Double triangulated 4 link.

[fester]

Hello, first time poster here.
I am attempting to try and do something unusual. I have a '49 F1 I want to run tri4- link under the rear. This is a street machine and not a off road machine. I do not believe i can run the standard single 4 link suspension ( chop and drop is soo overdone). I want to keep my truck at stock ride height. I see no way to keep the lower bars(side view) parallel to the ground. The only way would be to drop and gusset a large chuck of fabricated amalgum 6-7" off the bottom of my frame. And in doing so ruining any clearance i have.

Now I see alot of off road guys use double triangulated bar set up. These set ups let the axle ride well below the frame rails, and the lower bars not level.

How well would a 2x tri4 work for street use?

Yes i have read the tech article here on TRS. Math is easy for me so I do believe I would have a easy time doing a set up.

 

[ZMan]

You can make your upper bars level. I had this same issue when I installed a ladder bar system is my buddies '78 F-100, we just flipped the links over so the front mounts wouldn't have to hang so low. He has had plenty of trips to the dragstrip on it so far with no problems, on top of about 1500 miles street use. The same method would work with your four link.

Heres a pic..

 

[fester]

Flipping

Yeah i was fairly certain they could be flipped. However anything I have read online says to keep the lower link level to the ground. So verification was important here. TRS was the first site that didnt keep the lower link level.

I did some mocking up with some 1.25" pvc pipe last night. The double triangulated still has me intrigued since my leaf spring axle pads sit outside the frame rail. This would be a excellent bracket fabrication spot for minimal axle tub welding. The stock shock mounts for the 9 inch from a 63 f100 are in the lower front of the axle and turned inward 30 degrees( under the frame and pointing inward). Seems perfect for coil overs as long as there is clearance of the upper bars. If the nitty gritty math comes out, it seems i could spot fabricate the whole set up with out even removing the leaf springs.

The differential opening of my axle is studded. The internet seems to lack some sort of mount bracket for the 9 inch to be able to bolt on a upper bars bracket to the rear end. Only thing I can find is for the S-10 crowd. Probably because of the ease of welding to a 9 inch, so they more than likely do not exist.

 

[ZMan]

I mean I can see why people would tell you not to do it, but having actually experienced it, I don't see a problem for a street machine. If it were a full on race car it might not be the best idea, but the way I see it, as long as the bars still have an intersecting point, they should act the same either way.