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View Full Version : any negatives on running both rear shocks behind the rear end??



JustinB
12-14-2007, 08:36 PM
I have a 69 camaro and after looking at my rear setup in is going to be impossible to run a staggered rear shock setup in the factory locations. I has a 9" rear and the way the rear disc brakes mount there is not enough room to run the shock past the caliper. The car has rear upper shock cross member welded in place and I was thinking I could just get a set of the DSE minitub lower shock plates and run the shocks behind the rear end. Basically relocating the lower shock mount inside the leafspring. Is there anything I need to be wary off going into this. The car is not mini tubbed and has a leaf spring setup. Thanks for the help.

High Plains Mopars
12-15-2007, 10:27 AM
Well, Ford and Mopar have been doing this for decades without any ill effects.

Lowend
12-15-2007, 12:08 PM
It tends to make the rearend hop around more under acceleration and braking

David Pozzi
12-16-2007, 03:05 PM
My 67 has both shocks ahead of the axle. Nothing but wheel hop until I put some good leaf springs on it. I think you'll do OK if you use Hothckis or Global West leafs.
David

GetMore
12-16-2007, 04:19 PM
I read something by someone (world of information, aren't I?) that said that GM used staggered shocks to eliminate wheelhop, but it wasn't an issue with other makes. It was a design fault. I understand that it is a spring issue.

Isn't there a spring guy here that can elighten us?

Sparky67
12-16-2007, 04:35 PM
Before I mini-tub my 1967 Camaro. The shocks were relocated inside the springs and were behind the axle. The shocks were vertical and attached to the crossmember. Anyway, I was going to run to race the car, and it was setup with Calvert traction bars and Landrum springs. Actually, the quadra-link setup, the shocks are behind my Ford 9-inch.

Jeff

http://www.kodakgallery.com/67rscamaro

chassisguy
12-16-2007, 07:09 PM
The location in the front of the rear end puts more weight on the shocks cause it is closer to the Center of the car, so putting them behind the rearend is going to lighten the load a little but, depending on what your going to be doing with the car is going to depend on if it will effect you. So whats the plans with the car?

TPI Monte SS
12-16-2007, 08:13 PM
Interesting topic here. My Jeep Cherokee has a leaf-sprung rear, and has the staggered shock setup. My Monte has the stock 4-link rear suspension, and both shocks are behind the rear axle. I think either way works fine in most situations.

My Cherokee used to have bad wheel hop issues with the OEM shocks and crappy off-road tires. Once I installed the Bilsteins and street tires, the wheel hop disappeared. The Monte does not have a wheel hop issue, just a traction issue. It spins the tires very easily, but they (fortunately) do not hop. Wheel hop will do some damage; wheel spin just kills tires. :)

zbugger
12-16-2007, 08:19 PM
Aren't you running the DSE springs in the rear? If so, it should be ok to run those shock plates. If you look at the DSE mini-tub kit, it runs the rear shocks behind the rear axle. Their springs, if I remember correctly, are also slightly biased to the front to act against wheel hop. I know both Global West and Hotchkis are.

JustinB
12-16-2007, 09:47 PM
Yes I am going to be running DSE springs.

protour73
12-17-2007, 08:39 AM
I have a 69 camaro and after looking at my rear setup in is going to be impossible to run a staggered rear shock setup in the factory locations. I has a 9" rear and the way the rear disc brakes mount there is not enough room to run the shock past the caliper. The car has rear upper shock cross member welded in place and I was thinking I could just get a set of the DSE minitub lower shock plates and run the shocks behind the rear end. Basically relocating the lower shock mount inside the leafspring. Is there anything I need to be wary off going into this. The car is not mini tubbed and has a leaf spring setup. Thanks for the help.

are you running Wilwood rear discs, by any chance? if so, see this thread....... https://www.pro-touring.com/forum/showthread.php?t=37434 read through it, I was running into the same issue on my 2nd Gen Camaro, with a Moser 12bolt, with staggered shocks.

strtlegal
12-18-2007, 01:10 PM
I have a 69 camaro and after looking at my rear setup in is going to be impossible to run a staggered rear shock setup in the factory locations. I has a 9" rear and the way the rear disc brakes mount there is not enough room to run the shock past the caliper. The car has rear upper shock cross member welded in place and I was thinking I could just get a set of the DSE minitub lower shock plates and run the shocks behind the rear end. Basically relocating the lower shock mount inside the leafspring. Is there anything I need to be wary off going into this. The car is not mini tubbed and has a leaf spring setup. Thanks for the help.

tobin @ kore3 industries sold me two right hand calipers...unfortunately your calipers will mount differently, one side will be in the front and the other in the rear...havent switched mine yet, but he would be the man to talk too if you dont want to change your shocks mounting location..

kore3
800.357.5467

Norm Peterson
12-19-2007, 08:14 AM
I read something by someone (world of information, aren't I?) that said that GM used staggered shocks to eliminate wheelhop, but it wasn't an issue with other makes. It was a design fault. I understand that it is a spring issue.

Isn't there a spring guy here that can elighten us?Not really a spring guy, but it does make sense from a structural analysis point of view. It's a stiffness/frequency sort of thing. A leaf spring has at least two different stiffnesses of interest, and they both depend on things like leaf length, width, and thickness. Get the stiffness that has to do with control of pinion angle a bit wrong and add some longitudinal compression due to traction and you're likely to get into wheel hop. Staggering the shocks does not eliminate the cause of wheel hop - it only works to keep it from getting out of control once any motion or vibration of the axle housing about the axles themselves does start - so it's really just a band-aid of sorts.


Norm