Suspension and Chassis Questions about your suspension? Need chassis advice?

Spohn Rear Coil Over Kit

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Old Aug 7, 2005 | 09:50 PM
  #1  
KagA152's Avatar
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
Spohn Rear Coil Over Kit

Anybody else have one of these? I was wondering where/how the reinforcement plate should be welded, just a few spots, or more? Heres a pic of it from thier site


Hopefully somebody will see this, otherwise I guess I will just call tomorrow. Then all I need is the brake brackets and hubs from ebmiller (pm if you see this) and the car will be back on the ground
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Old Aug 7, 2005 | 11:15 PM
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From: SW Chicago 'burbs
Car: American Iron Firebird
Engine: The little 305 that could.
Transmission: Richmond T-10
Axle/Gears: Floater 9" - 3.64 gears
Are you running an interior? If not, I'd probably just bolt it in with four bolts just in case you decide to switch setups or sell it.

I don't have any experience with them though.
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Old Aug 11, 2005 | 09:58 AM
  #3  
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From: West Warwick RI, postal code: 02893
Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
Kinda bumping this up, but that looks like it would be a great set up. i am currently trying to stuff, 335's under my car, and have it all tuck in. I am trying to invent some kind of minitub. But the damn coil springs are what I am about to hit now. Any chance you can post pics of this set up in your car.


I would fully weld the entire plate. But that is just me. I can also weld myslef, and know for a fact that i am NEVER going to sell my car.
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Old Aug 11, 2005 | 10:25 AM
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
well, what i ended up doing was welding as much around the circle as i could, as much in the front and rear, and also a bit on the side. it was very hard for a couple reasons, 1. no room to work, 2. overhead. i had never done anything over head before, the welds look like hell, but theyre solid for the most part
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Old Aug 11, 2005 | 11:02 AM
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Its actually my design I e-mailed to Spohn.

I actually suggested having bolt provisions screwed into it so you have the option to either bolt it in place or weld it based on yoiur preference for possible future removal (In the case of a racing class not allowing for a coilover setup in the rulebook)

He did not opt to put the drilled mounting holes into it, weld-on only. It only needs to be tack welded in a few 1inch increments around the outside of the plate edge so you do not overheat and warp the chassis sheetmetal.

Here's my prototype sketch I posted on this website a few years ago on this idea-
Attached Thumbnails Spohn Rear Coil Over Kit-pictures-440.jpg  
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Old Oct 8, 2005 | 09:43 PM
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
so with everything finally on the car, even with the spring all the way down on the shock, the car is still as high if not higher then stock in the rear would it be possible to run a 10" spring instead of the 12". prolly a better question for spohn, but if anybody on here knows.
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Old Oct 10, 2005 | 01:42 AM
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From: Mass
Car: 91 Z
Engine: Somethin Nice!!
Transmission: T56
is there any clearance problems with that spring and a thich rear sway bar? from the looks of that pic it looks pretty damn close if the spring was lowered all the way... i have the thick Spohn Drag rear sway bar
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Old Oct 10, 2005 | 02:49 AM
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
yes, it is very close with my 24mm. anybody know the answer to my question?
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Old Oct 10, 2005 | 11:45 AM
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From: Western Maryland
Car: 82z28
Engine: 406
Transmission: th350
Axle/Gears: 3.23
I dont know, but be sure to let us know what you figure out.
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Old Oct 15, 2005 | 07:34 PM
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From: Western Maryland
Car: 82z28
Engine: 406
Transmission: th350
Axle/Gears: 3.23
have you heard from spohn about this yet?
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Old Oct 16, 2005 | 01:03 PM
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From: Upland Pa
Car: Camaro Vert
Engine: 355 HSR
Transmission: A4
Axle/Gears: 3.73 S60
sure you can run a 10" spring.. You'll prolly have to get a stiffer rate spring though.

When ya get it driving and racing, take it to the track and get the weight of the rear of the car, and then you'll be able to figure out exactly what you need for your car.

Sounds like ya removed a lot of weight in it.
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