2012 V6 Mustang Top Speed - Page 2 - Ford Mustang Forum
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Ford sends the car out from the factory with a black belt gremlin installed under the car. At precisely 135 mph the gremlin is trained to swing a machete at your drive shaft to cut it in half.



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Quote:
Originally Posted by V6FTW View Post

Apparently, the top speed on the new V6's is 113 and at 135+ the drive train will fail causing immediate engine failure.
No. I've had mine at 140 over a sustained distance of several miles and at 130 at least a dozen or more times, running uphill on a 6% grade over a distance of nearly a mile at a time. She's still solid as a rock, no matter how many times I do this.

I saw a video someone posted of their V6 blowing apart between 135-140, but I also noticed something else: they kept that poor thing wound up around 6K RPM the whole time.

I was in 5th gear at around 4,500-4,700 RPM @ 140 (back when I had the 2.73's). I wasn't winding the dog snot out of it. The 3.55's put me at near the same RPM's in 6th.

Sure, you can rev up to 6K-7.5K all you want for maybe a second or two between shifts on quick sprints, but don't keep your pony wound up there in Alpha Zone while you're screaming down the freeway. There's a right way and a wrong way to do anything.

If you want to test top speed, then be as safe as possible but don't fear an automatic explosion. Just use some good sense.

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I missed the track thing, too (on the exploding DS video), but still: he had it wound up there for what seemed an awful long period of time.
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Quote:
Originally Posted by V6 Cannonballer View Post
No. I've had mine at 140 over a sustained distance of several miles and at 130 at least a dozen or more times, running uphill on a 6% grade over a distance of nearly a mile at a time. She's still solid as a rock, no matter how many times I do this.

I saw a video someone posted of their V6 blowing apart between 135-140, but I also noticed something else: they kept that poor thing wound up around 6K RPM the whole time.

I was in 5th gear at around 4,500-4,700 RPM @ 140 (back when I had the 2.73's). I wasn't winding the dog snot out of it. The 3.55's put me at near the same RPM's in 6th.

Sure, you can rev up to 6K-7.5K all you want for maybe a second or two between shifts on quick sprints, but don't keep your pony wound up there in Alpha Zone while you're screaming down the freeway. There's a right way and a wrong way to do anything.

If you want to test top speed, then be as safe as possible but don't fear an automatic explosion. Just use some good sense.
You may want to remember that 6th gear is an "overdrive." That means the driveshaft RPM is higher then the motor RPM.

I spoke to a Ford "tech guy" at the Barrett-Jackson auction in Phoenix last week. He was very clear that the 2011 V6 speed limiter was there to protect the drive-shaft. Lots of things will work "some of the time." In Ford's case, the drive-shaft has to work "every time." Thus, the limiter.

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Last edited by Radioguy; 01-25-2012 at 11:12 PM. Reason: spell
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The gear your in does not make your driveshaft spin faster or slower. The driveshaft spins in synch with the rear wheels.

I got my new shaft on but I don't plan on testing if its worthy on a high speed run lol.. once you've seen the baby bolts that hold the driveshaft in place it kinda makes you rethink how the entire drive line doesn't snap when you step on it.

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You learn something new every day. Good info, I suppose? Makes sense, now that I think about it. Sad, as old as I am and I never gave that any thought.

Oh well. I just thank Ford and dem silly Chinese that I got one of the models that passed a QC check!
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Quote:
Originally Posted by wrxified View Post
Ford sends the car out from the factory with a black belt gremlin installed under the car. At precisely 135 mph the gremlin is trained to swing a machete at your drive shaft to cut it in half.
WOW, is that true? Do you have any idea of where it's at? I mean, I would think that PETA, the Humane Society, or ACLU would get involved with something as flagrant as making a size challenged gremlin stay in a dangerous situation like that! Somebody should do something about this!!!


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I dont know about the gremlin but I just assumed the limiter would cut me off at around 115, but I looked up and I was running at 120+ and I have no tune or anything. I have actually done this twice. Now I will admit that I felt the car getting ready to pull up but it definately got above 113or 115 whatever the cut off is.
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Yea, Im not sure its an exact number (for whatever reason) but it seems that the limiter kicks in in the range of 113-117 MPH.

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My limiter always topped me out at 113 MPH on flat runs, though I could hit almost 120 on slight declines.

I've only experienced the nose float once, in a freeway curve at 110. It got my attention. Otherwise, the straight run at 140 felt just as planted as 70. But then, this is not a suspension or handling thread.

I am curious whether I can reach 160, but I don't dare try in current circumstances.
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post #26 of 67 (permalink) Old 01-26-2012 Thread Starter
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Went back tonight and got to 130 without the limiter kicking the car off. I'll try to rig a camera set up to get proof for you all, because I'm not really comfortable trying to hold a camera and drive a car going 130+ at the same time.

To answer some questions:

As to my knowledge, the car is stock. I'm the first owner but the car had 700+ miles on it when I bought it. So, I would be interested to know if someone from the Ford dealership got a hold of it. Lol.

It's a 2012 V6 Premium with the "performance package" and a K&N air filter.

The race track is not on an incline at all. 5 miles of straight blacktop.
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I'd put money on it being tuned

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Quote:
Originally Posted by wrxified View Post
Ford sends the car out from the factory with a black belt gremlin installed under the car. At precisely 135 mph the gremlin is trained to swing a machete at your drive shaft to cut it in half.
To the op, make sure the black belt gremlin is uninstalled before you try again.

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Quote:
Originally Posted by B-Unit View Post
Yea, Im not sure its an exact number (for whatever reason) but it seems that the limiter kicks in in the range of 113-117 MPH.
The night I bought my car I thought I'd give it a brief blast to upwards of 100MPH, and it surprised me that at ~117MPG it almost 'hunted' for a speed. Sort of like modulating the gas pedal oh so slightly. When I told some friends, they said I was not being truthful in that 113 is the top speed, but I did see 117MPH briefly.

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You guys are all assuming that the speedometer is reading correctly, THEY DON'T.

The higher the speed the more the inaccuracy.


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