Rear coil mounting question on a 4 link - Pirate4x4.Com : 4x4 and Off-Road Forum

Smooth · 05-14-2008, 12:09 AM

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

weswes01 · 05-14-2008, 04:09 AM

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.

Smooth · 05-14-2008, 07:27 AM

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.

Blown349 · 05-14-2008, 08:21 AM

Can you use coilovers and space out the wheels to get what you need?

colindo94 · 05-14-2008, 09:18 AM

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.

weswes01 · 05-15-2008, 04:08 AM

What year is it? I just double checked on my 86 f150, i should have plenty or room.

Smooth · 05-15-2008, 06:12 AM

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

supervert · 05-15-2008, 08:11 AM

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.

colindo94 · 05-15-2008, 09:52 AM

What would it hang up on. That pic is exactually what I'm talking about.

plug ugly · 05-15-2008, 11:36 AM

how much flex do you need? This is a buddies, with under mount stock front for van coils with a 4 link

Smooth · 05-15-2008, 03:14 PM

thanks for the pics...That under mount looks good!

05-14-2008, 12:09 AM	#1 (permalink)
Smooth Registered User Join Date: Aug 2006 Member # 78440 Posts: 54	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 12:10 AM.

05-14-2008, 07:27 AM	#3 (permalink)
Smooth Registered User Join Date: Aug 2006 Member # 78440 Posts: 54	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 07:27 AM.

05-14-2008, 08:21 AM	#4 (permalink)
Blown349 Registered User Join Date: Jan 2007 Member # 85036 Location: Littletown Crawlorado Posts: 656	Can you use coilovers and space out the wheels to get what you need? __________________ Da "Carcass" Built by Swat. [url]http://www.supermotors.net/vehicles/registry/3612[/url]

05-14-2008, 09:18 AM	#5 (permalink)
colindo94 Registered User Join Date: Jul 2007 Member # 94764 Location: Cameron Park, CA Posts: 79	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. __________________ 1994 ford explorer, Full width dana 44/8.8, 36" TSL CAMERON PARK CRAWLERS

05-15-2008, 04:08 AM	#6 (permalink)
weswes01 Registered User Join Date: May 2008 Member # 113388 Posts: 125	What year is it? I just double checked on my 86 f150, i should have plenty or room. Last edited by weswes01; 05-15-2008 at 04:14 AM.

05-14-2008, 04:09 AM	#2 (permalink)
weswes01 Registered User Join Date: May 2008 Member # 113388 Posts: 125	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.

05-15-2008, 06:12 AM	#7 (permalink)
Smooth Registered User Join Date: Aug 2006 Member # 78440 Posts: 54	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

05-15-2008, 08:11 AM	#8 (permalink)
supervert Rock God Join Date: Dec 2005 Member # 63840 Location: olivehurst Posts: 1,065	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.

05-15-2008, 09:52 AM	#9 (permalink)
colindo94 Registered User Join Date: Jul 2007 Member # 94764 Location: Cameron Park, CA Posts: 79	What would it hang up on. That pic is exactually what I'm talking about. __________________ 1994 ford explorer, Full width dana 44/8.8, 36" TSL CAMERON PARK CRAWLERS

05-15-2008, 11:36 AM	#10 (permalink)
plug ugly Zeus of the Sluice Join Date: Jan 2003 Member # 16680 Location: Rocklin Posts: 2,818	how much flex do you need? This is a buddies, with under mount stock front for van coils with a 4 link __________________ 94 Mall Rated Bronco-R.I.P. 1961 Scout 80 stretched and linked wt4x4.com PM me for CPR/First Aid Instruction for you club

05-15-2008, 03:14 PM	#11 (permalink)
Smooth Registered User Join Date: Aug 2006 Member # 78440 Posts: 54	thanks for the pics...That under mount looks good!

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