Can anyone 'splain how to measure "Arch"??

[HummBebe]

I need to measure the arch on my springs for my add-a-leaf,.

I looked it up, it shows what the measurement is, but I hope I do not have to take off my leafs to obtain the measurement.

Do I?

[wpage]

Did you forget HS Geometry. Get out your protractor and compass and measure the angle. Then plot it. You should be close to factory spec.

[wpage]

Directed angle measure(theta) times radius= arch length

[HummBebe]

Thank you so much, I know how to arrive at the measurement, can I do it crawling under my truck? Or do I have to remove it and measure laying on the ground?

[wpage]

HB,
Check with manufacturer of product. Would make sense to not have to remove it first. However reality and Murphy's law state other factors. Like measure 2x cut once!

[The Green Lantern]

Originally Posted by wpage

Directed angle measure(theta) times radius= arch length

[f5fstop]

Can someone measure this arch for me?

[The Green Lantern]

Originally Posted by f5fstop

Can someone measure this arch for me?

Sure, I probably could.

[Desert Dan]

The spring place should know what the stock specs (width, length, thickness, spring rate and center pin location) are. Then they can make the new spring add a leaf or a whole spring pack. You may nee longer U-bolts too.

Are they going to do the install?

It is allways Springtime Here!

[HummBebe]

You guys are mean......I'm telling.

[stagger_lee]

Im pretty sure you measure at full droop too, so jack up the rear end first.

[HummBebe]

Thank you!!!!!!

[Sewie]

Originally Posted by stagger_lee

Im pretty sure you measure at full droop too, so jack up the rear end first.

You're talking about the truck right?

[stagger_lee]

Originally Posted by Sewie

You're talking about the truck right?

Yeah buddy!

[ree]

Originally Posted by HummBebe

Thank you so much, I know how to arrive at the measurement

What needs to be measured? Can't you do it with a flexible tape while lying underneath the truck?

[stagger_lee]

Originally Posted by ree

What needs to be measured? Can't you do it with a flexible tape while lying underneath the truck?

Unforunately you have to do the math above to insure proper spring rate. You could have 62" leafs on 2 different rigs, but the distance between the hangers could be different. Effects sag, stiffness, recoil, and shock length and travel would also be effected etc. They take the measurements into consideration along with added rear end weight and customer preferences, if getting a custom job. DEAVER baby!

She is just doing an add a leaf, but they would still need the right measurements.

[HummBebe]

Originally Posted by Sewie

You're talking about the truck right?

[Sewie]

Originally Posted by HummBebe

[ree]

Originally Posted by stagger_lee

Unforunately you have to do the math above to insure proper spring rate.

I wasn't advocating doing no math. I was really questioning if you had to remove it from the vehicle. I assume you measure the length along the spring from mount to mount (with a cloth tape) and straight line distance between the mounts....and then do some math. Do you have to do it with the load of the truck on it, or with the spring under no load?

[stagger_lee]

Originally Posted by ree

I wasn't advocating doing no math. I was really questioning if you had to remove it from the vehicle. I assume you measure the length along the spring from mount to mount (with a cloth tape) and straight line distance between the mounts....and then do some math. Do you have to do it with the load of the truck on it, or with the spring under no load?

Sorry, yeah thats what ment in previous post when I said to measure at full droop, or with the load off of the springs.