3-link 4-link
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Mountain Pass
Joined: Oct 2016
Posts: 172
Likes: 1
From: georgia
3-link 4-link
Hey everyone I’ve been doing really search since I started my project which is a 1977 f100 it has a crown vic itfs and it’s getting a 5.0l coyote out of a 15gt. I need help figuring out he rear end. It’s has a Ford 8.8. From what I read a 4-link has a lot of binding and that’s it is really good for drag racing but not for the track. I read that a 3 link is the beatnik option. The rear end will be getting coil overs my issue is that I’ve found a ton of 4 link kits but almost zero 3 link kits. Wondering if anyone can put me in the right direction.
Cargo Master
Joined: Apr 2010
Posts: 2,600
Likes: 64
From: Billings, MT
Do you still have the crown vic? They have an excellent rear suspension setup. I believe they are parallel 4 link with a watts link.
I would duplicate that as close as you can. Triangulated 4 links have bind; parallel do not but the triangulated is the easiest way to limit side to side travel. On a parallel a panhard bar or watts link control side to side movement. Disadvantage of a panhard bar is the axle moves in an arc sideways through the travel.
a watts link setup moves pretty straight up and down but is more complicated.
I'm a bit rusty on suspension tech but used to be pretty good
I would duplicate that as close as you can. Triangulated 4 links have bind; parallel do not but the triangulated is the easiest way to limit side to side travel. On a parallel a panhard bar or watts link control side to side movement. Disadvantage of a panhard bar is the axle moves in an arc sideways through the travel.
a watts link setup moves pretty straight up and down but is more complicated.
I'm a bit rusty on suspension tech but used to be pretty good
Mountain Pass
Joined: Feb 2003
Posts: 229
Likes: 4
I had a triangulated four-link on my 78. It was built for off-road, but I never experienced binding. For the street and/or track I would use a parallel four-link with a watts bar. With the right calculations you shouldn’t have bind and it will ride nice with little to no wheel hop.
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Mountain Pass
Joined: Oct 2016
Posts: 172
Likes: 1
From: georgia
I don’t, I never had the full crown Vic just picked up the if’s. It seems like there’s a good consensus on a parallel four link and the watts bar. Will start looking at kits for that. Always open to new information
Cargo Master
Joined: Nov 2007
Posts: 2,238
Likes: 475
Truck arm rear suspensions are pretty simple and handle pretty well from what I've read, i believe it's what NASCAR cars have. I'm also a fan of a torque arm rear suspensions. The Vic suspension is a nice set up. I have an 06 Vic with all aftermarket, solid aluminum, rear suspension, bigger sway bar and stiffer shocks. It stays flat and just sticks to the road. I've embarrassed a few mustang owners spanking them on twisty roads, but then they get me in the straights, lol.
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Mountain Pass
Joined: Oct 2016
Posts: 172
Likes: 1
From: georgia
im looking for my information if anyone can point me in the right direction. from what i understand the torque arm rear suspension would be way out of my price range unless im wrong if so educate me. ive been leaning towards doing a custom 3-link but cant find too much literature on the subject and how to do it and what to order. i understand the concept but im looking for more details. i understand any kit i buy 4-link parallel or triangulated will still have to be customized to some point and ive heard nothing but good things from the 3 link system. thanks in advance just craving more information
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