Anybody here got a 350 Cummins?
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Isxrookie, Jun 16, 2020.
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350 BC, 13 speed, 3.73-4.11 gears set for 2350 max rpm. No problem 100k gross with some pump work. Not quick, but not slow. Seen them get 6.5mpg if you drive it like a saint. Dont let it dip below 1750, and you wont have a problem.
ButterBean556, Brettj3876, singlescrewshaker and 3 others Thank this. -
singlescrewshaker and jamespmack Thank this.
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singlescrewshaker and jamespmack Thank this.
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singlescrewshaker and jamespmack Thank this.
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Good starter kit.Brettj3876, SmallPackage, Swine hauler and 3 others Thank this. -
I have a big cam 350.
Definitely those rears are too much. I have 390 Rears and it's the right gearing for me.
My advice to you on more horsepower is to turn the pump up 10% and enjoy it. Those engines run fantastically well and are extremely reliable for a long long time if you leave it just about stock.
Going beyond that can lead to a lot of problems.
It is a simple reliable engine. No problem pulling 80,000 pounds.Brettj3876, SmallPackage, jamespmack and 1 other person Thank this. -
Also different pump codes for factory “custom” ratings and “formula” ratings had different torque rise percentages. This keeps torque climbing up longer and steadier than standard rise and then drop off. That is why sometimes 290’s could out pull 350’s with basically the same timing and setup. The torque rise % is set inside the pump with springs with the “fly weights” and the pump has to be disassembled and broken down in half to get to. Then put on a calibration stand to test it. There were some oldtimer pump men that understood this and could do this very well. I’ve seen a 37 button out pull a 7 because of this. It’s a lost art.ButterBean556, Brettj3876 and singlescrewshaker Thank this.
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