Max Speed

The Judge

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florida
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392
Normally I wouldn't ask nor would I go over 100 but since its a Hemi and Im sure its tempting I'll ask. The max speed is 99 for the ko2 Q. But the ko2 S is a max of 112. Anyone pin it to the floor? Im curious what top speed is. I ordered a black one with headliner and floor mats.
 
It's Jeep being overly cautious and electronically limiting it to 99. But I'm willing to bet a few are able to eek out a few MPH more. I think I read (maybe Car and Driver?) that the 110 limiter on the XR ran to 112…
 
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It's Jeep being overly cautious and electronically limiting it to 99. But I'm willing to bet a few are able to eek out a few MPH more. I think I read (maybe Car and Driver?) that the 110 limiter on the XR ran to 114....
Really I read differently. I was just looking for a max. I know its over 100. You sound like a car salesman for Jeep trying to take out the aftermarket guys. Too pro XR package. Tone it down...No offense!
 
Really I read differently. I was just looking for a max. I know its over 100. You sound like a car salesman for Jeep trying to take out the aftermarket guys. Too pro XR package. Tone it down...No offense!
lol what? Jeep has a limit of 99 set on the 392. XR is 110. The computer won't let you go over those. Maybe 1-2 mph but that's it. It literally won't go over that bc the computer won't allow it. Now if you override that somehow and take the governor off then that's a different story. But the way you take the Jeep at delivery, max speed is 99 or 110.

*not a Jeep salesman
 
Really I read differently. I was just looking for a max. I know its over 100. You sound like a car salesman for Jeep trying to take out the aftermarket guys. Too pro XR package. Tone it down...No offense!

Current Rides: mountain bike

Stick with the mountain bike.
 
Its the tire speed. There is no way in hell that a rig with 35 tires is going to have a hire max speed set from factory. You guys are Jokers and sound like used car salesman looking to get max dollars out of a recon because they discontinued them for now...A fucking joke!.. The forum used to be good now its filled with crap..
 
Its the tire speed. There is no way in hell that a rig with 35 tires is going to have a hire max speed set from factory. You guys are Jokers and sound like used car salesman looking to get max dollars out of a recon because they discontinued them for now...A fucking joke!.. The forum used to be good now its filled with crap..
Are you not familiar with governors? It's not the physical limit, it's the limit Jeep sets. The computer won't let you go faster. If you take the governors off, sure the 33's will go faster than the 35's. But the computer on the regular limits you to 99 and the XR limits you to 110. If you don't believe us, you can read it here.


Our Jeep test car was equipped with the Xtreme Recon package, too, and had 315/70 BFGoodrich K02 all-terrain tires. It raced through the quarter-mile in 12.9 seconds at 104 mph and reached 110 mph in 15.0 seconds. Its top speed is governed at 112 mph.


We'll start by saying that the four-door-only (hence the "Unlimited" part) Jeep Wrangler Rubicon 392 has a speed limiter at 100.5 mph. We know this because our Jeep 392 smacked right into said limiter in well under 13 seconds of full-throttle acceleration at our test track. And it rode that speed limiter right through the quarter-mile, which passes in 13.3 seconds.
 
Apparently, physics is “crap…” a larger diameter travels less rotational distance at a given speed than a smaller one. Therefore, with the same rotational limit, the larger diameter has a higher speed. Physics and math. I guess we used car salesmen remembered to do our homework in high school.
 
Apparently, physics is “crap…” a larger diameter travels less rotational distance at a given speed than a smaller one. Therefore, with the same rotational limit, the larger diameter has a higher speed. Physics and math. I guess we used car salesmen remembered to do our homework in high school.
Yea I have no idea which one would go faster with no governors. I would think 33s due to weight but no clue for sure. I do know with the governors on them, the XR will go faster. I have an XR but I'll never go 100 in it unless it's on track at Jeep Beach and idk if they allow you to go that fast.
 
This guy has just about got to be trolling :ROFLMAO:. Cracking me up..

I don't think anybody here thinks the XR's are dramatically better than non XR's. They just have some mods installed from the factory that anyone can do to their 392 anyway. One of those is a higher top speed governor.
You could get a tuner and get rid of the governor. My XR has yet to see 100mph. I have no personal need to drive my Jeep that fast. I did hit 90mph passing some poor soul.

These thing do feel like they defy physics to some degree. A brick has no business accelerating or going this fast :)
 
Yea I have no idea which one would go faster with no governors. I would think 33s due to weight but no clue for sure. I do know with the governors on them, the XR will go faster. I have an XR but I'll never go 100 in it unless it's on track at Jeep Beach and idk if they allow you to go that fast.
Pretty sure the 33's and 3.73 would top out higher. If nothing else due to less wind resistance (1 inch lower).
 
Absolutely… IF Jeep didn’t govern them based on tire size ratings.

3:73 and 35’s would top out even higher…. Again IF

***Edit*** With no governor, the engine’s RPMs are the limiting factor. Going back to my earlier post, larger diameter, less RPM, higher max speed.
 
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lol what is this thread even

Anyways does anyone know if the trail dash system (which you could remove governor) flags the same drivetrain void warranty message that the livernois tune does?

Honestly though I have other cars in the garage for speed, drive this sucker like an old hot rod and boy do I love the exhaust with off road+ and the tiptronic shifter. Haven’t come too close to the governor , non-xr
 
The OP is looking to start crap.
I've seen very little "crap" on this forum which is wonderful. Sometimes entertaining to watch folks flame each other, get into peeing contests, etc, but overall is very distracting. If folks want to "fight" or otherwise argue, maybe could start a "fight" subforum and let them duke it out. This is a great community. After all........only the coolest people have the coolest jeeps ;)
 
I've seen very little "crap" on this forum which is wonderful. Sometimes entertaining to watch folks flame each other, get into peeing contests, etc, but overall is very distracting. If folks want to "fight" or otherwise argue, maybe could start a "fight" subforum and let them duke it out. This is a great community. After all........only the coolest people have the coolest jeeps ;)

Amen and hallelujah. Honestly I feel like people who own 392’s belong to a very exclusive club. We should sell 392 club merch. Hint hint.

It reminds me of the exclusive TV crime fighting group called the A Team from the 1980’s. Remember the opening lines?

"In 1972, a crack commando unit was sent to prison by a military court for a crime they didn't commit. These men promptly escaped from a maximum security stockade to the Los Angeles underground. Today, still wanted by the government they survive as soldiers of fortune. If you have a problem, if no one else can help, and if you can find them....maybe you can hire The A-Team."

Here’s the 392 club version:

"In 1972, middle aged men were sent to a Jeep stealership for a crime they didn't commit. These men promptly escaped from the Jeep dealer and 50 years later some are still waiting for their 392’s to arrive. Today, still wanted by the government, they survive as soldiers of forums. If you have no 392, if no one else can help, and if you can find them....maybe these middle aged Hemi daddy’s will let you ride in a 392."
 
Really I read differently. I was just looking for a max. I know its over 100. You sound like a car salesman for Jeep trying to take out the aftermarket guys. Too pro XR package. Tone it down...No offense!
XR is limited to 110
std set up limited to 99

neither speed is limited due to physical characteristic. It’s in the programming.
my GC SRT was limited to 160.
tires, are rated accordingly.
i will say, rolling at 100 on a solid axle, body on frame brick, that’s not designed for speed, seems fast enough.
 
XR is limited to 110
std set up limited to 99

neither speed is limited due to physical characteristic. It’s in the programming.
my GC SRT was limited to 160.
tires, are rated accordingly.
i will say, rolling at 100 on a solid axle, body on frame brick, that’s not designed for speed, seems fast enough.
Horsepower vs Wind resistance is ultimate limiting factor. Would be interesting to find out but I wouldn't do it myself. Maybe someone will put proper tires for speed and take it to a salt flat or something.


I punched in some numbers here from looking at different sites on web and came up with 155 mph based on cd.48 frontal area 30ft2 and weight 5200 That ended up needing 390hp which is about what these make at the wheels.
 
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