Proper shackle angle

[tmarx]

There is no single angle that is best for all springs. ..

If the shackle angle is too extreme or it is too short, the spring may hit the frame on compression. If it is too verticle it may reverse. Once you know the shape of your spring, you can calculate the shackle angle and length that will be optimal for articulation.

The idea that 45 degrees provides for significantly better ride quality is a net rumor. .

I agree. I made some mistakes in this regard. I fitted the Hell Creek 4" lift with the Haystee 120mm(pin to pin- IOW 2" over stock) shackles. The ride was harshish, the angles seemingly bad BUT the springs were new(unsettled) and the truck unloaded.

In a moment of hastefull madness I cut those shackles back to stock lenth (75mm pin to pin). It did improve the the angles(more in the front than the rear) and also to a little extent the ride harshness.

Then I really loaded her up and took her on a long overlanding trip in difficult terrain.

This allowed the springs to settle completely. The ride became fantastic and the angles were much "better" BUT the shackles were now too short, as I was banging the springs in the rear against the frame. She was also a bit arse down when loaded .


I then made 110mm( pin to pin) shackles for the rear and 95mm for the front. This made the angle "worse"(less than 45 deg) BUT the ride remained as comfortable as before AND I was no longer banging springs at all

IMHO a 45 deg angle should only be approached when loaded maximum ...

2c

 

[Bushcat]

Hey theo, every where i look i see that sweet 40 of yours.
I am about to order a set from beta so if you wanna get a new set let me know.

 

[FJsnoozer]

tmarx, do you know if these are the revised hell creek springs or the shorter ones from before the length was added?

 

[tmarx]

AFAICR they are the longer(revised) ones. BTW they are still as great notwithstanding the use of the Hilux and Colt OME shocks