2nd Gen Non-Engine/Transmission top end speed

[rrab1]

Guy's, went on a fishing trip and my freind ask how fast the cummins can go and I said lets find out from 55mph to 105 mph I had great pick-up but it was like I hit a wall from 105 to 108 took forever is this a sign of a bad lift pump or a sign of lack of better judgment thanks Don

 

[FFutch]

What rear ratio?

If you got 4. 10's that's probably as fast as you're going to go. My truck(5spd. with 3. 55s)tachs out at about 125... . Doug

 

[Mundgyver]

If I'm not mistaken, I think at that speed you start having the fuel cut back by the computer. I believe that the truck is limited to around 115. I've had mine to 110 and seem to have alot more to roll into for throttle if I want. That was when I had just the EZ. I'm not sure now with the 275's and EZ-comp. Tis alot quicker now.

 

[Extreme1]

Too many valves slow you down!

Too bad you have too many valves, a 4000 RPM governor spring kit might raise your top speed a bit. Oo. :-laf

 

[WadePatton]

Yeah, what's the gear? Mine goes to 110 with ease, but I haven't pushed it any further. I always run out of road and I'm fretting about my lift pump until I get a low pressure gauge on it.



Stock 235 6sp 3. 54's and 265 tires.

 

[WDaniels]

Wow, my 97 2500 with 3. 54's will do 100 on the money and not a mph over. Wonder what's wrong.

WD

 

[Good Ole Bob]

About a month ago, I was heading out Beaumont, Texas toward Houston on IH10, and I was following another CTD, and he must have had a box or something, 'cause he was showing some black smoke when he would pass other cars. When I got the chance and the road was clear, I tried to catch up to him, but when I hit 110, I let up as he was leaving me. I don't know how fast he was going. I have had mine up to about 114, and quit because I was running out of open space. :-laf