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64" rear swap

Nice 64" swap write-up:waytogo:

But when it comes to physics, I advice you to redo your home-work ;)
If you were able to set up this test:
A long strip of spring steel.
Cut a 64" strip and a 52" strip from the SAME material
apply a given torque to each
The 64" strip will deform less.
This is not true.

And if you're still too stubborn to listen to me, watch the darn video I posted. It's like the first statement he makes. If you don't believe a major diesel truck manufacturer, well then explaining this is a lost cause.
You say that Wikipedia is a poor reference, but you completely trust the sales-pitch from a Ford employee in a commercial-video on youtube:rolleyes:

I'm not saying he's lying, but I think he simplified it some...
I think he means that they can make it more resistant to wrap indirectly because of the length, but not due to the length itself.

A longer spring IS softer
But because it is softer, you CAN add more leaves and make it wider/thicker without making it superstiff.
And it's the stiffness close to the axle that counts when we want to avoid wrap.
Since the rotating force from the axle (torque) gets less and less the longer from the centerpin.

Another thing I'd like to point out when it comes to eliminating axle-wrap is the stock staggered shock mounts.
Many people tend to rearrange their shocks inwards,
but I think that can increase the risk for axle-wrap.
In my experience you don't need superlong shocks in the rear, you can get a decent flex with 11-12" shocks, and thats possible with stock shock-mounts.

I hope this made at least some sense, English isn't my native language :o
 
Fred, this is the best reply anyone has posted in this thread so far. I think you've put this debate to rest. Leave it to a Scandinavian's ingenuity to explain a hard concept. I'm sure there will be dissenters however.
 
Nice 64" swap write-up:waytogo:

But when it comes to physics, I advice you to redo your home-work ;)

This is not true.


You say that Wikipedia is a poor reference, but you completely trust the sales-pitch from a Ford employee in a commercial-video on youtube:rolleyes:

I'm not saying he's lying, but I think he simplified it some...
I think he means that they can make it more resistant to wrap indirectly because of the length, but not due to the length itself.

A longer spring IS softer
But because it is softer, you CAN add more leaves and make it wider/thicker without making it superstiff.
And it's the stiffness close to the axle that counts when we want to avoid wrap.
Since the rotating force from the axle (torque) gets less and less the longer from the centerpin.

Another thing I'd like to point out when it comes to eliminating axle-wrap is the stock staggered shock mounts.
Many people tend to rearrange their shocks inwards,
but I think that can increase the risk for axle-wrap.
In my experience you don't need superlong shocks in the rear, you can get a decent flex with 11-12" shocks, and thats possible with stock shock-mounts.

I hope this made at least some sense, English isn't my native language :o
Well said!
 
I love it when a completely good post turns into a vagina measuring contest. Keep it up boys , its great entertainment:haha:


Um, who's comparing vagina's?? there is a deep technical discussion going on . which is what this forum is for. Its a good tech right up with clear pictures but there's a difference in opinion about spring wrap VS spring length.

So please keep your stupid comments to yourself if you have nothing constructive to add to this thread. We have the lounge for those kind of post's I'm sure you'll find good company there
 
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