RPM ranges

[skifreak]

2020 RAM 1500 4x4 Hemi 20" tires 3.92 axle - wondering about normal RPM. When remote starting cold it is idling at about 1,100 RPM. Seems like it is a bit of a fast idle. Is that normal? At Hwy speed 100-110KM (62-68mph) it is idling at 1,850 RPM. Thinking that is a little high as well. Thoughts - what is the normal RPM at idle after cold start and what is normal RPM highway cruising?

 

[DanAR]

My 2023 with 20” tires and 3.92 revs right at 2,000 rpm at 70 mph. Even fuel injection motors and computer controlled motors typically have a fast idle mode for a cold start. Never paid any attention to my trucks but 1100 rpm for a minute or so after starting on a cool morning and then a slow decrease to curb idle speed doesn’t sound unusual to me.

 

[Bigskyroadglide]

My 2024 warlock 5.7 non etorque 3.92 2k rpm at 70 mph. I'm on 20s as well. My cold start ip idle is about 1k, maybe 1100. Quickly comes down to mid 700s then about 550 after a minute or so