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Old 08-29-2015, 02:48 PM
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2015 JGC 5.7 Top End?

Has anyone top ended out their 2015 5.7 Jeep yet? I'm going to wait a few hundred miles more before I try it. Right now I'm just under 1,000 miles on the clock. I would like to get at least 1,500 or more before I try to wind it up all the way.

Has anyone with the 5.7 HEMI done it? I wonder if it is governed, and if so, at what? A few guys on You Tube have claimed 243 KPH, (which is close to 151 MPH), but I don't know if they're from the States or down under. They might be set up differently. What's the fastest you've gotten your HEMI's up to?

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Old 08-29-2015, 03:12 PM
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Quote:
Originally Posted by billt View Post
Has anyone top ended out their 2015 5.7 Jeep yet? I'm going to wait a few hundred miles more before I try it. Right now I'm just under 1,000 miles on the clock. I would like to get at least 1,500 or more before I try to wind it up all the way.

Has anyone with the 5.7 HEMI done it? I wonder if it is governed, and if so, at what? A few guys on You Tube have claimed 243 KPH, (which is close to 151 MPH), but I don't know if they're from the States or down under. They might be set up differently. What's the fastest you've gotten your HEMI's up to?
They are governed around 120mph, the forteras are only T rated. I think the SRT is 155mph or something like that
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Old 08-29-2015, 04:22 PM
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Re: 2015 JGC 5.7 Top End?

Yes, almost all vehicles are governed based on the tire's speed rating. The exception to this are some high performance vehicles that use Z rated tires - Z06, CTS-V, etc.
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Old 08-29-2015, 04:55 PM
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Re: 2015 JGC 5.7 Top End?

Check what the speed those Goodyear Forteras can handle first, they are limited more than your Jeep.


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Old 08-29-2015, 06:27 PM
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Re: 2015 JGC 5.7 Top End?

As stated by others, I would be concerned about the tires, suspension and brakes could handle a potential top speed. It's the "what if" you had to make a quick transition vs. pointing straight and pushing the accelerator to the floor. SRT version would be the exception.
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Old 08-29-2015, 07:43 PM
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Re: 2015 JGC 5.7 Top End?

Yup, the 2015 5.7 Hemi is supposed to have a top speed around 124Mph with the limiter in place.

Without the limiter, some have said it can do 140Mph +.
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Old 08-29-2015, 08:08 PM
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2015 JGC 5.7 Top End?

It's an SUV man- lol.
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Old 08-29-2015, 08:13 PM
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Re: 2015 JGC 5.7 Top End?

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Originally Posted by Snipe315 View Post
Yup, the 2015 5.7 Hemi is supposed to have a top speed around 124Mph with the limiter in place.

Without the limiter, some have said it can do 140Mph +.
This is the logic I'm having trouble grasping. You pay around $3,200+ more for the 5.7 HEMI option in the Grand Cherokee. Then they deliver it with some crap 115 MPH rated tires. And govern the engine so it won't run anywhere near it's capability in the process.

Now I know this is a real mind full for these guys at Jeep, but how about making 160MPH rated tires part of the engine package? That way you actually have a set of tires capable of doing the speeds the vehicle is capable of.

This makes about as much sense as fishing for Marlin with 5 lb. test line. Or hunting Moose with a .22.
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Old 08-29-2015, 08:37 PM
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Re: 2015 JGC 5.7 Top End?

[QUOTE=billt;1215270]Has anyone top ended out their 2015 5.7 Jeep yet? I'm going to wait a few hundred miles more before I try it. Right now I'm just under 1,000 miles on the clock. I would like to get at least 1,500 or more before I try to wind it up all the way.

Has anyone with the 5.7 HEMI done it? I wonder if it is governed, and if so, at what? A few guys on You Tube have claimed 243 KPH, (which is close to 151 MPH), but I don't know if they're from the States or down under. They might be set up differently. What's the fastest you've gotten your HEMI's up to?

My 2011 went to 99 mph, the ticket said 85 mph.
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Old 08-29-2015, 09:28 PM
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Re: 2015 JGC 5.7 Top End?

I don't need no stinking speed limiter! That went bye bye with the supercharger install (on 3.6). You can remove it with diablosport tuner, and add power at the same time.


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Old 08-29-2015, 10:24 PM
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Re: 2015 JGC 5.7 Top End?

Quote:
Originally Posted by nookie View Post
It's an SUV man- lol.
So is the WK2 SRT... man.
And it goes VERY FAST!


Quote:
Originally Posted by billt View Post
This is the logic I'm having trouble grasping. You pay around $3,200+ more for the 5.7 HEMI option in the Grand Cherokee. Then they deliver it with some crap 115 MPH rated tires. And govern the engine so it won't run anywhere near it's capability in the process.

Now I know this is a real mind full for these guys at Jeep, but how about making 160MPH rated tires part of the engine package? That way you actually have a set of tires capable of doing the speeds the vehicle is capable of.
They DO... on the WK2 SRT.

I do seriously wish there was a Jeep that was Very Fast and could also go off road. Sadly... it seems that I'm just about the only person who actually wants something like this.
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Old 08-30-2015, 06:33 AM
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Re: 2015 JGC 5.7 Top End?

Quote:
Originally Posted by mjb4334 View Post
I don't need no stinking speed limiter! That went bye bye with the supercharger install (on 3.6). You can remove it with diablosport tuner, and add power at the same time.
How big of a deal is this to do? And does it have any effect on your warranty?
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