Air Flow CFM?

[Kevin Means]

We're planning to replace the stock air intake filter with a Donaldson D090266 air filter system (or similar if someone has a better idea) We need a vertically mounted filter, because the front wall of the habitat will be about one foot behind the cab. While researching air intake systems, I noticed that many of them list their CFM airflow, but I can't find a listing of our CAT 3116's airflow to verify compatibility. Ours is a stock 225 HP 3116. Anyone know its airflow?

Kevin

 

[GeneralDisorder]

We're planning to replace the stock air intake filter with a Donaldson D090266 air filter system (or similar if someone has a better idea) We need a vertically mounted filter, because the front wall of the habitat will be about one foot behind the cab. While researching air intake systems, I noticed that many of them list their CFM airflow, but I can't find a listing of our CAT 3116's airflow to verify compatibility. Ours is a stock 225 HP 3116. Anyone know its airflow?

Kevin

https://www.carburetion.com/calc.asp

288 CFM.

CFM of the filter needs to be AT LEAST 288 CFM even when the filter is plugged and needs to be replaced and the filter size has to be large enough that cleaning it isn't a nuisance - a simple 2" diameter unrestricted pipe flows 1,615 CFM (at sea level atmopsheric pressure ~14.7 psi) for example. The size of the filter is largely a function of the filter surface area and how often you want to clean/change it. If you plan a lot of off-road, especially dusty conditions, you want a LARGE filter or several of them so they don't clog up immediately.

My point is that bascially ANY filter is going to flow that much air - because that much air (at atmospheric pressure) will flow through a 1" diameter pipe that's 4' long...... right up till the filter on the end of it clogs up - which if it's just the end of a 1" diameter pipe then the surface area is about 3.14 sqaure inches which would clog up almost immediately. Now of course the filter itself is a restriction but this goes up exponentially (squared) as the orifice increases in diameter so it becomes a non-issue in a hurry. Plus you never just stretch the filter material over the end of the pipe - it's always in some sort of pleated arrangement to increase it's surface area.......

What you need to decide on is how much filter Surface Area you want and how dirty of an environment you will be in..... now you see how the truck ended up with a filter the size of a trash can........

 

[Kevin Means]

Makes sense. Thanks General, and yes, that OEM filter is quite a barrel!. Based on your info, I just ordered a Donaldson PSD D100366 filter assembly, which is a bit larger than the 090266 model I was originally looking at. Thanks again.

Kevin