Oliver Hevvy
Precision Fit
- Jun 21, 2013
- 628
- First Name
- Oliver
- Willys Model
- Pickup
- Willys Year:
- 1951
K&N has done a great job of convincing people their filters are "better". They do flow more air per square inch than a pleated paper, OEM type.
But: they do not filter as well. More extra-fine dust gets in, and this increases cylinder and ring wear especially.
How do I know this? Back in the late 90s sometime, I got a copy of a detailed study run by a major heavy-equipment operator on filter effectiveness, change intervals, etc. When you own 500 bulldozers you care a lot about what filter is best and how often to change it. Their conclusion was that OEM type pleated paper filters better than anything else.
Want more proof? Go down to your local heavy equipment dealer and ask them what kinds of air filters they use. When you spend a quarter-million or more on a piece of equipment, you don't cut corners on a $2 part.
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On vehicles I have with round air cleaners, I usually stack two of them to get more area and more flow, if the hood allows it.
But: they do not filter as well. More extra-fine dust gets in, and this increases cylinder and ring wear especially.
How do I know this? Back in the late 90s sometime, I got a copy of a detailed study run by a major heavy-equipment operator on filter effectiveness, change intervals, etc. When you own 500 bulldozers you care a lot about what filter is best and how often to change it. Their conclusion was that OEM type pleated paper filters better than anything else.
Want more proof? Go down to your local heavy equipment dealer and ask them what kinds of air filters they use. When you spend a quarter-million or more on a piece of equipment, you don't cut corners on a $2 part.
---
On vehicles I have with round air cleaners, I usually stack two of them to get more area and more flow, if the hood allows it.