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opinions please on shckle design
Posted: Sat Apr 24, 2004 11:47 pm
by hypo
just wonderin if this will work coz i need 2 outboard the shackles 4 my GQ axle swap and dont want 2 weld a shackle mount under the frame as it will become a rock anchor.
i think with suffucient bracing it will b fine
CHASSIS
SHACKLE
SPRING
BUSHES
Posted: Sat Apr 24, 2004 11:52 pm
by chimpboy
There is no problem with that layout provided the materials are strong enough.
I would add a crosspiece to the centre of each shackle, that's all.
Jason
Posted: Sat Apr 24, 2004 11:57 pm
by hypo
was planing on bracing them like this
Posted: Sat Apr 24, 2004 11:58 pm
by hypo
shackles will b 8mm thick and yeah something in the middle will help
Posted: Sun Apr 25, 2004 12:21 am
by chimpboy
Just relieving my own boredom here, ignore at will.
I tihnk with those angles you are gonna get a force trying to pull the shackle outward and upward at the bottom which is going to stress the bushes; not a problem but I'd be using hard plastic, not rubber, so that this can't happen.
The reason I suggested a centre brace is that without something between the two sides of the shackle, they are prone to twisting; that is, one side of the shackle swings forward or backward MORE than the other side, allowing the spring to deform and generally phucking things up.
Jason
Posted: Sun Apr 25, 2004 12:22 am
by 4sum4
Yep definatly weeker at the bends x brace it like mentioned B4 and also on the side but not as much as your last pic.
Posted: Sun Apr 25, 2004 12:32 am
by 4sum4
Have you thought about cutting a perch in the diff pumkin?
Posted: Sun Apr 25, 2004 7:33 am
by redzook
http://www.pirate4x4.com/forum/showthread.php?t=244693
this dude is lookin at doin somethin similar
thought it might help
Posted: Sun Apr 25, 2004 9:26 am
by NICK
wont work you need to move the bend down lower.
Posted: Sun Apr 25, 2004 9:32 am
by NICK
i think on conpression they will rub the chassis here, thats why i think you need to move the bend down lower.
standard shackles will rub so i think these will to with the amount of travel that you have.
NICK
Posted: Sun Apr 25, 2004 10:17 am
by customhilux
keep the same idea, use flat bar, inside the shackle makin like a "H" channel
and u can also add some bracing to the sides just to help.
i think u can't get any stronger than that.
i had a sweet pic to but i can't add it for some reason, this keeps comin up
The Extension bmp is not allowed

Posted: Sun Apr 25, 2004 11:33 am
by 1MadEngineer
Ben, just make a new set of pivots and mount them below the chassis and offset to suit them you can use "std" shackles the same way we did on adrians front end, it certainly doesnt limit flex on his. Plus in qld it is legal to weld mounts to the chassis but illegal'ish to run longer shackles

go figure.
Posted: Sun Apr 25, 2004 11:43 am
by beebee
1MadEngineer wrote:Ben, just make a new set of pivots and mount them below the chassis and offset to suit them you can use "std" shackles the same way we did on adrians front end, it certainly doesnt limit flex on his. Plus in qld it is legal to weld mounts to the chassis but illegal'ish to run longer shackles

go figure.
That's tomorrow's job for me. I think hypo wants long shackles though.

Posted: Sun Apr 25, 2004 11:50 am
by chimpboy
1MadEngineer wrote:Ben, just make a new set of pivots and mount them below the chassis and offset to suit them you can use "std" shackles the same way we did on adrians front end, it certainly doesnt limit flex on his. Plus in qld it is legal to weld mounts to the chassis but illegal'ish to run longer shackles

go figure.
... almost.
It's legal to affix mounting blocks to the chassis but it's not legal to modify the chassis, which would probably include welding all over it.
I'm not saying you shouldn't do it though.
Jason
Posted: Sun Apr 25, 2004 12:44 pm
by redzook
beebee wrote:1MadEngineer wrote:Ben, just make a new set of pivots and mount them below the chassis and offset to suit them you can use "std" shackles the same way we did on adrians front end, it certainly doesnt limit flex on his. Plus in qld it is legal to weld mounts to the chassis but illegal'ish to run longer shackles

go figure.
That's tomorrow's job for me. I think hypo wants long shackles though.

i think he wants to run them through the chassis so he dosent get to much lift out of it....
although u could just outboard an move down like 1mad said but run a shorter shackle
Posted: Sun Apr 25, 2004 1:02 pm
by slosh
How much more work would it be to go coil conversion?
After all the brackets are already on the diff, and would save making anti wrap bar.
There's coil hiluxs getting around, so it should be able to get eng certificate?
Posted: Sun Apr 25, 2004 1:15 pm
by customhilux
ok here's my idea,
just use the same flat bar from doin the shackles,
Posted: Sun Apr 25, 2004 8:30 pm
by NICK
what about something like this ben?
Posted: Sun Apr 25, 2004 9:12 pm
by ozy1
slosh wrote:How much more work would it be to go coil conversion?
After all the brackets are already on the diff, and would save making anti wrap bar.
There's coil hiluxs getting around, so it should be able to get eng certificate?
Ben has had the brackets cut off the diffs long ago, so hed have to make up new brackets, plus, his leaf setup works really well when i have seen it in action
Reinforcement bracketing
Posted: Sun Apr 25, 2004 10:41 pm
by totto
I would go for a reinforcement bracket like this. it would reduce torsion stress on the frame and prevent premature bushing wearout in the frame-to-shackle bushing.
Bolt or weld on - a matter of local laws and what's suitable for the builder.
Don't get hung up on design and dimensions - it would have to be customized to the application.
(Idea taken from other "frame-offset-to-spring"-solutions, even factory ones)
Posted: Sun Apr 25, 2004 11:02 pm
by berazafi
some mq patrols use the ofset style go to a wreckers pick one up and copy it with the length and width you need
Posted: Sun Apr 25, 2004 11:40 pm
by hypo
NICK wrote:wont work you need to move the bend down lower.
yes i know this i should have said that the drawing is not 2 scale thanx anyway....
1Mad,
i dont wanna do it that as i am happy with the ways things r with the current shackle length, it flexes mad, rides nice and smooth and gives nice smooth opreation. plus even using a standard shackle under the frame it will hang lower than my longer jobbies..
totto,
the only prob with doing it this way is that i wont b able 2 have a straight side,
nick,
i thought about just spacin it like that but it means custom bolts and stuff and i think the bolts will bend easily
just more work
Posted: Mon Apr 26, 2004 1:04 am
by totto
The bracket could of course be fabricated to fit curved frame rails too, but also it would mean a lot more work. It's a matter of how much work one whould put into it.
Posted: Mon Apr 26, 2004 9:59 pm
by hypo
after much toying and thinking and brain racking i have decided 2 go with my original plan which is the sencond pic nick posted and just get some bolts made and get it under there and driving and if ihave probs ill worry bout it then.
once again thanx every12 4 the input....
Posted: Mon Apr 26, 2004 10:01 pm
by antt
lol, nice filename

Posted: Mon Apr 26, 2004 10:36 pm
by hypo
antt wrote:lol, nice filename

hahah i didnt c wot nick had saved it as until u mentioned it then DOH!!!!!!
Posted: Mon Apr 26, 2004 10:57 pm
by hypo
actually i have made up my mind
ill use the original extened ones i have cut them and flip them so that the anlge isnt as much and run a thinner spacr 2 make up the difference..
its sorted ill get them done 2morra
thanx again people
Posted: Tue Apr 27, 2004 9:07 pm
by hypo
well this is wot it turned out like and i farked up coz i dint take into account that the inside plate is already offset outwards but i think that by the time i remake the inside plate the angle will b 2 sharp and make it fairly weak
sorry 4 the quality its from my cam fone
Posted: Tue Apr 27, 2004 9:46 pm
by antt
booty-licious

Posted: Tue Apr 27, 2004 9:52 pm
by NICK
YEAP, NEEDS A CROSS BRACE FOR SURE
NICK