Top Ramen

[Snowracer]

looks better, still plan on doing a boomerang for the extra clearance?

[Scott Cee AKA 2drx4]

Boomerang still looks like a good idea.

[pointsnorth]

yeah still going with a boomerrang schackle

[pointsnorth]

after doing a bunch of reading on prerunner leaf spring tech i kind of think it would of been better to notch the top of the tube and run a longer shackle for all of the droop

[arse_sidewards]

after doing a bunch of reading on prerunner leaf spring tech i kind of think it would of been better to notch the top of the tube and run a longer shackle for all of the droop

If you want speed from leafs anything less than a tension shackle is turd polishing. You can make C shaped shackles to go around the tube if you want but the longer you make the shackle the more leverage it has over the frame side bushing and with a compressions shackle the spring wants to walk sideways out from under it so you're more or less fucked both ways.

[pointsnorth]

Well it’s not getting a tension shackle so I’m im going to polish this turd as best I can.

That’s also the reason I mounted the springs in a trapezoid. That’s a old drag racer trick to get a leaf sprung car to go straighter down the track


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[arse_sidewards]

Then go for longer shackles. Run harder bushings on that end of the spring if it moves around too much at speed.

[Scoobienorth]

Since we are on leaf spring tech and I know almost nothing about them, I seen some guys running basically a rod end type flex joint in maybe the leaf springs? Anything to that? Does it actually help or is it kinda an issue for durability?

[arse_sidewards]

A rod end joint like that will allow more/easier flex but be bad for handling. If you put brass bushings in the spring eyses and shackles the opposite would happen.

Think about how the bushings resist movement vs the joints and how the leaf spring twists when you stuff one tire and now think about how spring arch effects all this. Leaf springs are hard. There's a million inter-connected variables.

Unless you have an OEM R&D budget I think guess and check is the best approach.

[pointsnorth]

im working of the theory that drawing a straight line thru your front and rear frame mounts. intercect that with a line thru both shackle mounts. that should be as close to 90 degrees as possible for optimum performance. with that factored I require a longer shackle.

[pointsnorth]

most prerunner stuff with a compression shackle toss that out the window and run a super long shackle with it at 120-130 degrees. shackle material is critical at this point and they are stepping up to chromoly tubing im most cases

[pointsnorth]

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[arse_sidewards]

That geometry is fine. Raise the rear (shackle end) more without compromising angle if you want slightly tighter handling. Forward movement of the axle under compression should be negated by the arch of the spring flattening out and pushing rear. You don't want too much rear motion, that causes steering input.

[Scott Cee AKA 2drx4]

most prerunner stuff with a compression shackle toss that out the window and run a super long shackle with it at 120-130 degrees. shackle material is critical at this point and they are stepping up to chromoly tubing im most cases

Got an example pic of this?

[pointsnorth]

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