I can’t really complain about the one I drive. It’s about to turn 200K and no problems yet.
Now I CAN complain about the automatic boat anchor transmission and rear end gearing that has you at a max of 1150 rpm in top gear.
X-15 Cummins thread
Discussion in 'Peterbilt Forum' started by KB3MMX, Feb 26, 2018.
Page 39 of 44
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My X15 is working really good so far, 18 over with 370 gears. It works a lot like the N-14. My rpm's run in the sweet spot about 1750 at 75 mph.
Also, the fuel consumption is good, In my line of work I'm hauling payloads of 45 ton. This is a 605 hp engine, so it is strong.
Also, the rpm will run over 2300 rpm, only had it up there a few times but it will go there. I've run the engine high in the rpm's since day one.
I have been told by my Cummins mechanic that the 605 block was designed after the N-14 block, Not sure if this is true or not.
All I know? She has to spin a lot of times before the last payment is made.
Was at a truck show a cpl yrs ago, run into one of the Cummins rep;s. After some #### chat He looked me straight in the eye, said to me, How high you running your rpm's? I locked up for a second, I knew He already knew the answer, electronics and all. I swallowed, told Him I had it over 23 a few times. He said PERFECT, don't be afraid to open it up. He has great confidence, like that about the Man. -
Thankfully my truck is of the age where that’s possible, but now all the new ones we’re getting have a speed limiter setting in 10th and 11th gear that doesn’t allow revving over 1150 with the cruise on. -
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X15 500V @1900 GOV@2000 1850@950
Productivity Series (2021 Emissions) -
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After reading this makes me happy I stayed with Detroit on my new Western star I ordered instead of Cummins. Had 2 isx before about broke me. Bring back the N14.
BigHossVolvo, xsetra, jsnell and 1 other person Thank this. -
jason6541 Thanks this.
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