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Top Speed ?

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Old Aug 30, 2006 | 04:23 PM
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Question Top Speed ?

I have a 03, 6.0 6 spd running 3:73 gears. 4" MBRP exhaust and Quadzilla intake.
Can anyone tell me at what mph the 6.0 will run with the limiter disabled ?
I'm looking for the number where horsepower can no longer overcome vehicle weight and aerodynamic drag.
Will the 6.0 hit the governed engine speed before reaching max mph?
A dodge started all this is all I will say for now.
 
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Old Aug 30, 2006 | 04:41 PM
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I read in the Superchips tuner thread the Guru Vic Ferrari let it hang out at 141mph....
 
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Old Aug 30, 2006 | 04:50 PM
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I had mine about 107 before i was dragging, but being that it's a dually i'm sure that caused it to start getting hard to increase speed quicker then a single axle truck. My old dodge got to 120 easy and that was with the governor still on(i didnt do any performance mods to that truck). I believe that even though the speedo goes to 100, I think it starts cutting back at 98 or 99 if you still have the governor on.
 
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Old Aug 30, 2006 | 05:00 PM
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I hammered mine in Okalahoma on a long straight stretch and the speedo quit at 96 but the truck was still accelerating. The Edge Attitude was registering 128 before I backed down for a hill.
 
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Old Aug 30, 2006 | 05:57 PM
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Thats strange, mine went all the way to 100 and then it quit. If my Outlook Monitor was correct, I was going about 107.
 
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Old Aug 30, 2006 | 07:19 PM
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Mine goes back to zero after it goes over 100--lets talk RPM's with what rearend and what tire--at least we can get close
 
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Old Aug 30, 2006 | 08:57 PM
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I guess what I would like to know is wheather the 6.0 will run up to it's engine goverened speed? Mine stops pulling at 97 - 98 mph, by the speedo. I still have a lot of rpm's left before I hit redline, but will it pull itself much faster if the limiter gets broken ?
I have a 99 with a 7.3, same gears and it will tach out at around 120. It will pull up to max engine rpm. ( not stock )
The rpms on the 6.0 were around 2750 when it shut down. Just doing a little in my head figuring, it looks like 125 should be a good number if it has enough power to pull it. Thanks for the reply's, much appreciated.
 
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Old Aug 30, 2006 | 09:53 PM
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I recall stock having enough power for 125+ I believe Daryl Hunter did the calcs.

One user hit 154 with a custom tuned 6.0, exhaust and water/methanol injection. You need to run 100% torque convertor lockup in O/D for this. It was wound out over 4,000rpm and the egt gauge was pinned above 1600. Too bad the pics are gone.

Don't forget to fold in the mirrors.
 
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Old Aug 30, 2006 | 09:58 PM
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https://www.ford-trucks.com/forums/3...ight=top+speed
 
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Old Aug 31, 2006 | 05:37 AM
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That's the dude that tunes my truck. He knows soooo much more now that he did then. You should see what one does on just #2 when tuned correctly.
 
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