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Old 01-13-2014, 12:26 PM   #1
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Dilemma

I need to take a 1200 mile trip. All but 1/4 mile of it will be on pavement. Most of the trip will be at 75-90 mph. How does the JKUR's handle at 90 mph? The highest speed I have gone in ours is 70 mph. I also have a 2012 PSD Ford Diesel that is very stable at 90 mph. Our Corvette is out of the equation due to not being able to go the last 1/4 mile on rough dirt road.

So 2012 psd or 2014 JKUR? If the JKUR is stable at that speed, I would take it.

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Old 01-13-2014, 12:44 PM   #2
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Stock or with mods? I have a 2013 JKU (17 inch wheels) with no suspension mods and mine is fine at that speed on the highway. I usually dive a little slower but you should be fine.

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Old 01-13-2014, 12:50 PM   #3
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Eh, just got back from a trip to Dallas from California. About half the trip traffic was flowing 90-95 mph, and so was I. Felt the same as going 70ish. If there were really gusty areas I did slow down, however. Edit: 2013 JKU Sport S 17" wheels stock
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Old 01-13-2014, 12:52 PM   #4
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Drove my stock '08 JKU from NY to FL averaging 80-85 MPH. Handled just fine. Just wouldn't recommend taking turns at that speed
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Old 01-13-2014, 01:02 PM   #5
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The JKU is much more stable at highway speed than previous generations of Jeeps. It will handle that speed range just fine. My biggest concern would be the tire speed rating. The stock Rubi KM tires are only rated (P/Q) for 95-100 MPH. Rolling them for sustained periods at 90 MPH is approaching that limit. It is winter so cooler temps will help.

A few caveats:

1. The JK has a significant longitudinal x-section so cross winds will be very noticeable at 90MPH
2. Lift and large tires will impact your high speed handling
3. Your fuel economy is going to be very poor at 90 MPH

If you decide to take your JK please share your driving experience after your trip.

This sounds like the Canon Ball Run.
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Old 01-13-2014, 01:36 PM   #6
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all but 1/4 mile paved? I would take the corvette and walk the last 1/4 mile.
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Old 01-13-2014, 01:57 PM   #7
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Thanks for the responses. I will give the JKUR a try. I will post if the trip goes smoothly or if I have handling problems.
Our JKUR is bone stock. It has BF Goodrich Mud-Terrain TA 17 inch tires from the factory. No cannon ball run, I have a family member with major illness. Traffic along my route drives 75-90 mph. Go slower and you get run over. Locally, 90 mph is not a good idea due to speed limit and traffic, so testing it here is not a good idea. I could run it up to 90 mph, but it would be only for a short time and distance.
Good idea about the speed rating of the tires, I will have to check them.

To bad I can not use the Vette, it idles at 90 mph in sixth gear, and top speed is 200 mph with the stock ZR tires and supercharger. With one and a half inch ground clearance, it is not possible to go on the dirt/ruts road.
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Old 01-13-2014, 01:58 PM   #8
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all but 1/4 mile paved? I would take the corvette and walk the last 1/4 mile.
No place to park it. It is out in the middle of the desert.
And if I did park it on the side of the road, in southern California, it would be stolen in about two seconds.
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Old 01-13-2014, 03:37 PM   #9
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You'll be fine. Check your tire pressure and make sure your spare is good.

Driven mine 2 hours straight at 90 MPH.

Downside is she sucked 14 gallons of gas down like it was cold beer at the Baja 1000.

Bring spare gas cans, you'll burn through it like mad with those 4.10 gears at 90 mph.
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Old 01-13-2014, 03:55 PM   #10
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i have a 2014 jkur with 4.10's and 33's and I would be comfortable running it at 80-85mph all day long, but would be more comfortable at 75-80mph tho.
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Old 01-13-2014, 06:09 PM   #11
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Our JKUR came with 3.73 gears. Since I do not want to lift it or add larger tires, the 3.73 gears is what I wanted. We purchased our Jeep so we could go exploring out in the desert. No rock crawling for us. I will have to test it, to see what rpm's it will be for 75/80/85 and 90 mph. Since it is as aerodynamic as a rock, I am sure the fuel mileage will be horrible. But driving 1200 miles at 65 mph would be excruciating.
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Old 01-13-2014, 07:39 PM   #12
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I did a 2700 mile trip back in December, drove the speed limit which was 75 or 70 for the most part, except when road conditions mandated a lower speed which they did for about 1/3 of the trip. Gas mileage goes to hell above 70. I cannot imagine driving my JKUR over 80 for sustained periods, however. Why would you need or want to go 90 in a Jeep? I hope you have a good radar-detector and lots of extra $100 bills!
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Old 01-13-2014, 07:47 PM   #13
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maybe I missed something. why 90 mph? it's a jeep not a race car.
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Old 01-13-2014, 10:24 PM   #14
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maybe I missed something. why 90 mph? it's a jeep not a race car.

20% of the vehicles are doing 90 mph.
70% are doing 80-85 mph
10% are doing the speed limit of 70 mph.

We are only talking about 90 mph. Our street car does 200 mph.
90 mph is just staying up with 20% of the traffic.
Our race car averaged 161 mph in the Silverstate Challenge race for 90 miles.
90 mph is not that fast.
At 70 mph, you will have some trucks pass you. Or to put it another way, you are a road hazard.
If 90 mph is not safe in our JKUR, then I will take our truck.

1200 miles @ 70 mph = 17 hrs.
1200 miles @ 90 mph = 13 hrs.
4 hrs. less driving.
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Old 01-13-2014, 11:11 PM   #15
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Where in the Ca desert are you going?
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Old 01-13-2014, 11:30 PM   #16
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Tail wind helps - but yeah no issues at 90 MPH (144KM/h) - Bleeds gas....
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Old 01-13-2014, 11:54 PM   #17
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Every time I drive to San Fran from LA I get behind a big rig or another vehicle and draft all the way up. Saves tons of gas!
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Old 01-13-2014, 11:57 PM   #18
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I've traveled at sustained speeds between 90-100 on the NYS Thruway and the Beltway in Maryland/Virgina. Mine handled beautifully.Much better than I originally anticipated, to my delight
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Old 01-14-2014, 12:26 AM   #19
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Where in the Ca desert are you going?

Barstow
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Old 01-14-2014, 12:27 AM   #20
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I've traveled at sustained speeds between 90-100 on the NYS Thruway and the Beltway in Maryland/Virgina. Mine handled beautifully.Much better than I originally anticipated, to my delight

great news. Thanks

I set my speed according to my vehicles abilities, my abilities, weather, visibility, traffic and road conditions. Which is close to the speed limit most of the time.
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Old 01-14-2014, 12:33 AM   #21
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Barstow
Sorry, if it was my neck of the desert you could have parked and locked your vet in the driveway here and used the yj.
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Old 01-14-2014, 01:27 AM   #22
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Having owned a full size diesel truck I would say take the truck.Not much else more comfortable on long trips.And you can go further on a tank of fuel so less stops.It is also a heck of a lot more stable at those speeds.
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Old 01-14-2014, 09:31 AM   #23
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Sorry, if it was my neck of the desert you could have parked and locked your vet in the driveway here and used the yj.
Very nice of you...
Thank you anyway.
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Old 01-14-2014, 09:37 AM   #24
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Having owned a full size diesel truck I would say take the truck.Not much else more comfortable on long trips.And you can go further on a tank of fuel so less stops.It is also a heck of a lot more stable at those speeds.
Yes Ford did it right this time with their new diesel. The seats are very comfortable and the engine is quiet. Side winds do not affect it, and it is stable at any speed. It gets very good fuel economy at 70 mph, but I have not driven it at higher speeds for any length of time. I normally only use it to pull our 5th wheel where speeds are normally in the range of 60-70 mph.
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Old 01-14-2014, 10:07 AM   #25
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We have both a JKR and an older F350 psd "6-pack." Although I love the JKR, the F350 is FAR less work to drive long distances. You could pretty much take your hands off the wheel and it would stay in its lane (Homer Simpson autopilot). The JKR requires many more steering inputs per mile- don't know how else to put it. I suppose a JKUR might be a bit better, but for 1200 miles, my vote is "take the truck."
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Old 01-14-2014, 01:43 PM   #26
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We have both a JKR and an older F350 psd "6-pack." Although I love the JKR, the F350 is FAR less work to drive long distances. You could pretty much take your hands off the wheel and it would stay in its lane (Homer Simpson autopilot). The JKR requires many more steering inputs per mile- don't know how else to put it. I suppose a JKUR might be a bit better, but for 1200 miles, my vote is "take the truck."
I need to drive the truck anyway. It has been setting for about a month.
Also the CHP don't scrutinize trucks like they do Corvettes, another plus.
I would also think our Jeeps would be under the CHP "radar", so to speak.
If you drive a Mustang, Vette, Viper, Porsche etc. the CHP goes on alert.
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Old 01-15-2014, 05:32 AM   #27
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You could always rent a vehicle to make the trip and save the money buying diesel
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Old 01-15-2014, 10:52 AM   #28
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Take the Mooney and hitch a ride the rest of the way. Better still trade that low rider in on a Cessna 180 & land at your destination.
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Old 01-15-2014, 11:07 AM   #29
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You could always rent a vehicle to make the trip and save the money buying diesel
I was talking to a friend yesterday, and he made the same suggestion. Fly to Barstow and then rent a vehicle.

Today I take the JKUR out and see how it handles at 90 mph and what mpg it shows using at that speed. I will test it at 80 mph and then at 90 mph. I already know at 70 mph it is fine.

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