XR observations

[At Risk Ute]

Finished swapping takeoff 392 XR shocks onto my Yellow 2.0T XR. Wanted something stiffer for the pavement after running Falcon 3.3s on my two door and OEM on my Purple 392 XR.

For rake comparison (both came stock with the steel bumper)…

Yellow XR has sliders, winch, winch plate, front bumper hoop, and 3/4” front spacers. Rake is a little less than an inch.

Purple 392 XR is stock. Rake is the same... little less than an inch, but sits about one inch taller.

My two cents on the XR package... worth it for the gears and being able to run some pretty difficult trails straight out of the box. However, a little disappointed we didn’t get the longer LCAs.

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[libis22]

Finished swapping takeoff 392 XR shocks onto my Yellow 2.0T XR. Wanted something stiffer for the pavement after running Falcon 3.3s on my two door and OEM on my Purple 392 XR.

For rake comparison (both came stock with the steel bumper)…

Yellow XR has sliders, winch, winch plate, front bumper hoop, and 3/4” front spacers. Rake is a little less than an inch.

Purple 392 XR is stock. Rake is the same... little less than an inch, but sits about one inch taller.

My two cents on the XR package... worth it for the gears and being able to run some pretty difficult trails straight out of the box. However, a little disappointed we didn’t get the longer LCAs.

Looking good! I am also contemplating if I should do this.

Can you please let us know your driving impressions? Does it feel more planted in the corners? what about the nose dive feeling while braking? Did you change LCAs on this to Mopar lift ones or the trackbars?

Thanks!

 

[stumblinhorse]

Finished swapping takeoff 392 XR shocks onto my Yellow 2.0T XR. Wanted something stiffer for the pavement after running Falcon 3.3s on my two door and OEM on my Purple 392 XR.

For rake comparison (both came stock with the steel bumper)…

Yellow XR has sliders, winch, winch plate, front bumper hoop, and 3/4” front spacers. Rake is a little less than an inch.

Purple 392 XR is stock. Rake is the same... little less than an inch, but sits about one inch taller.

My two cents on the XR package... worth it for the gears and being able to run some pretty difficult trails straight out of the box. However, a little disappointed we didn’t get the longer LCAs.

Why does the 392 XR sit an inch taller than the 2.0T XR? I thought the 392, 392XR and any engine level XR had the same factory lift?

 

[Zandcwhite]

Why does the 392 XR sit an inch taller than the 2.0T XR? I thought the 392, 392XR and any engine level XR had the same factory lift?

No 2 Wranglers are exactly identical from the factory. The 2.0t in these pics has a winch and winch plate, the 392 doesn't. The 392 will have higher rate springs thanks to the heavier engine so would likely sag less even if it got a winch. The lighter the spring rate the more it will sag under added weight. Put the same load in a 2.0t vs a 392 and it will sag more. It's like aftermarket lift heights, it's not an exact science.

 

[Plumbean]

Depends on how much the winch weighs. You can simulate it by finding something of a similar weight, like a 5 gallon bucket full of sand or rocks and setting it on the bumper.

Also depends on which springs. Different springs seem to have shipped with various XRs.

 

[Jtphoto]

Why does the 392 XR sit an inch taller than the 2.0T XR? I thought the 392, 392XR and any engine level XR had the same factory lift?

The diesel and 392 weigh somewhere in the neighborhood of 400-500lbs more than the other engine options so they have much stiffer springs. Same thing happens when you put loaded 4dr springs on 2dr. You only get lift because of a much stiffer spring. But the ride will suffer.
I actually had this discussion with Mike at RK. I have a heavy winch/bumper combo 215lbs that dropped my RK springs more then I like. My idea was to use RK diesel springs which have a higher spring rate. He suggested it would then sit too high and ride rough.

 

[stumblinhorse]

No 2 Wranglers are exactly identical from the factory. The 2.0t in these pics has a winch and winch plate, the 392 doesn't. The 392 will have higher rate springs thanks to the heavier engine so would likely sag less even if it got a winch. The lighter the spring rate the more it will sag under added weight. Put the same load in a 2.0t vs a 392 and it will sag more. It's like aftermarket lift heights, it's not an exact science.

An inch is a lot, and he did not just say rake from the extra weight on the front. If you were to put a scale on the back tire of both those Jeeps they would be very close to the same weight. I understand more than most of the factory springs and heights. But I would be extra pissed if I paid 4K for the XR and didn’t get really any lift over a rubicon 2.0T.

 

[stumblinhorse]

The diesel and 392 weigh somewhere in the neighborhood of 400-500lbs more than the other engine options so they have much stiffer springs. Same thing happens when you put loaded 4dr springs on 2dr. You only get lift because of a much stiffer spring. But the ride will suffer.
I actually had this discussion with Mike at RK. I have a heavy winch/bumper combo 215lbs that dropped my RK springs more then I like. My idea was to use RK diesel springs which have a higher spring rate. He suggested it would then sit too high and ride rough.

Trust me I get it for the weight. But not to that extreme.

 

[Sobchak Security]

Is there any way to estimate how much sag you'll get when adding a bumper and winch? I have 189 and 190 springs on my XR, but aside from having my wife stand on my bumper I have no idea how to estimate sag.

 

[Zandcwhite]

An inch is a lot, and he did not just say rake from the extra weight on the front. If you were to put a scale on the back tire of both those Jeeps they would be very close to the same weight. I understand more than most of the factory springs and heights. But I would be extra pissed if I paid 4K for the XR and didn’t get really any lift over a rubicon 2.0T.

If I recall correctly, factory spring rates are ~120lbs/in. A winch and winch plate are likely right about that weight. It's not hard to add an extra 100lbs in the back of a Jeep either. My compressor/tools/recovery gear that are always in the back of our jeep are pushing 200lbs. Hell a full tank of gas is pushing 170lbs. If you think the jeep sitting an inch lower takes an extreme amount of weight, I'd suggest grabbing a tape measure and a 100lb dumbell. Stock springs are SOFT.

 

[Zandcwhite]

Is there any way to estimate how much sag you'll get when adding a bumper and winch? I have 189 and 190 springs on my XR, but aside from having my wife stand on my bumper I have no idea how to estimate sag.

All things being equal, 120lbs added to the front bumper should drop the front by 1/2". If you know the weight of the winch and winch plate you will be adding, the front springs should be in the 120lbs/in range. Evenly distributed across the front would put half that weight on each front spring.

 

[Sobchak Security]

All things being equal, 120lbs added to the front bumper should drop the front by 1/2". If you know the weight of the winch and winch plate you will be adding, the front springs should be in the 120lbs/in range. Evenly distributed across the front would put half that weight on each front spring.

That's exactly what I needed to know. Thanks.

 

[AnnDee4444]

I think it's worth mentioning that all sprung weight can be treated the same. Added winch and accessory weight is no different than a heavier motor. edit: obviously weight placement is another subject.

The XR has more unsprung weight (wheels/tires/axles) than a typical JL, but the sprung weight is almost the same as a similarly equipped non-XR (the spare tire is heavier).

The numbers below are kind of old , so they might not be applicable to the XR/3.0/392. Also the 2-door has a higher front spring rate than a 4-door (probably due to the shorter wheelbase).

 

[Jtphoto]

Trust me I get it for the weight. But not to that extreme.

If a 2dr can get 2” lift off a set of loaded 4door springs I don’t see why not.
NOW, that being said my XR 3.6L E Torque was loaded except for the steel bumper group and my first winch bumper combo put it almost down on the bumpstops. I had it up on 2.5” lift springs quite quickly after that to get it up a bit.

 

[stumblinhorse]

If a 2dr can get 2” lift off a set of loaded 4door springs I don’t see why not.
NOW, that being said my XR 3.6L E Torque was loaded except for the steel bumper group and my first winch bumper combo put it almost down on the bumpstops. I had it up on 2.5” lift springs quite quickly after that to get it up a bit.

Those are similarly equipped jlurxr in a 2.0t and a 392. Again the rear weight would be very similar. if @At Risk Ute came in and said that he had a full overland set up in his 2.0t and an 1/8 of a tank of gas in the 392 sure an inch isn’t bad. But I don’t think that is the case.

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