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

raise rear end

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Old Apr 17, 2001 | 04:41 PM
  #1  
87firebird's Avatar
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From: Indiana
raise rear end

What is the best way to raise my rear end up, but not spend barely any money? And I'm not going to get air shocks. I just want to raise it up about 2 ar 3 inches.

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Old Apr 19, 2001 | 12:04 AM
  #2  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Go look through a Moog spring catalog and find a taller spring similar to a third gen spring. You'll have to put longer shocks on also or maybe shock extensions on the top.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley
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Old Apr 19, 2001 | 10:18 AM
  #3  
TomP's Avatar
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Here's something I've been kicking around (I use air shocks, and love the look, so don't try to dissuade me! )

I remember seeing adjustable springs by a company called Ground Control a few years ago... don't know if they're around anymore. At the basic level, it was a threaded pipe, with a ring around it. You spun the ring up & down the pipe. The spring they included went over the center of the pipe. So, if you spin the ring up, the spring is pushed up.. spin the ring down, the spring's pushed down.

I don't see why something like that couldn't be permanently welded together! I guess the pipe would have to be strong enough, or maybe two pipes should be used. My idea is similar- weld a disc around a pipe, and re-use the stock spring. Remove the lower shock bolts, lower the axle down so the springs are "free", and insert the contraption between the stock spring and axle.

The axle almost has a pipe to it already.. the spring centers around it. So, what if another, thicker pipe was used to rest over the axle's pipe. Then, a flat piece of metal would be welded over the top of the thicker pipe. Then, a pipe the same diameter as the stock piece would be welded on top of the flat piece of metal. Something like:

(stock spring on top)
_|_
|||
(axle's spring mount on bottom)

So.. any opinions? This is probably more cost-effective if you can weld... which I've started to do, what a coincidence!


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
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