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Old 02-15-2014, 09:45 AM   #1
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Shock Travel

Been looking at shocks for my lift and there are some things I was hoping a few members could help me with. Trying to figure out how relevant shock travel is. The Metal cloak 6 pack claim this super duper shock travel of 14 inches, but looking at the full extension, it says 28 inches. Looking at Blisten 5100 I see 27.5 inch extended length. So in theory both shocks could drop the same amount. Then that means the real difference would be on the up travel for the other side. And there are couple questions that pop into my head.

1. Does the JK front axle pivot on its center? If so then up travel would have to be equal to down travel, which means it's limited by bump stops, fenders and the max shock compression.

2. On a 3.5 inch lift with 35 inch tires what would be the max compression needed on those shocks for max flex. My wild guess is 10 inches, which is the max travel for a Blisten 5100.

So if my speculations of 1 and 2 above are true Blisten 5100 and most performance shocks would give you as much flex as the Metal Cloak 6 pack.

Then it really comes down to ride and how much I want to spend. Flex is irrelevant.

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Old 03-06-2014, 08:16 PM   #2
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Better late than never right ?


The benefits/Increased "total" travel with the 6 pacs includes up and down travel. You have to look at the shock body length also.
Some (maybe all) res shocks have a shorter body because of the outer reservoir. This will allow more up travel if the bump stops, flares, coil bind, etc don't limit you.

People dont realize, in order to gain full travel (up/down) w/ the 6 pacs. You need to run their high line flares or none at all.

But you are right. Down travel (27-28") will be the same between the two shocks mentioned, for crawling I've seen 1/3 uptravel 2/3 down.
High speed 2/3 up and 1/3 down.

Prob going to get slack for this, IMO the 6 pacs (as sweet at they are) are overrated. You really don't need the up travel. Especially for crawling
And to increase down travel with any length stock, You can replace/modify the mounts to add 1" or more down travel.

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Old 03-06-2014, 09:52 PM   #3
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The Jeep front suspension is a classic 5-link suspension (4 CAs + track bar). It pivots around those links. Laterally it pivots around the track bar mount on the frame and longitudinally it pivots around the control arms brackets on the frame (actually a virtual pivot because the CAs are not equal length).

The amount of droop or flex is dependent on the suspension system design. The shock length is then selected to keep the suspension operating within the design range; not the other way around. If you really want to maximize flex go with coilovers.

I am still waiting for someone to explain what warrants the complexity of all the extra moving parts compared to a more traditional design shocks. Having separate compression and rebound chambers doesn't hold much water and neither does heat dissipation. I would go with the Fox or even better Kings instead.
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Old 03-06-2014, 09:58 PM   #4
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^ I'm thinking the shock body is shorter with the dual shafts allowing the extra up travel. I've seen guys running 12-14" travel shocks With/without modified mounts and getting a s**t tome of down travel.

Long arms will prevent the axles from steering them Selves. Running 13-14" travel shocks w/ the stock arms In the stock mounting positions. You'll be driving one tire on each axle into the pitch seem
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Old 03-07-2014, 05:55 AM   #5
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Quote:
Originally Posted by kjeeper10 View Post
Better late than never right ?


The benefits/Increased "total" travel with the 6 pacs includes up and down travel. You have to look at the shock body length also.
Some (maybe all) res shocks have a shorter body because of the outer reservoir. This will allow more up travel if the bump stops, flares, coil bind, etc don't limit you.

People dont realize, in order to gain full travel (up/down) w/ the 6 pacs. You need to run their high line flares or none at all.

But you are right. Down travel (27-28") will be the same between the two shocks mentioned, for crawling I've seen 1/3 uptravel 2/3 down.
High speed 2/3 up and 1/3 down.

Prob going to get slack for this, IMO the 6 pacs (as sweet at they are) are overrated. You really don't need the up travel. Especially for crawling
And to increase down travel with any length stock, You can replace/modify the mounts to add 1" or more down travel.
That's what I was guessing at the time I asked I was seriously considering the MC lifts and though the 6pac was really cool. The ratios you gave for up travel and down travel make sense as I'm learing more about how the suspension works. It means to get means to get 12 inches of down travel you'd only need to get 4 inches of compression on a shocks resting position. So for flex, extension is more important for a shock than compression making the smaller body shock less relevant.

Thanks!

BTW, what is the shock mount mod your talking about?
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Old 03-07-2014, 06:01 AM   #6
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Quote:
Originally Posted by spinlock View Post
The Jeep front suspension is a classic 5-link suspension (4 CAs + track bar). It pivots around those links. Laterally it pivots around the track bar mount on the frame and longitudinally it pivots around the control arms brackets on the frame (actually a virtual pivot because the CAs are not equal length).

The amount of droop or flex is dependent on the suspension system design. The shock length is then selected to keep the suspension operating within the design range; not the other way around. If you really want to maximize flex go with coilovers.

I am still waiting for someone to explain what warrants the complexity of all the extra moving parts compared to a more traditional design shocks. Having separate compression and rebound chambers doesn't hold much water and neither does heat dissipation. I would go with the Fox or even better Kings instead.
I ended up going with Blistens, because that seemed to be the most used with the RK 3.5 X Factor. I need to do a lot more reading to figure out more about suspensions.

Thanks!
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Old 03-07-2014, 06:02 AM   #7
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Google Nemesis front lower shock mounts and evo rock star rear lower shock mounts. Synergy makes them as well as uppers.
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Old 03-08-2014, 08:29 AM   #8
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One more question. So I got front spring retainers, but what about limiting straps? I bought the Blistens, so I want them to stop extending at about 27" right? How do I go about this?

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