Custom 4" lift possible?

[cmdr jim]

No, you would need new spindles as well to maintain the uca/lca kinematic relationship and essentially have all of the parts as the 4" superlift, just with less height.

It'd be cheaper and better to just get the superlift.

With what I'm proposing, I would be maintaining the kinematic relationship of the upper and lower control arm and no spindles would be required. Just taking care of the added distance in a different location, no in a new spindle. As long as the vectors are working in the same angular relationship, the distance between the control arms doesn't matter.

[Matt]

How are you lowering the LCA and maintaining the angular relationship without utilizing a longer spindle? You can't increase the distance between the control arm mounts without also increasing the distance between the balljoints by the same exact amount without messing up the relationship. It's not a "one or the other" type of thing, both are required.

[Sal-XK]

Even if you could double stack the suspension would be horrible I would think with almost no down travel.

[valpacer]

If you were to do that and keep the factory knuckle, you would need to angle the bj mounts or they would run out of travel very quickly and bind, and the resultant travel would be a short arc instead of a relatively straight travel with the factory or superlift setup. Your upper and lower control arms need to be in a same plane relationship (yes I'm generalizing but for this case it will do!)

Your bump steer would be horrendous too.



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[valpacer]

Sorry, phone hadn't updated, what Matt and Sal said!! :-D

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[cmdr jim]

I have the pivot points all worked out as to keeping it all as stock, think of it as moving everything down 1-1/2". So when done the CV joints and tie rods see a 2-1/2" lift, Is 2-1/2" of lift too much?

[Matt]

Jim, you definitely don't have it figured out unless I'm reading it wrong? Forget about tie rods & CV axles.... first step is UCA/LCA/Spindle. You said you're lowering the LCA pivot point and using the stock spindle. The are you moving the UCA down too? That's the only alternate method to maintaining the kinematic relationship of the system.... if you lower the pivot point of the LCA you must either utilize a longer spindle OR lower the UCA equivalently.

If you don't use one of those methods the car will not drive. Try drawing it out to scale best you can and calculate the equation for the spindle angle in relation to the vertical axis (aka camber). The change in camber as the suspension cycles is a key design factor which aids in driveability, handling and performance. Its allowable delta is also bounded by the steering restrictions since camber changes correlate directly to toe angle changes. If that relationship is also not maintained you'll (at a minimum) have a bad case of bump steer which can not be corrected by other means.

[07JeepXK]

I Want to have the SL on mine before Adam does!

Haha unless your getting one in the next couple months then I don't see that happening!

[Matt]

Ya never know.....

[06JeepXKHEMI]

I want to know what some WKs are saying when in their mod list they say "Modified OME"? Is that with the 1/4" spacer up front or is there other components they add