is there something i can fix or are these trucks really this slow
#21
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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 .
P.S. The Cummins didn't let you down. The Dodge did. There's a difference.
The chevy didn't break anything 'cause it's only making half the torque as the Cummins .
P.S. The Cummins didn't let you down. The Dodge did. There's a difference.
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.
Last edited by Chevy355mark; 02-07-2011 at 12:19 AM. Reason: Automerged Doublepost
#25
you maybe right, but im pretty sure 90 to 95 ill be pushin close to 3000. Ill check it out tomorrow
#26
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".
#27
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".
With a 3.55 rear end, 0.75 5th gear (OD) ratio, and 30 inch tires Im running about 2950 RPM at 99 MPH (what my truck max's out at). With all the rest the same except with 32 inch tires you're looking at about 2770 RPM. You can google search and find the formula for all that
#30