Measuring resting shock length?
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Freshman User
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From: Maryland
Measuring resting shock length?
I shimmied under the truck the best I could and the rear shocks, from eyelet to eyelet, are about 12.5" They are at quite an angle, I'm guessing roughly 45 degrees. Since the frame is notched, I'm guess the mounts have been relocated. However, I don't have anything to reference for stock 1967 rear shock mounts.
The front shocks, do you measure them from eyelet to tip, or eyelet to "center of bushings?" They are about 14.5" to the tip, but since they are mounted on truck it's hard to measure to bushings. Maybe 13 to 13.5"?
Thanks guys!
The front shocks, do you measure them from eyelet to tip, or eyelet to "center of bushings?" They are about 14.5" to the tip, but since they are mounted on truck it's hard to measure to bushings. Maybe 13 to 13.5"?
Thanks guys!
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
To properly measure for shock length, you'll need to do it at theoretical full compression and a real full droop. Because the shocks are mounted at an angle, some trigonometry is involved because the shock angle is the hypotenuse of right triangle.... sine, cosine, tangent!
Full compression..measure eyelet to eyelet and then account for full compression - the distance from the axle tube to the bumpstop up inside the C-notch. Calculate.
Full droop... simply put the frame on jackstands with the tires off the ground and measure - again, eyelet to eyelet and the distance between the axle tube and bumpstop. Calculate.
Then hit up the shock manufacturer's catalog that contains the shock specs (measurements & PNs) at full compression and extension.
Alternatively, give the guys at shockwarehouse.com and let them know what you're looking for and I am sure they can find the correct shocks.
Full compression..measure eyelet to eyelet and then account for full compression - the distance from the axle tube to the bumpstop up inside the C-notch. Calculate.
Full droop... simply put the frame on jackstands with the tires off the ground and measure - again, eyelet to eyelet and the distance between the axle tube and bumpstop. Calculate.
Then hit up the shock manufacturer's catalog that contains the shock specs (measurements & PNs) at full compression and extension.
Alternatively, give the guys at shockwarehouse.com and let them know what you're looking for and I am sure they can find the correct shocks.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
Oh, I forgot to add that you should aim for at least 60 percent of the travel should be compression since I wouldn't expect that ya get that puppy airborne as to over-extend the shocks.
For example, if the difference between full droop and full compression is 8 inches, then at rest it should be only compressed about 3 inches.
For example, if the difference between full droop and full compression is 8 inches, then at rest it should be only compressed about 3 inches.
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