Best rpm to idle for engine + hvac

900-1000

 

I don't think the temperatures will get high enough without a load on the engine even at high idle. It should spool up the turbo and set the RPM automatically when it needs to burn soot. A lot of people bump the idle to increase oil pressure.

 

Doesnt really help sadly and CAN make it even worse in some cases. Just wont get hot enough in MOST cases. Then again its also a lot better then nothing. If your already having soot problems its usually going to end up being a drop the can and clear and/or replace issue more often then not.

If your trying to prevent issues just not idleing is best. There is a reason APUs are getting to the point they are basically required equipment.

 

If you idle up an emission engine with no load on it all it will do is burn fuel and pump DEF into your exhaust. You’ll never get it hot enough to burn soot just idling, it will idle up automatically when the soot load gets high

 

Actually my observation is I’m seeing less and less APU on new equipment. Seems kinda strange to me ( I run old junk ) I’ve been keeping track the last few years and seeing less and less. I am wondering as this anti idle thing comes more into play with this next round of emissions what’s going to happen? Dose that make “opti idle” cost more? Will it be eliminated because of emissions? How come we don’t need def and a filter on refers and apu? Didn’t California eliminate all small engines last year? What are you supposed to use there for comfort?

 

I have a habit anytime I pull the parking brake to hit the cruise for a higher idle. One click and it brings it up to about 850-900 and leave it there.

 

We may run diffrent lanes. Where i live the reverse is true and most of the trucks near me when i park at night seem to run them. But i also rarely hit up ma and pas so it may be just i see more O/Os then megas. Though the megas are tending to swap to EAPUs since they are typically more reliable for how they are used.

As towards not requreing def. Thats becomeing a thing. When i went looking for a replacement for my thermocant crypack most of them required def. As for cali, that place is a 3rd world ####hole that sees us drivers as less then animals.....so dont know nor care what they do lol.

 

Up side to using a portable generator... I can run it anywhere even CA.