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Rounded_nut · 06-25-2018, **(Subject: CM2350 rpm range )**

Search didn't yield an answer, and I only vaguely recall some numbers.... I know you can't lug this engine (2014 CM2350), I typically run 1550-1700 rpm, but what is the safe upper end for sustained pulls or cruising?

Rawze · 06-25-2018, **(Subject: CM2350 rpm range )**

rpm range under load is roughly 1100 - 2100.

- 1650 under heavy loads is where they will have the least amount of wear long term.

Rounded_nut · 06-25-2018, **(Subject: CM2350 rpm range )**

(06-25-2018 )Rawze Wrote: rpm range under load is roughly 1100 - 2100.

- 1650 under heavy loads is where they will have the least amount of wear long term.

Wow that's higher than I thought, thanks for the info, at 1800 the dang thing is screaming so made me think twice.

imalumberjack · 06-25-2018, **(Subject: CM2350 rpm range )**

on occasion I drive a 2018 pete with isx 15 cm 2350 set at 565hp and 18 speed. This isn't rocket science perfect only seat of the pants feel .....engine seemed to be happiest 1400- 1700rpms when pulling. This seemed a little low to me as the other truck I drive has a cat and its happiest 1500-1700. just my opinion.

iceman · 06-26-2018, **(Subject: CM2350 rpm range )**

https://www.youtube.com/watch?v=afQb7UH5koE&t=308s
For those that haven't seen it around the 3 to 4 minute mark in the video. Excellent conversion on how to make the engine last yet get the fuel mileage.

Jorg81 · 07-18-2018, **(Subject: CM2350 rpm range )**

(06-26-2018 )iceman Wrote: https://www.youtube.com/watch?v=afQb7UH5koE&t=308s
For those that haven't seen it around the 3 to 4 minute mark in the video. Excellent conversion on how to make the engine last yet get the fuel mileage.

I guess I don’t understand the fuel mileage part of this. I used to run slower at lower RPMs in my cM 2350 @55 mph and 12-1300 rpm and I got decent fuel mileage. Now I run fast because of the job I’m doing needs me to @ above 1500 rpms and I get terrible fuel mileage? Do you have to run slower at higher RPMs in a lower gear or something to get good fuel mileage?

Rawze · 07-18-2018, **(Subject: CM2350 rpm range )**

(07-18-2018 )Jorg81 Wrote: ...
Now I run fast
...

That is your problem. Unless your getting paid a lot extra to cover those higher fuel costs,... you are only letting someone else benefit while you do nothing but waste profits.

JMBT · 07-18-2018, **(Subject: CM2350 rpm range )**

Great advice in the video, even for a "seasoned" owner operator!!!

Chamberpains · 07-18-2018, **(Subject: CM2350 rpm range )**

Jorg81 Wrote:I guess I don’t understand the fuel mileage part of this. I used to run slower at lower RPMs in my cM 2350 @55 mph and 12-1300 rpm and I got decent fuel mileage. Now I run fast because of the job I’m doing needs me to @ above 1500 rpms and I get terrible fuel mileage? Do you have to run slower at higher RPMs in a lower gear or something to get good fuel mileage?

What job do you do that you need to run faster? The faster you run, the harder it has to work to maintain that speed. The key to fuel mileage is to not use all of the fuel peddle. Never use anything past 70% of it. The higher RPM's are good when your pulling weight up hills. Instead of lugging it down in the rpm's on a pull with your foot to the floor. Try dropping a gear, get the rpm's up and only push the peddle 50% of the way down to pull the hill. Its the same speed but higher rpm's. It takes stress off the driveline, less heat, and slightly better fuel mileage. Remember, your not in a race. Your getting paid to safely pull weight and freight. Stop being in a hurry. If you own and operate your equipment it's counterproductive and a waste of money to hammer your equipment.