Thread: Mass air flow of Ranger 3.2 and of 300tdi air filter

Firstly the 300tdi filter assembly is too small for a 3.2TD and even marginal on the tdi. Automotive filters are often on the small side due to space considerations. Off-Highway filters are not which is why the sizes you are getting are larger, plus they are optimising around WOT rather than typical driving.

Originally Posted by Beery

Have you looked into the Donaldson Powercore ( I think thats what they're called) filters? They were designed to be compact with high flow capabilities but still provide proper filtration.
From memory they were developed for F250's and Rams.
Not sure what differwnt sizes they make though.

The powercore is the most compact filter available. However I would only use one if absolutely necessary as they have a higher pressure drop than a conventional filter with the same surface (filter) area.

MANN+HUMMEL had a similar product called the compact plus, however AFAIK they have discontinued development of new models.
Instead they are going for a "variopleat" system for applications where the filter needs to be as small as possible. These systems look like they perform better than the powercore. However there are only a few models available at present last I heard.



https://blog.mann-hummel.com/en/wp-c...Featured-1.png

Quick update, all the usual suspects, Donaldson, Mann, Cummins air filter housing were too large for the space with the required air flow.

A filter engineer was consulted and despite the figures suggesting need for +585CFM flow it would be safe to use a filter with 360CFM flow.

We've gone with a flat panel filter from an 7.3L F350 TDV8 and custom box to suit the space.

Should be a better solution than massaging an air box from a different manufacturer into the space with all the compromises that come with that.

That problem solved, move onto the next in line.