
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

Offline Jeffy

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Re: How to force droop?
« Reply #22 on: May 22, 2008, 05:26:43 PM »
Quote from: chardrc on May 22, 2008, 04:51:31 PM
what is the correct amount to torque down your shekels???? i ask because i thought i had mine pretty tight and then i looked earlier this week and i was missing a nut and the bolt was about to give way :yikes:... since its time to put on the new shakels i fugue i mis as well get it all right now..

I think the manual says 95lbs-ft but if you use self-locking nuts you can drop it down to say 40lbs-ft.  I know some people tighten them till the bushing is just compressed.    It's really a try and test sort of thing.
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Offline chardrc

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Re: How to force droop?
« Reply #23 on: May 22, 2008, 06:21:35 PM »
ok, thanks... ill probably get some self locking nuts and change the shekels this weekend. and hopefully by then i can get those  :rant: rusty nuts off my sway bar to get the disconnects on....
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

Offline neale_rs

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Re: How to force droop?
« Reply #24 on: May 23, 2008, 07:28:28 AM »
It's good practice to check all suspension bolts just before each wheeling trip (maybe after too although I'm too lazy to do this), this will allow you to run low torque with no problems.  Also the u-joint bolts, I´m convinced a lot of u-joint failures happen because people head out on the trail with those bolts already a bit loose.
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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Offline neale_rs

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Re: How to force droop?
« Reply #25 on: June 23, 2008, 10:17:04 AM »
Finally got around to checking the spring bolt torques.  They were all at about 70 - 75.  I loosened them and retorqued the main eye bolts (4 of them) to 70 and the shackle bolts (all 8) to 55.  I'm hoping to get out on the trail next weekend for testing.  On road it feels like it has softened up, maybe a bit more bump steer, so it seems like it does have some effect.  Do my torque values sound OK?

Thanks

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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Offline neale_rs

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Re: How to force droop?
« Reply #26 on: June 25, 2008, 10:47:09 AM »
I agree.  It bothers me that some mechanics don't take proper torque seriously enough.  I currently own 4 torque wrenches, including a big one that goes up to 250.
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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch
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