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-   -   long arm suspension vs normal suspension lift (http://www.wranglerforum.com/f282/long-arm-suspension-vs-normal-suspension-lift-40402.html)

tbk125 11-26-2009 03:25 PM

long arm suspension vs normal suspension lift
 
what the difference between the two advantages and disadvantages. also can you convert a normal suspension lift to a long arm suspension lift?

AzTJ 11-26-2009 04:09 PM

As you lift the Jeep, the control arms start to get a steeper angle. Switching to long arms reduces the angle on the arms to better the ride quality and suspension cycling.

stevens243 11-26-2009 04:12 PM

Long are advantages:

- more flex
- much better geometry (on TJ's anyway)

Long are disadvantages:

- more expensive
- not generally as street worthy
- give you a higher center of gravity
- usually requires a SYE

Short arm advantages:

- cheaper lift
- better street manners
- usually easier to install and maintain

Short arm disadvantages:

- less flex
- usually can't get high enough for 35" + tires w/o body lifts and/or cutting to clear tires.

Converting a "normal" suspension to a long arm is typical. Essentially, you do a lift for bigger tires and what type of wheeling you want to do.

Doing the lift twice is not good on the wallet, so get what you need to wheel where you want. Avoid a 4" short arm if you need the 6" and want bigger tires to rock crawl.

Get the 4" short arm if that fulfills what you want to do with the jeep.

30-284 11-26-2009 04:42 PM

Quote:

Originally Posted by stevens243 (Post 495282)
Long are advantages:

- more flex
- much better geometry (on TJ's anyway)

Long are disadvantages:

- more expensive
- not generally as street worthy
- give you a higher center of gravity
- usually requires a SYE

Short arm advantages:

- cheaper lift
- better street manners
- usually easier to install and maintain

Short arm disadvantages:

- less flex
- usually can't get high enough for 35" + tires w/o body lifts and/or cutting to clear tires.

Converting a "normal" suspension to a long arm is typical. Essentially, you do a lift for bigger tires and what type of wheeling you want to do.

Doing the lift twice is not good on the wallet, so get what you need to wheel where you want. Avoid a 4" short arm if you need the 6" and want bigger tires to rock crawl.

Get the 4" short arm if that fulfills what you want to do with the jeep.



Mine rode much better after the conversion to long arms than when stock on the road and naturally off road as well.

AzTJ 11-26-2009 04:53 PM

Quote:

Originally Posted by stevens243 (Post 495282)
Long are disadvantages:

- more expensive
- not generally as street worthy
- give you a higher center of gravity
- usually requires a SYE

No of these are generally true. The street manners are usually improved due to the arms being at a lesser angle and being more parallel to the ground. The higher center of gravity is only determined by the height of the lift. There are a number of LCG(low center of gravity) kits out there that run long arms on 4" or less of lift. And the need for an SYE is again, only determined by the height of the lift.

stevens243 11-26-2009 05:29 PM

x2. My 6" long arm is really good on the street. But, I have a Rubi with the stock SYE setup and a Fabtech lift.

Generally, the rule I mentioned stands. Of course, I'm comparing that to a 3-4" short arm lift vs. a long arm...

Jerry Bransford 11-27-2009 10:11 AM

2 Attachment(s)
With everythiing else being equal, a long-arm rides better on the street when compared to a short-arm at steeper angles. COG wise, they give the same COG as a short-arm does when everything else is the same, no difference. And a long-arm doesn't require a SYE any more than a short-arm lift does either, everything else including the lift height being equal.

For most wheeling, my long arm suspension from RE performs exceptionally well. Its only real issue is that the added control arm length & exposure means the control arms can get hung up on some trails more easily. If I'm on an extremely difficult rock crawling trail like out in Johnson Valley, my long arms give me fits as I get hung up more than I like... much to the enjoyment of my buddies who aren't all that impressed with long arm suspensions. :p

The two below pics show two of the several locations my long arms got hung up on that day on Sunbonnet in Johnson Valley. That second pic/poster was done by a buddy who loves to give me crap over my long arms. :D

4Jeepn 11-27-2009 10:19 AM

One other important thing.. with long arms you will need to cut off the some of the stock arm brackets, and in some cases you need to weld certian parts of the kit.


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