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Heaph's Build Thread - Built not Bought
- Thread starter chiefheaphy
- Start date
Can you also provide a measurement of the "loaded arch" value? This is basically done by holding a straigtedge across the centerline of the two spring eyes and then measuring straight down to the base of the leafspring where it sits on the spring perch.
I have a feeling that we're going to have to make some assumptions about how much those springs will ever flex. If they were truly capable of laying-out flat, you'd probably beed something like a 20" long shackle!!!
The spring rate is probably VERY high, so it doubtful you'd be able to get more than a few inches of compression If you want to take an accurate mesaurement of the leaf thickness (assuming all leafs are the same thickness) and the overall count of leaves per pack, I can do a pretty accurate calculation of your actual spring rates also.
Can you also provide a measurement of the "loaded arch" value? This is basically done by holding a straigtedge across the centerline of the two spring eyes and then measuring straight down to the base of the leafspring where it sits on the spring perch.
I have a feeling that we're going to have to make some assumptions about how much those springs will ever flex. If they were truly capable of laying-out flat, you'd probably beed something like a 20" long shackle!!!
The spring rate is probably VERY high, so it doubtful you'd be able to get more than a few inches of compression If you want to take an accurate mesaurement of the leaf thickness (assuming all leafs are the same thickness) and the overall count of leaves per pack, I can do a pretty accurate calculation of your actual spring rates also.
I am pretty sure they will never even come close to flat but they can and will flex and he need to give it more than just a 4" shackle.
If you can get an estimate on the spring rate that would help a lot.
ANd for the panhard bar, yeah you want to make it as horizontal as possible, but now I am thinking you could also do a "De Dion" setup, that will give you a better centering of the axle all thru your up down travel
They are using this setup on Dodge durango now if you want to see what it's like
chiefheaphy
1/2 ton status
Measurments:
Rear leaf-
50" eye to eye
67" along main leaf
24" loaded arch
11 leafs
about 3/8" thick each; all together about 5.5" thick
Front leaf-
46" eye to eye
56" along main leaf
23.5 loaded arch
11 leafs
about 3/8" thick each; all together about 5.5" thick
Thanks alot guys and BTW what is the spring rate equation and how does it relate to real world applications?
Rear leaf-
50" eye to eye
67" along main leaf
24" loaded arch
11 leafs
about 3/8" thick each; all together about 5.5" thick
Front leaf-
46" eye to eye
56" along main leaf
23.5 loaded arch
11 leafs
about 3/8" thick each; all together about 5.5" thick
Thanks alot guys and BTW what is the spring rate equation and how does it relate to real world applications?
phillynitro
Registered Member
that is a beast can wait to see it finished
why not remove a few leaves?
chiefheaphy
1/2 ton status
Yeah...maby straight up trade a 4" hanger for a 2.5" and get bigger shackles? I think this may end up a case of run it...
54inches
1/2 ton status
What did the cleaning process entail? Wirewheel or what?
I need to tear into mine tomorrow.
I need to tear into mine tomorrow.
chiefheaphy
1/2 ton status
What did the cleaning process entail? Wirewheel or what?
I need to tear into mine tomorrow.
and a ****load of towels, brake cleaner, gloves...
check out what arrived today! These things are huge.
NEK5
3/4 ton status
Yep, I think those`ll do the job just fine
TruckNutzDude
1/2 ton status
If I were you I'd find out what size o-rings it uses where the heads meet the tube... I HATE having to rebuild the tie-rod style hydraulic rams... After extended use the nuts can back off so the head doesn't fit perfectly on the tubes and eventually cause some issues....
Anyways I'd find out what size that o-ring is and keep a spare w/ ya'...
Anyways I'd find out what size that o-ring is and keep a spare w/ ya'...
OK, somethings not quite right.....
From your numbers below:
5.5" pack thickness / 11 leaves = .500" per leaf (not .375")
(or)
.375" leafs * 11 leaves = 4.125" pack thickness.
It makes a huge difference in the calculation, so I need to know which is true. Also, I need to confirm what the leaf spring width is. Normal Chevy stuff is 2.5", but you might be running something different with the Rocks? 3" perhaps?
In any case, once I get the new clarifications from you I can run all the numbers and post up the values as well as all the calculations for how to do it. I can even run some scenarios about pulling a leaf or two out of the packs....honestly, I don't expect that will help much. You'll see why later.
From your numbers below:
5.5" pack thickness / 11 leaves = .500" per leaf (not .375")
(or)
.375" leafs * 11 leaves = 4.125" pack thickness.
It makes a huge difference in the calculation, so I need to know which is true. Also, I need to confirm what the leaf spring width is. Normal Chevy stuff is 2.5", but you might be running something different with the Rocks? 3" perhaps?
In any case, once I get the new clarifications from you I can run all the numbers and post up the values as well as all the calculations for how to do it. I can even run some scenarios about pulling a leaf or two out of the packs....honestly, I don't expect that will help much. You'll see why later.
OK, somethings not quite right.....
From your numbers below:
5.5" pack thickness / 11 leaves = .500" per leaf (not .375")
(or)
.375" leafs * 11 leaves = 4.125" pack thickness.
It makes a huge difference in the calculation, so I need to know which is true. Also, I need to confirm what the leaf spring width is. Normal Chevy stuff is 2.5", but you might be running something different with the Rocks? 3" perhaps?
In any case, once I get the new clarifications from you I can run all the numbers and post up the values as well as all the calculations for how to do it. I can even run some scenarios about pulling a leaf or two out of the packs....honestly, I don't expect that will help much. You'll see why later.
He should tell you if there is anything between the leaves like friction pads, that would account for the difference in thickness, other wise just take the full section width and divide by number of leaves.
And for any difference in the flex he will have to remove some of the deeper leaves, the first 5 won't do much but lower the ride height they are barely a foot long, more like blocks.
More!
MORE TRUCK PICS PLEASE!!!!
MORE TRUCK PICS PLEASE!!!!
chiefheaphy
1/2 ton status
There must be friction pads cause you can see in between each leaf.
and they are 2.5" wide.
chiefheaphy
1/2 ton status
Heres some pics.
I had to switch the brake assembly to the opposite side.
And since my last post, the brackets/ram mounts I made out of 1" stock still need to drill the holes...maybe I need to get a bench mount drill press?!
I had to switch the brake assembly to the opposite side.
And since my last post, the brackets/ram mounts I made out of 1" stock still need to drill the holes...maybe I need to get a bench mount drill press?!
Are you just torching stuff then grinding it smooth? (like those mounts you have pictured above...)
chiefheaphy
1/2 ton status
yeah, just a torch and grind. I'm excited with how they turned out considering it is the first time I used a torch.
