Originally Posted by EasternAggie
(Post 704231)
For him I think its simply a result of 4.10 gears with stock gov springs. By the time the truck is hitting 75-80 mph, its probably already starting to defuel.
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Originally Posted by dieseldude03
(Post 703908)
I'd leave the 4.10's in there running 35's. I believe 2800 rpm is the max governed rpm's for your engine and being bone stock, it's definitely not going to be a rocket ship. Be sure you are getting full fuel flow/pressure to the lift and injection pumps, perform a couple free mods and throw in the 4000 rpm springs and it will seem like an entirely different truck!
The chevy didn't break anything 'cause it's only making half the torque as the Cummins :w2:. P.S. The Cummins didn't let you down. The Dodge did. There's a difference. :tu: its hard to even get the motivation to work on the dodge because it ALWAYS runs and gets me where i need to go no matter what. i dont want to even mess with the truck. |
I have the same problem with my 4.10 gears. Gotta find some top end. Going to look into the gsk upgrades
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i got a 97 3500 dually with 3.55s in it i believe, and 90 is about as much as your going to get outta her. but like you said 80 and im about to the floor
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Originally Posted by WaitinOnaCummins
(Post 704904)
i got a 97 3500 dually with 3.55s in it i believe, and 90 is about as much as your going to get outta her. but like you said 80 and im about to the floor
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Originally Posted by EasternAggie
(Post 704910)
I would think with 3.55's you should be able to get 100. With an NV4500, 3.55's, and 30 inch tires my Ford will hit 99. If you had 31's or 32's that number would even go up a little bit.
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honestly if you add everything up on a gear ratio calculator the truck should pull 100mph with ease. at 2850rpm with a .71 overdrive, 4.10 rear end and 35" tires 80mph simply doesn't add up. the only thing that could make this realistic is 1- my speedometer is 5mph slow, and 2, bfgs suck and never run true to their size, i bet they measure out 32 or 33", even a true 35" tire that runs big like a mickey thompson still only measures a true 33 and 1/2" tall, MAYBE 34".
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Originally Posted by Chevy355mark
(Post 705121)
honestly if you add everything up on a gear ratio calculator the truck should pull 100mph with ease. at 2850rpm with a .71 overdrive, 4.10 rear end and 35" tires 80mph simply doesn't add up. the only thing that could make this realistic is 1- my speedometer is 5mph slow, and 2, bfgs suck and never run true to their size, i bet they measure out 32 or 33", even a true 35" tire that runs big like a mickey thompson still only measures a true 33 and 1/2" tall, MAYBE 34".
Originally Posted by WaitinOnaCummins
(Post 704966)
you maybe right, but im pretty sure 90 to 95 ill be pushin close to 3000. Ill check it out tomorrow:tu:
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well i crawled under my buddys truck and read the tag on the diff and he has 3.54s.
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Originally Posted by Chevy355mark
(Post 708127)
well i crawled under my buddys truck and read the tag on the diff and he has 3.54s.
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i have 4:10 gears on 33's and with the stock gov springs it would run 85mph and no problem holding it there it wanted to go faster plus gov springs and vaule springs arent alot of cash buy em
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