Adding leafs to a spring pack to gain lift and rate

[WJACKSON11X]

I would like some info on adding some leafs to the rear spring pack. I currently have a 3" TC lift with rear blocks on my Burb. I'm wanting to get rid of the saggy butt. I have some zero rates, but that doesn't seem like the best idea to stack it with the block. Since I'm not liking the soft factory rear springs, I had a thought to maybe add some leafs out of another set of 52's that I have laying around. Has anybody done this and what was the outcome? I'm looking to gain some stiffness and a little lift.

 

[rebelgregory]

Theoretically speaking, the lift you would gain would only be the thickness of the leaves you add. The spring rate would stiffen with each added leaf though.

 

[4xcrazy]

I added two leaves to the rear packs of mine to help cure the saggy rear problem, It helped raise it level to the fronts and also gave me a bit more weight capacity when towing (doesn't sag as easily)

They were off a stock 3/4 ton spring pack. I installed two of the longer ones to help with lift, push the main pack back up. it seemed to work out pretty good.

 

[Blue85]

Theoretically speaking, the lift you would gain would only be the thickness of the leaves you add. The spring rate would stiffen with each added leaf though.

I disagree. If you add rate, you add height by definition unless you are normally riding at the top or bottom of your suspension travel. Say you're at 150lbs/in with 1500lbs on that spring. It should sag 10" from the free arch height. If you add leafs to get to 200lbs/in. Then it should only sag 7.5", so you ride that much higher. Now these numbers aren't perfect because the leaf lengths are staggered and the rate progressive, not linear, but the concept is there.

Plus, then every spring might as well be a monoleaf with a block.

 

[Stomis]

I disagree. If you add rate, you add height by definition unless you are normally riding at the top or bottom of your suspension travel. Say you're at 150lbs/in with 1500lbs on that spring. It should sag 10" from the free arch height. If you add leafs to get to 200lbs/in. Then it should only sag 7.5", so you ride that much higher. Now these numbers aren't perfect because the leaf lengths are staggered and the rate progressive, not linear, but the concept is there.

Plus, then every spring might as well be a monoleaf with a block.