Anyone know how far the coilovers compress eye to eye? Let's say the compress 9" eye to eye. Then I could install some bump stops above the HCs that would stop the coilovers compression at say 9.5"   
Just want to make sure I don't bottom anything out but still allow for as much articulation in the compression as possible.
I thought I read on another thread that the suspension doesn't move much at all in normal use. Thought I saw somewhere where it said like 4" from ride height. 2" up, 2" down. I can't imagine it only being that but??? Someone school me here.

So we are having a pretty good debate over on the Hamb about the use of trailing arms on the Jag suspension. A member is saying that if the suspension is fixed to the chassis, no bushings, then trailing arms are not needed. And that they will bind as the hub moves in an arch. I just posted this picture I whipped up trying to explane how it forms an A-arm and rotates in the same arch on the same axix/plane. whatever it's called.  Here's the thread.   http://www.jalopyjournal.com/forum/showthread.php?t=556832&page=15

Last edited by IRON MAIDEN (10/14/2012 7:40 pm)

Iron Maiden is right on in the theory of how the radius rods pivot as if they are part of a large A-Arm.
Here is how I attached the radius rods using stock rubber bushings.

This is how the forward ends attach inline with the LCA inner pivots.  This is under a 65 Mustang convertible.

Last edited by irstang (10/20/2012 8:12 pm)

He's gone Iron Maiden. Day took care of it!

Ralphy

Last edited by Ralphy (10/22/2012 11:36 am)

Iron Maiden, both Ralphy and I have posted the following link which further supports how the trailing arm (traction bar) can be set up.  I like the term radius rod, as it helps one understand it should pivot on the same radius center point as the lower control arm.

Australian Street Rod Manual How To Government Guide PDF

https://www.infrastructure.gov.au/roads/vehicle_regulation/bulletin/street_rod.aspx

Last edited by irstang (10/24/2012 2:25 pm)

So $$$ has held up my progress but I've used the time to keep planning it out. I emailed Snow-White to get a price on their crossmember. It was over $300 so I replied asking if they would sell me the top plate mounting setup and also the coil-over mounts they use on their crossmember....... never heard back. So I'm back to fabbing up my own. here is where I'm at. I cut an oversized top plate out of 3/8" plate. I can trim it down and pretty it up once it's been setup. Made a template for the mounting hole. They are 4 1/4" x 3 5/8".  My top plate is 10.5" x 5.75"  I will bush the top plate to the crossmember and the crossmember will be bushed at the frame rails. Here is a mock up of what I'm doing. I am placing an order for all the bushings with DOM sleeves and such to get it done.
 

The Torque Stays will have a Clevis on the Diff Tie Plate and bushed at the frame.
Radius Rods will be bushed at the wishbone (like OEM) and a Spherical Heim at the forward crossmember I plan to build that will also have a driveshaft safety loop on it.
The rear Tie Plate will have support rods that connect up to the Top Plate.

Iron Maiden, the support bars seem over kill because the are supporting the strongest part of the system.  The absolute necessary place support is needed is from the pinion to the frame, preferably at the front of the pinion.
If I find a link for a pinion support, I'll post it.  It can be made with 3/8th plate pretty easily though.

Hi,

Any progress on this build you can share? I am planning the same on an earlier Chevy truck. Can you share some dimensions on used tube and bushings?

Cheers,

Hugo

6 speed wrote:

Iron Maiden,
Remember this thread?
 (installation using many torque stays/bars):
http://irsforum.boardhost.com/viewtopic.php?id=404
Ken

 

 
Hell yes I do! How's it coming along? Sorry I havn't been on here lately. Didn't realize I hadn't updated anything. I made progress but switched gears to my C5 Corvette. Doing heads/Cam/Headers on it right now so the Harvester is just sitting. Here are some pics. Boxed in the rear of the frame. Finished the crossmember and figured out how I'm doing the upper coilover mounts. Keep in mind, it's all just tacked together. I have a Lincoln Mig but only have fluxcore for it. No gas setup yet. So I'm using it to fab everything and will need to finish it all off once I have gas and solid wire. I finally picked up my 1 1/4" DOM tubing from my local offroad parts manufacturer. RuffStuff Specialties. Got all the Heim joints, poly rod ends, clevis ends, tabs to mount it all up.... Also picked up the front and rear tie bars off Speedway. They are 3/8" and have the tabs on the end for my torque stays. I am running stays on the front and rear. The rear stays shown are showing them off the upper plate but I've decided to go off the rear tie bar like the front. I will pick the project up again in January after I finish up the Vette. For whatever reason I felt my stock LS1 wasn't enough power in the Vette so after my upgrades.... should put me 440-460rwhp. That ought to be better ; )
Here's some truck pics. I'll make sure to stop in frequently in case anyone has questions.

Iron Maiden, is the wrapping of the ends your idea? That's pretty cool!



Ralphy

I guess it was my design on wrapping the sleeve with the crossmember. I don't have a hole saw or a way to notch the ends of the square tubing so that the DOM sleeve(bushing tube) flushes in so I came up with this idea. It was a pain but seemed to work out pretty nice and looks good. The upper coilover mounts are notched to slide on the crossmember. They are just tacked as I will be able to play with the angle once the truck is fully loaded. Final weld then.

http://www.ruffstuffspecialties.com/catalog/
They are local to me. About 25 min away.They let me just walk around their parts room as my head spins trying to formulate a plan. lol  I picked up the 1 1/4" OD DOM tubing all custom cut and chamfered @ no extra cost. All the threaded bungs for the rods. All my heim joints which are incredible quality! They have some as big as your fist! All the PU bushings for the crossmember (x4) at the size I asked for (inner and outer DOM sleeves) with mounts for the outer sleeves. Custom cut some poly bushings and sleeves for my trailing arms where they mount to the LCA (factory mount location) so I can make some custom angled rod ends. Then all the different sized mounting tabs for the PU bushings, heim joints, and other rod ends. Their parts are super heavy duty for extreme off road stuff but they have all different sizes and their prices are great. Especially for their Heims!  I ordered up the Clevis ends, and polished SS poly rod ends from Speedway and Summit.