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110 mph then no more

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My cummins gets to 110 mph nicely but then stops going, is there a governer or did i miss something?
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yes there is a speed limiter. Some new programs like the Smarty allows you to increase the limiter.
 

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What size tires you have? Your probably not going to go a hell of a lot faster we just dont have enough rpms..maybe someone can chime in with gear/tire info and their top speeds?
 

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well if you truck is like mine than you ran out of rpms lol 3200 is all she will do...unless you have the mods to go to 4k and beyond
 

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wow 110 my duramax only went about 95 then no faster when i put efi live in 115 was tops
i have seen 135MPH in my Duramax already,or thats what my Garmin GPS said! o yes thats with EFILive also
 

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I can hit 120 quick and hold it there but I don't get anymore than that.
 

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i had a duramax that i topped out at 142 with gps
 

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yep, no bs on 35x12.50x16 super swamper radials. i use to make trips from decatur to whichta falls every dang day for 6 months. dang women!
 

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I have gotten my truck to 130 but it was well into the red on the tach and screaming!!!! Kinda cool to know it will move like that but I am sure it would't go that fast very far.
 

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My truck used to go 121 with a smarty but I put another engine it last month and its the same year and same tranny and everything and n ow I can only do 110 I dont get it and I set my smarty to my tires
 

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Mine tops out at 112 mph at 3400 rpm
 
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