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Old 10-09-2019, 06:58 AM   #1 (permalink)
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Shock Placement

My front shocks should finally be here any day so I can finish my shock towers. Im not sure how much if any shaft I should have showing at full bump. The shocks are slightly farther out on the axle than the bumps, so at full articulation assuming the Jeep is heavy enough to fully compress the bump it would bottom the shock. My question is should the shock bottom at the same time as the bump when the axle is at full bump on a horizontal plane, or should the shock bottom at the same time as the bump at full articulation? Obviously if it bottoms at full articulation I will loose some usable travel in the go fast stuff.


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Old 10-09-2019, 07:06 AM   #2 (permalink)
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If your shocks bottom at the same time as the bumps with the geometry shown, your shocks will bottom out before the bumps on articulation. Given that geometry you probably want a half inch to an inch of shaft showing at full bump. Ideally you will articulate the axle before welding in the bump stops and shock mounts.
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Old 10-09-2019, 08:36 AM   #3 (permalink)
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"I was told" to leave a inch of shaft on the shock when the bumps are bottomed out in the horizontal plane, that way you won't bottom the shock in articulation.

the bump stock in articulation acts as a pivot point, assuming you won't hit full articulation at substantial speed, it isn't *that* big of a deal to bottom the shock eventually, as it will eventually reach the bottom anyways. if you are on the limit strap on the low side, the bump stop on the high side, the axle can only move until the shock itself is bottomed and then will lift the whole rig
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Old 10-09-2019, 08:56 AM   #4 (permalink)
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Your bump stops may never make any contact when you're in full one wheel bump (articulation).

Ryan at Accutune had me set up the shocks with one inch of shaft showing at full two wheel bump (Horizontal, when the bump stops would stop movement).

During full one wheel bump (articulation), the axle will continue up until the shock bottoms out on it's little rubber bump stopish thing on the shaft.

On my setup, which isn't much different than your picture, the axle never makes any contact with the bump stops during articulation, even though the side that's compressing travels another 2.5" up (at the wheel).
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Old 10-09-2019, 11:04 AM   #5 (permalink)
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Thats what I needed to know. Thanks for the input.


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Old Yesterday, 11:28 AM   #6 (permalink)
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Good info above, and more info in this article:

https://accutuneoffroad.com/articles...fit-coilovers/
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Old Yesterday, 12:38 PM   #7 (permalink)
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Quote:
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the bump stock in articulation acts as a pivot point
I thought those were illegal now



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Old Yesterday, 12:42 PM   #8 (permalink)
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...
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Your ...l).
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since this is a smaller thread with more folks here, mind iffn' I toss a question out to the group? I only quoted yall in the event you have "quote notifications" on while I try to make a complete thought. anybody else, feel free to chime in also

shock angle and eye travel. probably beat to death, but damn I can't find much threads. guess that means it doesn't much matter

my lower link are 42" eye to eye and my axle mounts are 42" eye to eye. with a 14" shock set to 7" up/down, lower links are // to the ground at rest and axle is (hopefully) // at rest as well.

according to triangle rules, 7" of travel equates to just under 10* and with a hypotenuse of 42, I get a same side of 41.5" (about).

in theory, that means to me that my lower shock eye, relative to my upper shock eye, will only move around in about a 1/2" square during travel. i.e. full bump or droop, 1/2" back and full articulation, 1/2" inboard. additionally, it should only travel that 10* as it goes in and out, up and down.

lower shock eye mounts are set square to the axle, so 'at rest' that eye should be about 10* (if we ignore pinion roll)

at full stuff, lower shock eye would then be square and at full droop lower shock eye would be 20* <<<-----does that compute?

should the upper shock eye be set about the same angle? i.e. square to the shaft (centered in travel of joint) at full stuff, ending at 20* full droop.

or, should it be set opposite, i.e. 20* at full stuff, then going towards 0* (90*) at full droop?

follow on, anybody know how much travel a 1/2" spherical end has?
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Old Yesterday, 12:43 PM   #9 (permalink)
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I thought those were illegal now





now legal for 4500 in CA, everybody else...better watch out
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Old Yesterday, 01:34 PM   #10 (permalink)
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If possible, outboard the bump stops so they are inline front-to-rear with the lower coilover tab. The closer you get, the smaller the compromise you need to make. This is how mine are set up:
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