double quarter eliptical

[rocklandxjer]

hey guys,

i was wondering, has anyone experimented with a rear AND front quarter eliptical suspension. is this even possible. it seems as though it is a really capable suspension set up, so why havent many of you done it on both ends??

[rocklandxjer]

i just read the other thread and saw that crash said that you CAN do it, so why havent more done it?

[CRASH]

Packaging and weight. Simpler and easier to just use coil-overs. Much more tunable for spring rate and ride height than adding leaves and changing pre-load on a QE setup.

[rocklandxjer]

good point. thanks, i was wondering that for a while now. i kinda figured it was for better ride, and easier tuning.

thanks, mods can delete the thread if they want

[Matt S.]

good point. thanks, i was wondering that for a while now. i kinda figured it was for better ride, and easier tuning.

thanks, mods can delete the thread if they want


lets leave it.. this is a great thread to find for those searching.

[rocklandxjer]

i actually had a question about the setup of this system.

i was researching and found that many people said that the box that contained the springs was "hinged" does this mean you have the whole set hinged to the "frame" or is that some sort of term... i would imagin a hing would be a terribly weak point in a suspension system, espescially at a point where upward and downward stresses are present...

[CRASH]

i actually had a question about the setup of this system.

i was researching and found that many people said that the box that contained the springs was "hinged" does this mean you have the whole set hinged to the "frame" or is that some sort of term... i would imagin a hing would be a terribly weak point in a suspension system, espescially at a point where upward and downward stresses are present...


Yes, you can build the system such that the spring pack hinges at the frame, and upward travel is checked by a bumpstop of some sort. This allows unrestricted droop ( a very bad idea, in my opinion), and some adjustment of ride height (if you build a good bump).

I'd rather have a captured system with an adjustable bump.

[rocklandxjer]

thank you. it seems like a pretty decent set up. and you seem very educated in it.

sorry to seem annoying, i know i should have just asked in one post, but they keep coming to me.

i also saw a system that was not captured on the axle end (i.e. via shackle) except it was followed by a roller. couldnt this jump offtrack. or is it in a boxed in roller so it may keep straight up and down motion.

i would think that on a sudden drop, the spring could jump off the roller track

[Mike L]

Wouldn't double-quarter eliptical be 1/2 eliptical, which in turn would be a full leaf spring? :gee:

-Mike

[rocklandxjer]

i mean quarter eliptical rear and quarter eliptical front.

i guess the title does sound like that huh.

[BrettM]

I considered quarter eliptical when I linked the rear of my MJ. I had already ruled out coilovers and airshocks because of the cost, which left me basically with regular coils or quarter elliptical. I went with regular coils (aerostar) because they are super cheap for junkyard coils, easy to tune (to a degree) by cutting, and most importantly, easier to fabricate all the mounting.

[rocklandxjer]

yea, ive been looking into ideas for a new suspension system, im getting a new xj and im thinking about turning the one i got into a trail rig. so ive been looking up ideas on suspension systems, and a quarter eliptical all around seemed like a cool idea, unlimited flex heh heh, seemed semi unique.

ill probably fool around with it sometime, but i just wanted to get some info on it, for learning purposes