Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by blazerboy72, Jun 17, 2002.
how can i tell the lift height of a set of springs
i think stock springs only have about 2 to 3 inches of arch.anything above that and you have your inches of lift i think.i think the easiest way to estimate lift would be to measure the center pin tp the center of the spring eyes strait up from the center pin and then subtract 3 inches which would be the stock spring height.just a thought that this way might work.i have a stock spring sitting outside that i just pulled off my truck if you want me to measure how much height a stock spring has.then you can measure yours and compare the arch /forums/images/icons/laugh.gif
1st Gen Lift Measurment
The springs i am lokking at buying are 11 inches from the center pin down if you wouldn't mind measuring yours that would be good <font color="blue"> </font color>
Are you talking about a set of leaves that have no markings on them at all and are not in a truck and the person that has them has no idea of what he has?
If so you need a few measurements
Weight of front end of your truck
free arch of spring (almost what I think you measured)
Spring rate of the spring (which can be calculated if you measure the thickness of the spring, the # of leaves, and the length along the top leaf from eye to eye).
I think it would be easier to just bolt them up and see what happens /forums/images/icons/confused.gif
i just measured my stock springs out of the blazer.they have about 4 inches of arch from the center pin to the bisecting point of the spring eyes.im talking about drawing a line from eye to eye and measureing strait up to that line from the center pin.if you measured this way i described that gives you about 7-8 inches of lift depending on the thickness of the leaves which will give you the spring rate and how much they will droop when installed in the truck.hope this gives you an idea of what you got.
it would be easier to bolt them up and see what happens but i really dont have money to waste max from this board has them and i just wanted to make sure my 38's will fit with them
thanx /forums/images/icons/crazy.gif <font color="blue"> </font color>
I can't say for sure that this works for 1st Gen trucks......BUT...when I was checking for sag on my 8" Skyjacker front springs, they told me to measure "free arch". With the spring off the truck, with the spring eyes on the ground and the centering pin up in the air, measure from the main leaf to the ground. For my 79 8" spring, it was supposed to have around 9" or free arch.
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