w250 front leaf springs
06-21-2014, 02:29 PM
#46
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Ok good deal, I was leaning that way anyhow.
And yes, I have seen the groover from the eye hitting the frame. My drivers side is pretty bad.
But soon now more rub and stage coach rides, I hope.
And yes, I have seen the groover from the eye hitting the frame. My drivers side is pretty bad.
But soon now more rub and stage coach rides, I hope.
06-21-2014, 03:00 PM
#47
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This seems to be an issue with just about every lift spring out there. With a positive arch the spring needs to be shorter to be used with anything close to stock shackle length. The reason being that the positive arch lift spring will grow In length under compression. With the spring eye right up against the frame there is no room for the shackle to swing back to allow spring compression and you get spring bind. Stock springs are flat at best and under compression go into a negative arch and the shackle swings forward as the spring length shortens. Biltit, it appears that your spring eyes are up against the frame and I believe you are experiencing spring bind. I bet you have witness marks on the frame from the eye hitting it. I would recommend a longer set of shackles to allow the springs to compress as necessary for good articulation and the ride quality should be greatly enhanced. Gasgano, same story, put a long enough shackle on that allows articulation without bind.
I have given this quite a bit of thought over the last couple months. This is exactly my conclusion. I am considering a Chevy 52" 1/2 ton rear spring swap on mine. That is after I get the rest sorted out.
06-21-2014, 04:04 PM
#48
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Ok, now another question...
Which shackles do I use, Jungles or CustomSuspension?
Both seem well built, but the shackles that came with the parabolic springs are an inch or so longer than the jungle shackles. Do I use the ones that came with the springs?
Right now my frame is on blocks, the axle is being held up by the springs themselves. Super stiff, they didn't budge, but there is still such a small gap between the frame and the leaf(using jungles shackles) that I wonder if I should swap 'em out.
I'll be picking up shocks today. Think I may just put shocks on and see how it sits and rides first.
Anyone else have this issue?
Which shackles do I use, Jungles or CustomSuspension?
Both seem well built, but the shackles that came with the parabolic springs are an inch or so longer than the jungle shackles. Do I use the ones that came with the springs?
Right now my frame is on blocks, the axle is being held up by the springs themselves. Super stiff, they didn't budge, but there is still such a small gap between the frame and the leaf(using jungles shackles) that I wonder if I should swap 'em out.
I'll be picking up shocks today. Think I may just put shocks on and see how it sits and rides first.
Anyone else have this issue?
06-21-2014, 08:17 PM
#49
Registered User
This seems to be an issue with just about every lift spring out there. With a positive arch the spring needs to be shorter to be used with anything close to stock shackle length. The reason being that the positive arch lift spring will grow In length under compression. With the spring eye right up against the frame there is no room for the shackle to swing back to allow spring compression and you get spring bind. Stock springs are flat at best and under compression go into a negative arch and the shackle swings forward as the spring length shortens. Biltit, it appears that your spring eyes are up against the frame and I believe you are experiencing spring bind. I bet you have witness marks on the frame from the eye hitting it. I would recommend a longer set of shackles to allow the springs to compress as necessary for good articulation and the ride quality should be greatly enhanced. Gasgano, same story, put a long enough shackle on that allows articulation without bind.
longer shackles fixed it (but my homebrew deals are nowhere near as nice as Jungles...functional though)
06-22-2014, 09:32 AM
#50
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This makes me wonder if I should drill the holes for my shackle pivots farther back on the frame a bit form the stock location. I will take a closer look at that when I get that far. I know there isn't much room though.
06-22-2014, 09:37 AM
#51
Registered User
I have a set of the parabolics on my crewcab. The company that makes them is local to me. So I have had a chance to talk to them in person about these springs. They include the new shackles because the added travel of the spring requires a longer shackle to negate the chance of the eye's binding on the frame.
06-22-2014, 09:48 AM
#52
[QUOTE=mknittle;3241046]This makes me wonder if I should drill the holes for my shackle pivots farther back on the frame a bit form the stock location. I will take a closer look at that when I get that far. I know there isn't much room though.[/QUOTE.
It would be easier to move the spring hangers forward.
It would be easier to move the spring hangers forward.
06-22-2014, 10:08 AM
#53
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[QUOTE=comotionman;3241048]
I am in the middle of a 4X4 conversion so that helps. I have already made front spring hangers with two mounting positions. one stock and another 2" forward for longer springs. When I get to the rear, since there are no holes yet it will be easy to move back from the stock position as long as there is room.
https://www.dieseltruckresource.com/...t314771p6.html
post#77 are the parts I am using.
This makes me wonder if I should drill the holes for my shackle pivots farther back on the frame a bit form the stock location. I will take a closer look at that when I get that far. I know there isn't much room though.[/QUOTE.
It would be easier to move the spring hangers forward.
It would be easier to move the spring hangers forward.
https://www.dieseltruckresource.com/...t314771p6.html
post#77 are the parts I am using.
06-22-2014, 07:48 PM
#54
Registered User
[QUOTE=mknittle;3241052]
When I saw your front spring hangers with the two holes, I smiled and thought that would solve some of the issues being discussed here.
I had to install some custom made 1/2 inch longer rear of the front spring shackles to get the 8 year old, 6 inch Skyjacker springs from hitting the frame on compression.
I am in the middle of a 4X4 conversion so that helps. I have already made front spring hangers with two mounting positions. one stock and another 2" forward for longer springs. When I get to the rear, since there are no holes yet it will be easy to move back from the stock position as long as there is room.
https://www.dieseltruckresource.com/...t314771p6.html
post#77 are the parts I am using.
https://www.dieseltruckresource.com/...t314771p6.html
post#77 are the parts I am using.
I had to install some custom made 1/2 inch longer rear of the front spring shackles to get the 8 year old, 6 inch Skyjacker springs from hitting the frame on compression.
06-22-2014, 08:04 PM
#55
Registered User
[QUOTE=oliver foster;3241112]
When I saw your front spring hangers with the two holes, I smiled and thought that would solve some of the issues being discussed here.
I had to install some custom made 1/2 inch longer rear of the front spring shackles to get the 8 year old, 6 inch Skyjacker springs from hitting the frame on compression.
I made one set with one hole. but after some thought I figured I would be better off changing my design and doing it once. The problem with me is by tine I get around to doing what I was going to do I change my mind and redesign the whole thing
When I saw your front spring hangers with the two holes, I smiled and thought that would solve some of the issues being discussed here.
I had to install some custom made 1/2 inch longer rear of the front spring shackles to get the 8 year old, 6 inch Skyjacker springs from hitting the frame on compression.
I made one set with one hole. but after some thought I figured I would be better off changing my design and doing it once. The problem with me is by tine I get around to doing what I was going to do I change my mind and redesign the whole thing
06-22-2014, 09:13 PM
#56
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FWIW, when I had my front springs re-done, re arched and new heavier main spring, even with the old springs in front of them, they miscalculated the length of the springs, and they were hitting the frame like above. THey simply took the springs back, reworked they eye where it should have been, and gave them back.
This overextension of the spring is simply due to lack of planning on the part of the shop. Since I brought them the springs, they couldn't measure the truck itself, as it was 40 minutes from them. THey had to "wing" the length based upon the original springs. Once the weight of the front of the truck is placed on the springs, and they settle down, it was the first step to realizing something was wrong. The truck really has to be there to make the springs right the first time, simply to get the most accurate measurements.
This overextension of the spring is simply due to lack of planning on the part of the shop. Since I brought them the springs, they couldn't measure the truck itself, as it was 40 minutes from them. THey had to "wing" the length based upon the original springs. Once the weight of the front of the truck is placed on the springs, and they settle down, it was the first step to realizing something was wrong. The truck really has to be there to make the springs right the first time, simply to get the most accurate measurements.
06-06-2018, 08:18 AM
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06-06-2018, 08:25 AM
#58
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06-06-2018, 08:39 AM
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06-06-2018, 08:48 AM
#60
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I registered over at RCC almost 10 years ago.
I can't remember what I had to do to sign up.
He comes over here to visit a bit as well, so I am sure you could reach out to him here at DTR as well.
I can't remember what I had to do to sign up.
He comes over here to visit a bit as well, so I am sure you could reach out to him here at DTR as well.