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Old March 2nd, 2013, 03:44 PM   #1
92FleXj
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Coilover question

Last year I bought new coilovers for the rear of my jeep this year I would like to do the front, which is currently air shocks. I get a lot of body roll because I don't run sway bars as it is a trailer queen and never road driven.
My question is this, Would my vehicle be more stable if I ordered coil overs and ran 50% droop and 50% up travel? My rear is 80% droop 20% up travel. I think I remember a thread on hard-line crawlers that said it would be more stable at 50-50 but then again I read that on the Internet.
I'm looking for answer from somebody who has experience with this issue and not somebody who's friend of a friend new this guy that one time this thing happen to.
Any help would be great thanks.
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Old March 2nd, 2013, 04:25 PM   #2
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are your coilovers still pointing to the middle of the truck in the rear. thats where i would start if you are still running that setup
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Old March 2nd, 2013, 04:33 PM   #3
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No, straight up and down now
After I changed it it did not feel any deferent. But I like the look of this better.
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Old March 2nd, 2013, 04:35 PM   #4
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And to be honest I've seen coilovers on extreme angles a lot lately. I came across this pic online the other day.
I defiantly like the look of mine better. And I had the room to do it so it would have been stupid not to.
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Old March 2nd, 2013, 04:40 PM   #5
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I have 16" Pro Fenders on the rear. I can put 16s on the front too but they would be 20%up 80%down. My bumps will stop me at 20 anyways and my straps will limit me at 55-60.
If I went with a 12 or 14" coilover I would e closer to 50-50 with a more firm spring.
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Old March 2nd, 2013, 04:53 PM   #6
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there is very little difference in body sway with a coilover vs an air shock. (without a sway bar) body roll is 100% controled by valving, which air shocks and coilovers both have. The only difference is that an air shock is going to experience heat fade much faster than a coilover.
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Old March 2nd, 2013, 05:06 PM   #7
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Old March 2nd, 2013, 05:24 PM   #8
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I should clarify too. When I say body roll I don't mean driving 55 and turning a corner.
I'm saying when I get in an off camper position, like the hole jeep is sideways on a hill it flops down hill. And the suspension unloads.
When I added oil to the fox air shock it helped a lot. But now they don't work properly because I had to add the max amount of oil to help stable the truck.
I'm doing coilovers and if that don't fix or help majorly, than ill be calling currie shortly after.
What makes me question everything over and over again. is that there are a lot of people that don't run sway bars and don't have the same issues do..
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Old March 2nd, 2013, 05:51 PM   #9
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Quote:
Originally Posted by 92FleXj View Post
When I added oil to the fox air shock it helped a lot. But now they don't work properly because I had to add the max amount of oil to help stable the truck.
this confuses me. There really isn't a variable amount of oil to add to an air shock. They should have a set amount of oil in them at all times (basically the max amount that does NOT hydrolock the system at full bump). The volume of oil shouldn't be a tunable knob. The type of oil, or viscous rating of the oil, is a tunable knob, but it's not worth playing with. Valving is really what you need to focus on. Ther eis a huge different in fast vs slow valving.

In regards to "unloading". Both a coilover and air shock is going to unload.
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Old March 2nd, 2013, 06:11 PM   #10
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Quote:
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this confuses me. There really isn't a variable amount of oil to add to an air shock. They should have a set amount of oil in them at all times (basically the max amount that does NOT hydrolock the system at full bump). The volume of oil shouldn't be a tunable knob. The type of oil, or viscous rating of the oil, is a tunable knob, but it's not worth playing with. Valving is really what you need to focus on. Ther eis a huge different in fast vs slow valving.

In regards to "unloading". Both a coilover and air shock is going to unload.
I had air shocks on my last rig and Jesse tuned them for me one day I was at the badlands. He added more oil also and it made a world of difference.
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Old March 2nd, 2013, 06:27 PM   #11
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Quote:
Originally Posted by jhnyquest View Post
I had air shocks on my last rig and Jesse tuned them for me one day I was at the badlands. He added more oil also and it made a world of difference.
interesting. Any reason you were running "less" oil at the beginning? Every coilover company I have delt with tells you how to add the correct amount of oil when you revalve them. I have never heard of people running more or less oil for tuning, unless you have bypasses...
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Old March 2nd, 2013, 06:32 PM   #12
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I was running what they came with. Jesse added more oil and it helped with body roll.
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Old March 2nd, 2013, 06:42 PM   #13
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I was told by Fox to add more oil to make them more firm. I fully collapsed my shocks and filled them
Up. That's what he told me to do and it made the world of deference.
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Old March 2nd, 2013, 07:09 PM   #14
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yes oil level changes dampening in a air shock just like a air bump. coil overs are different set amount of oil and adjust dampening with the piston. thats what i have been told at least. and in my air bumps i lowered amount of oil and it softened them. nitrogen charge is the intial stiffness and oil level sets at what point the dampening gets firmer in a air bump.
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Old March 2nd, 2013, 07:15 PM   #15
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Quote:
Originally Posted by 92FleXj View Post
And to be honest I've seen coilovers on extreme angles a lot lately. I came across this pic online the other day.
I defiantly like the look of mine better. And I had the room to do it so it would have been stupid not to.
notice how wide on the axle the shock mounts are, i would think this would help a little with stability. im guessing your shocks are not vary far apart on your axle. Also is there any chance your link geometry is causing some instability. or maybe your rig is just tall and you are quite top heavy. if you cant find anything i gaurantee a sway bar would help.
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Old March 2nd, 2013, 07:18 PM   #16
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Quote:
Originally Posted by 92FleXj View Post
I was told by Fox to add more oil to make them more firm. I fully collapsed my shocks and filled them
Up. That's what he told me to do and it made the world of deference.
yes, basically put the max amount of oil in them at full compression. That is how much oil everyone adds after a revalve. I just had no idea that a coilover OEM would ship coilovers/air shocks with less oil than that.
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Old March 2nd, 2013, 07:21 PM   #17
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Quote:
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notice how wide on the axle the shock mounts are, i would think this would help a little with stability. im guessing your shocks are not vary far apart on your axle. Also is there any chance your link geometry is causing some instability. or maybe your rig is just tall and you are quite top heavy. if you cant find anything i gaurantee a sway bar would help.
My air shocks are straight up and down as far out as they can go. But they are 18" with only 3" of the shaft showing at ride Hight. I lowered it from how it was when I got it.
As for geometry I don't know. It was on the jeep when I got it
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Old March 2nd, 2013, 07:26 PM   #18
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Why couldnt you move them wider at the axle? yea you will probably have to go thru the unibody rails and box them back in around shock holes but it is possible. if you dont want to do all that just put a sway bar on the back and be done.
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Old March 2nd, 2013, 09:45 PM   #19
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Quote:
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Why couldnt you move them wider at the axle? yea you will probably have to go thru the unibody rails and box them back in around shock holes but it is possible. if you dont want to do all that just put a sway bar on the back and be done.
Air shocks are on the front. Widening my coilovers 3" will not fix what I'm talking about.
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Old March 2nd, 2013, 09:57 PM   #20
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sounds like a geometry problem along with lack of shock tuning
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