Long Travel BS Thread

I second this

 

If you and Harry need a test bed IM me.

 

Hey get in line!!!

 

Problem is, you can stiffen one portion all you want and the next becomes a major stress riser. So unless the entire frame is stiffened front to rear, there isn’t a good way.

 

In 30 miles or so of test drives on the street it’s settled down a bit over an inch on both sides. 5/8” of threads showing above the collar (I refuse to call that the “preload measurement”)
But basically I set that height originally as the “lowest” I can sit with having clearance to the fittings.

in the current starting-to-settle state, I have 3.75” of shock rod available (mathed from eye to eye measurements) and have a decent rake going so probably going to add preload. Is it possible to spin the collars with the shocks still on the truck or do I need to pull them out and compress the spring to spin them?

 

Maybe I'm the only one dumb enough to be doing this on a 3rd gen but the pump made a huge difference in the amount of feedback coming through the wheel for me and I don't have a slide rack as an option so definitely can't misattribute it.

The soft mounted rack is definitely a huge pain in the ass though.

 

did it to my 3rd gen too. After the tundra rack, wheel would rip off my hands. No longer after the pump.

 

Definitely best to compress the spring to adjust. Just make sure you don’t hit spring block height. Double check what that number is so you know!

 

Anyone know a part number for the front diff mount isolators? Apparently one of mine grew legs.



Edit: finally found a diagram. Goodness.

Part #41653-35030

 

3rd gen’s are ass. 2nd gen wouldn’t have popped a tire

 

If you want to daily your vehicle on big tires, this is the answer. I was on 39s with stock pump/rack and that was a task to steer. JD did the pump (also did a slide rack at the same time), moving weight now like 40s is easy, roughly 120lbs of mass tire and wheel per corner. Definitely made driving more enjoyable. If I was 35s or less, not sure I'd swap the pump right away, but it would be on the list.

 

Actually a bit confused on this one as I ran the numbers.
500x18” block height is 8.43”
https://eibach.com/product/1800.300.0500S

At full rebound with the collar basically as high as it can without hitting fittings and I’m measuring from spring end to end of 15.625”.
this is on a 8” travel shock, so subtracting 8 from 15.625” is 7.625”… which is shorter than the block height of 8.43”.
Am I mathing wrong somehow?

I want to add preload to make up a little more ride height but worried I’m hitting coil bind already?

 

If the strap is disconnected, you are not mathing wrong.

500’s seemed really light for your beast of a truck.

What is the length at current ride height?

 

Hard to say if you’re at full extension of the shock or not. Take that 15.625 coil measurement and subtract the amount of shock shaft showing at that time to get your compressed measurement

 

Straps were off, but looks like JD uses a 1” rebound spacer in the Fox shock. extended eye to eye measures 23.5 with 6.75” of rod showing.
so 15.625”-6.75”=8.875”, meaning I can only add .445” of preload before coil bind ignoring the control arm jounce bumper effects.
That doesn’t get me quite to the ride height to match the rear (before I took it apart again with the 5/8” thread showing I was at 38.75” at the bottom of the stock fender flare, looking to get that to 40”)

guess I’ll run the preload to a touch under coil bind and deal with the ride height for now but will call up JD on Monday to see what they think. I did give them corner weights when I ordered.

 

You will have substantial settling occur as well. So keep that all in mind. Figuring out what coil is needed is easy.

Measure coil length at ride height.

Take your ride height length subtract from free length and multiply this number by your spring rate. This is how much pressure is needed to support the truck. It will be far higher than actual corner weight.

You can use the spring pressure number to guide you to a proper spring rate.

 

Are you at 1400 sprung or full corner weight?

Different platform, but I’m 2740 in the front with me in it so figure ~1350 total each. Set with 3/8” room before coil bind at full bump on 18” 500s.

I don’t use the last ~1/2” of shock compression though so if that were used it would bind the coil.

I was also very surprised you don’t see coil bind talked about more with how much preload some people use though. If you are going to switch springs, do the math first on how much ride height you can gain with different springs. Block height on 450, 550, 650 etc seem much better than 400, 500, 600 etc for some reason.

lots of estimates here and I may have overlooked something but it seems like I could get more ride height from a 550 than 600 before worrying about block height

 

Can you ELI5/give an example with numbers and explain how it works?

I’ve never known how to know which springs to use and usually end up guessing.

 

I have a trip coming up so I don’t have time to get new coils in and install them so for now I’m reinstalling with 1” thread showing (3/8” more preload than before)
Which gives me full rebound coil space of 15.25”
Taking out the 6.75” of stroke leaves me 8.5” which is a touch of overhead to 8.43” stack height. Whew. Luckily this coming trip is a soft shakedown so won’t be pushing it hard.