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Unread 06-20-2013, 06:29 PM   #31
sk1er18
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5100 adjustable struts

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Unread 06-20-2013, 06:46 PM   #32
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5100 adjustable struts
Price?
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Unread 06-20-2013, 06:47 PM   #33
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Price?
$230 shipped
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Unread 06-21-2013, 12:50 AM   #34
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The new 5100s are the easiest way to adjust the front up .75", 1.5", or 2". If you want .5" or 1" then you can use .25" strut spacers (1 plate = .25" and 2 plates = .5")
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Unread 06-21-2013, 07:31 AM   #35
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The new 5100s are the easiest way to adjust the front up .75", 1.5", or 2". If you want .5" or 1" then you can use .25" strut spacers (1 plate = .25" and 2 plates = .5")
Do the 5100s change the spring rate at all or just move the spring up compared to the lower mount? So there is no way to stack a spacer without different strut mount studs? I wonder if aftermarket strut plates have longer studs...
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Unread 06-21-2013, 07:37 AM   #36
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The 5100s don't change the spring rate. They add preload to the spring by moving the lower perch up closer to the top mount.
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Unread 06-21-2013, 07:55 AM   #37
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The 5100s don't change the spring rate. They add preload to the spring by moving the lower perch up closer to the top mount.
Changing preload theoretically changes spring rate by ultimately making the spring stiffer
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Unread 06-21-2013, 08:03 AM   #38
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Changing preload theoretically changes spring rate by ultimately making the spring stiffer
Negative grasshopper. The "spring rate" does not change, nor does the spring get "stiffer" (which would be from a change in spring rate).

The reason you achieve lift by adding preload is because the unit compresses less as a whole to reach equilibrium.
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Unread 06-21-2013, 08:22 AM   #39
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Negative grasshopper. The "spring rate" does not change, nor does the spring get "stiffer" (which would be from a change in spring rate).

The reason you achieve lift by adding preload is because the unit compresses less as a whole to reach equilibrium.
Ok agree it doesn't changed the designed spring rate but changes the point at when the spring starts to compress making it feel stiffer. The more preloaded the more force it takes for the spring to compress... Like if you add a passenger to a motorcycle add preloaded so the bike won't sag
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Unread 06-21-2013, 08:31 AM   #40
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Ok agree it doesn't changed the designed spring rate but changes the point at when the spring starts to compress
Correct, it changes the point that the assembly starts to compress due to the additional preload.

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.... making it feel stiffer. The more preloaded the more force it takes for the spring to compress...
The reason it feels "stiffer" is a bit more complicated. It has to do with dynamics and energy dissipation. Not because it takes more force for the spring to compress. Since the spring rate hasn't changed, once equilibrium is achieved the spring will still compress the same amount under the same additional weight thats applied (until it starts reaching full compression, then some interesting effects happen which make the spring rate go whacko).
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Unread 06-21-2013, 08:49 AM   #41
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Correct, it changes the point that the assembly starts to compress due to the additional preload.

The reason it feels "stiffer" is a bit more complicated. It has to do with dynamics and energy dissipation. Not because it takes more force for the spring to compress. Since the spring rate hasn't changed, once equilibrium is achieved the spring will still compress the same amount under the same additional weight thats applied (until it starts reaching full compression, then some interesting effects happen which make the spring rate go whacko).
No I totally understand. Just don't want the "feel" of a stiffer spring. The preloaded "makes it feel" like a stiffer spring rate. That's why I got the MD kit
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Unread 06-22-2013, 08:38 AM   #42
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So there is no way to stack a spacer without different strut mount studs? I wonder if aftermarket strut plates have longer studs...
You can use the OEM strut plate studs to with 1 strut spacer (.5" lift), but if you want to use 2 (1" lift) you will need to swap out the studs for longer ones. You can see how I did it here:

http://www.jeepforum.com/forum/f67/o...l#post12813071
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Unread 06-22-2013, 09:04 AM   #43
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You can use the OEM strut plate studs to with 1 strut spacer (.5" lift), but if you want to use 2 (1" lift) you will need to swap out the studs for longer ones. You can see how I did it here:

http://www.jeepforum.com/forum/f67/o...l#post12813071
Yeah IM wondering if aftermarket strut mounts have a longer stud.

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Unread 06-22-2013, 09:30 AM   #44
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Possibly, but installing longer bolts into the OEM plate would be cheaper and you know they would be long enough and strong enough (grade 8). But if you by the aftermarket ones let us know how long the studs are.
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Unread 06-22-2013, 10:18 AM   #45
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Possibly, but installing longer bolts into the OEM plate would be cheaper and you know they would be long enough and strong enough (grade 8). But if you by the aftermarket ones let us know how long the studs are.
They are $34 my cost btw. Don't have access to a welder so idk
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