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Old 07-03-2006, 11:55 PM   #11
PBFAB.COM
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Re: Back-half, Corvette C4 in 69

Quote:
Originally Posted by Rokcrln
A few more questions for you if you don't mind. With the vett set up out back what size tire/rim combo will fit between the bed lip and forward control links while still laying frame? Also if you can please explain to us theadvantage of this set up over a solid axel. Handling, bed floor clearance at same givin heights, tire size!

Thanks for your time. Also you have two packages headed your way

Kevin
LFD Inc.

I have not measured the max width tire/wheel combo we can fit back there yet. The new bed-sides and bed pieces will be here next week. I do know that I am running a 295 40R 20 on the blue 55 with a 20x10 and 7" backspacing. At full dump the tire is 1/16" (and that's a generous spec!) away from the stock upper link mounting bolt (the tires toe-in hard at full dump). We will be building our own links on this truck to make clearances a little more acceptable! Advantages to an IRS are all performance. It's true that a strait-axle can handle exceptionally well if set-up properly, but the function of an independently suspended rear is obvious. Advantages are gained in cornering, each wheel is allowed to react independently. As for bed floor clearance, the top of the framerail (2x4) sets 4" above the stock bed floor, and the frame lays on the groud with a 29" tall tire (to achieve this, new tie-rod links are made that relocate to the bottom side of the spindle, or rear hub, whatever you want to call it. If you want to keep stock tie-rod linkage, notch the frame a little, or move the whole thing up an inch). One main advantage to those of us who are afraid of heights and like to minimize the space between our frame-rails and the pavement is that the rear wheels camber in during bump (compression). This allows more clearance at the fender lip, minimizing bed hacking, and maximizing tire width! Besides, how cool is it when all four wheels are cambered in at full dump!!!!
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