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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

help with installing coilovers on rear, custom install experience welcome.

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Old 03-06-2015, 09:46 AM
old_blue1 old_blue1 is offline
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help with installing coilovers on rear, custom install experience welcome.

I have decided to four link my rear end and use coilover springs. I need assistance in how these are installed as far as under compression/preload and how much. The bed will be off the truck so I know the added weight will compress the shocks a little bit I am trying to figure out how much preload the shocks will need. I am assuming at ride height these are at full extension as you would need some rebound shock for when the vehicle goes over speed bumps or high spots.

Anyone with experience let me know what you did and experience. I have never worked with coil overs before so I am a little green in this area.
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Old 03-06-2015, 09:54 AM
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I used the ridetech setup guide to choose spring rates. They generally say that with a threaded shock body, you want the adjustment collar close to center, and same with the shock. You want the shock to be pretty close to the center of its travel at ride height. This is because the suspension not only compresses, but it also extends from ride height, and you dont want the shock to be the limiter on suspension travel.
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Old 03-06-2015, 10:55 AM
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Thanks for the quick reply and explanation. That was what I was referring to but I couldn't find the words. Basically I didn't want tk rear end to kick up like a mule because the shocks would full extend going over a bump.
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Old 03-06-2015, 11:37 AM
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Bottoming out a shock at either end of the travel can permanently damage the internal valving. The suspension should always have mechanical stops that prevent the shocks from bottoming out at either end. Do not remove the bump stops to gain travel or lower the vehicle, contact between axle and frame can cause severe damage and/or loss of control. Also the coilovers should not be installed vertically unless you are building a drag race only chassis. I'd want at least 4" of shock/suspension travel in either direction from at rest position.
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Old 03-06-2015, 12:59 PM
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Installing coilovers

On a streetrod type truck, As in something you are not hauling heavy loads, I would set it up with a 5'' stroke shock. With about 2/3rds of that for compression. Most shock builders will give you a install length. I use ridetech shocks and have had good luck with them. I would put about 1'' of preload in the spring. Hope this helps.
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Old 03-06-2015, 10:31 PM
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Awesome. Thanks for the great information.
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