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Old 05-14-2008, 01:09 AM   #1 (permalink)
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Rear coil mounting question on a 4 link

I am going to 4 link the rear of my 87 bronco.

I cant mount the coils on the outside of the frame rail as the tire (38 tsl) will come in contact with the spring under hard flexing.

I would like to go inside the frame rail but i have heard that this will give me some crazy body roll. Opinions? This rig does see (some) street use.

If i run really good shocks or maybe an antirock setup will it be streetable?

If i go under the frame rail I am thinking I will have to run a much shorter coil and also limit my flex.

I have searched and not found much info...BTW my rig still has full sheet metal.

Anyone with some advice I would like to hear it

Thanks

Last edited by Smooth; 05-14-2008 at 01:10 AM.
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Old 05-14-2008, 05:09 AM   #2 (permalink)
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Hmmm. I have an f150 that im going to three link, Im wondering if i will run into that problem also.
Iv herd the same thing, try to steer away form mounting the coils inside the frame rail if possible. Depending on your link design see if it would be possible to mount the coils on the lower links. (Just a sugestion, someone correct me if it shouldnt be done) I do know that by doing so you will have to things such as "leverage theory" and will involve alot more math then you probably expect to get your spring rate right.

or go with air shocks and angle them inward.
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Old 05-14-2008, 08:27 AM   #3 (permalink)
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On a full body bronco air shocks are not going to work, way to heavy.

I have thought about coil over as well but i would have to mount them on the outside also
I will look into the lower link mount idea that is something I have not looked into yet.

Last edited by Smooth; 05-14-2008 at 08:27 AM.
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Old 05-14-2008, 09:21 AM   #4 (permalink)
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Can you use coilovers and space out the wheels to get what you need?
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Old 05-14-2008, 10:18 AM   #5 (permalink)
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How about under the frame with a drop away coil design to get as much droop as you want. Limit strap it and outboard the shocks if they fit and you'll be good with limited body roll on the road.
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Old 05-15-2008, 05:08 AM   #6 (permalink)
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What year is it? I just double checked on my 86 f150, i should have plenty or room.

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Old 05-15-2008, 07:12 AM   #7 (permalink)
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I have thought about the drop away coil design under the frame but I dont want to have anything hanging really low to hang me up.

the truck is a 87 and yes they will hit...under HARD flexing
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Old 05-15-2008, 09:11 AM   #8 (permalink)
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this was on my 89 f350, springs are 13" at ride height just to give you a idea. the shocks are 16" and it used every bit off them.
now i have stock leafs with a shackle flip and it has more body roll than it did with the 3 link, it was real stable before.






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Old 05-15-2008, 10:52 AM   #9 (permalink)
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What would it hang up on. That pic is exactually what I'm talking about.
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Old 05-15-2008, 12:36 PM   #10 (permalink)
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how much flex do you need? This is a buddies, with under mount stock front for van coils with a 4 link

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Old 05-15-2008, 04:14 PM   #11 (permalink)
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thanks for the pics...That under mount looks good!
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