Top Speed
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Cross-Country
Joined: Mar 2017
Posts: 99
Likes: 5
From: Lewisville, Texas
Top Speed
I was out doing a food run to my 8.5 month pregnant daughter the other day and the empty freeways got the best of me. I punched my 6.7 2019 F250 above my normal 64 mph. I'm sure i'll be crucified for this but I kept accelerating up to about 96 where it stopped accelerating. Funny thing was, it had down shifted to 5th gear and stayed there throughout. I'll never do this again, but is there some sort of governor or something that prevents any further acceleration?
Thanks,
matt
Thanks,
matt
Logistics Pro
Joined: Mar 2019
Posts: 4,064
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First time I experienced it I just thought the truck ran out of HP at that speed. Prior to that the only other vehicle Ive driven with a limiter, was much more noticeable, like the fuel being turned off and on.
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Joined: Feb 2018
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Hotshot
Joined: Oct 2006
Posts: 10,175
Likes: 8,046
From: Texas
Many moons ago, a young fellow I worked with had a ‘73 F100. He dropped in a 428SCJ with a 4 speed top loader. That should have satisfied everybody!!!! It was FAST!
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Cross-Country
Joined: Mar 2017
Posts: 99
Likes: 5
From: Lewisville, Texas
I figured it had been discussed. I guess I'm just not very good at using the search function. Anyway, thanks for the timely response!
matt
matt
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Posting Guru
Joined: Feb 2018
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Not with ForScan. You need a tuner. And since you're corrupting the PCM, you will be fresh out of warranty for anything but a busted moonroof.
Tuned
Joined: Jun 2019
Posts: 320
Likes: 52
They will probably deny any warranty claims for a busted moonroof too. At this point it’s almost normal to have leaking roofs and oil pans.
5th Wheeling
Joined: Nov 2004
Posts: 47
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A 2018 Lariat with the 6.2 and 3.73 gear easily pulls to 120 on the ngauge with a data logged tune built by a reputable tuner. And your pcm is not corrupted and you still have a warranty. And not all dealership service departments are against performance / tow tuning. Top speed limiter can be set or maxed, whatever you want, depending on the flash device and setting access.
Senior User
Joined: Nov 2019
Posts: 314
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yes easily, my chipped 02 7.3 would pull 120. It was about done. It had 330 and 650 ft lb so the 6.7 would have no problem. Now should you trust the tires and the drive shaft at that speed. Tires no, haven't had a shaft out of one yet to see what it is but I wouldn't want to have one fail at that speed. Until the limiter is gone you don't need to worry! Cj