Larger Shackles ? Help Needed For Lift

[Smurf]

I'd look at a set of longer shackles, probably 50-80mm longer than what you have now. Which will give you 25-40mm of lift. I would also get your springs re-arched to add more height there also.
You will also need to extend your bump stops to prevent the diff hitting the motor.
If you don't want to increase your sprung height that much then raising your engine mounts may be the way to go.

[yorick]

Check the angle of shackles when it's at rest. The shackle should be at a right angle or slightly under with no load. if the angle between shackle and spring is less than 45 degrees then the springs need resetting to adjust for the extra load of the bigger motor.

Sorry yorick, but id have to disagree with you there, if you want a nice ride, then you want the shackle angles around 45deg. Load carrying is good at 90deg, but uncomfortable.

But if the jeeps are set up for a 90 deg angle, then ignore me

Hell don't apologise for having a different viewpoint, be a bloody boring world if we all agreed , however you're quite right about the ride although I'd say 30 degrees at rest for best balance between ride and travel, but we're after height here and zero to ten degrees will give max height even it does jar yer balls into yer kidneys

[SupraLux]

Check the angle of shackles when it's at rest. The shackle should be at a right angle or slightly under with no load. if the angle between shackle and spring is less than 45 degrees then the springs need resetting to adjust for the extra load of the bigger motor.

Sorry yorick, but id have to disagree with you there, if you want a nice ride, then you want the shackle angles around 45deg. Load carrying is good at 90deg, but uncomfortable.

But if the jeeps are set up for a 90 deg angle, then ignore me

Hell don't apologise for having a different viewpoint, be a bloody boring world if we all agreed , however you're quite right about the ride although I'd say 30 degrees at rest for best balance between ride and travel, but we're after height here and zero to ten degrees will give max height even it does jar yer balls into yer kidneys

I'll disagree with the both of ya then

The angle of the shackles is irrelevant, and depends on how heavy the springs pack is in relation to the truck weight, shock valving will affect it too, load on the truck at the time, and probably how you're holding your tongue...

Its part of an overall package and factory it generally works nicely - not many of us still have factory-spec trucks tho so the angles tend to be all over the place.

Back to the main question tho - I wouldn't lift it the way you're talking about - if the weight of the engine is too much for your current springs you will just end up hyper-extending the spring pack, which will probably cause the pack to fail - ie *SNAP*... what I mean by that is you are talking about pushing the end of the pack further away from the chassis, meaning that for the bump-stop to be reached the pack will have to now bend backwards to get to it - which they don't like doing, especially if its old steel. Get some helper-leafs in the pack... beef it up a bit for the new weight... thats my advice.

I manufacture extended greasable shackles for various trucks by the way... they are generally 50mm over stock, so give approx a 25mm lift... I wouldn't recommend going much more than that as you start to bugger up the geometry of the steering in the front or the anti-squat in the back.


Steve

[yorick]

Check the angle of shackles when it's at rest. The shackle should be at a right angle or slightly under with no load. if the angle between shackle and spring is less than 45 degrees then the springs need resetting to adjust for the extra load of the bigger motor.

Sorry yorick, but id have to disagree with you there, if you want a nice ride, then you want the shackle angles around 45deg. Load carrying is good at 90deg, but uncomfortable.

But if the jeeps are set up for a 90 deg angle, then ignore me

Hell don't apologise for having a different viewpoint, be a bloody boring world if we all agreed , however you're quite right about the ride although I'd say 30 degrees at rest for best balance between ride and travel, but we're after height here and zero to ten degrees will give max height even it does jar yer balls into yer kidneys

I'll disagree with the both of ya then

The angle of the shackles is irrelevant, and depends on how heavy the springs pack is in relation to the truck weight, shock valving will affect it too, load on the truck at the time, and probably how you're holding your tongue...

Its part of an overall package and factory it generally works nicely - not many of us still have factory-spec trucks tho so the angles tend to be all over the place.

Back to the main question tho - I wouldn't lift it the way you're talking about - if the weight of the engine is too much for your current springs you will just end up hyper-extending the spring pack, which will probably cause the pack to fail - ie *SNAP*... what I mean by that is you are talking about pushing the end of the pack further away from the chassis, meaning that for the bump-stop to be reached the pack will have to now bend backwards to get to it - which they don't like doing, especially if its old steel. Get some helper-leafs in the pack... beef it up a bit for the new weight... thats my advice.

I manufacture extended greasable shackles for various trucks by the way... they are generally 50mm over stock, so give approx a 25mm lift... I wouldn't recommend going much more than that as you start to bugger up the geometry of the steering in the front or the anti-squat in the back.


Steve

Yer honour, I disagree that he was disagreein'! In fact I agree with much of what you say, however I was just trying to ascertain how good the springs were. Often a simple indicator is the angle of the shackles because as a pack flattens the shackles lean closer to horizontal. 'Course, having it sitting on the bumpstops at rest is another. Not a lot of point putting helper leaves in a stuffed spring pack. Get them reset, then see how the weight difference makes them look. Then, if need be, stick in the long shackles and or extra leaves.

[MAHINDRACJ4A]

got some made




3inch Shackle Lift Now just to get some 33" tyres