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Old 11-27-2012, 11:46 AM
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Rear Coil Over Shocks Questions - 48 Chevy

I have just finished installing a triangulated four link onto my 48 Chevy pickup, and am now in the process of looking for rear coil over shocks. I used the following equation to determine a rough estimate of the shock sized I would need:

(shock travel) x 66% - distance between mounting points of shock at ride height = compression

and

(shock travel) x 33% + istance between mounting points of shock at ride height = rebound


At Summit Racing I found QA1 Pro Coil-Over Conversion Systems ALN2000K (QA1 Pro Coil-Over Conversion Systems ALN2000K - SummitRacing.com.)

Using my distance between mounting points of the shock at ride height (15 inches) and the travel distance of these shocks (5.125), I calculate my needs to be 16.69 rebound and 11.61 compression.

The shocks from Summit Racing are 16.250 rebound and 11.125 compression.

Have I done my calculations correct, and will these shocks work for my needs?

Thanks,

-A

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Old 11-27-2012, 12:34 PM
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when i was figuring out what shocks to use on my truck I let the axle sit down against the frame, that is as low as it can ever go. then for the extended length i put the truck axle at droop 4" below the ride height, that is the total length of travel for my air bag. i did the measurements from the shock mounts at these heights and went from there. I was looking for shocks though, not coil overs. i went to the monroe site and found the specs chart. easy peezy.
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Old 12-11-2012, 08:25 AM
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We always go for at least 5" of travel in the rear. With our current coil overs that puts you with a 14.5" to 15" drive height. Our 5"" stroke shock compresses to 11.23 extends to 16.43. If you need any help on spring rates let me know.
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