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LVSteve
Member
That's surprising. Which model?
Nasty filters from my truck
- Thread starter LVSteve
- Start date
That's surprising. Which model?
Rastoff
US Veteran
Yes, I'm sure there are plenty of wonderful things K&N has to say about their filters on their website.
I've used K&N filters. I've tried different spark plugs. I've used many of the wonder products out there and none of them have done what they claim. K&N claims that you'll get better gas mileage with their filters; you won't. They claim better filtering. How do you know? I mean, besides what it says on their own website, how do you know?
I still maintain that some of those tiny seeds could have gotten through a K&N filter.
JcMack
Member
Looks like marijuana seeds.
I would like to see more independent testing, too. However, they do state that they follow the testing protocol specified by ISO 5011, previously SAE J-726. They claim 94+% filtering depending on model, which matches one independent test I found. I find it hard to believe they would risk false claims on an easily verifiable standardized test. I always take the horsepower/mileage claims with a grain of salt, too. Some of the claims are within the uncertainty of the measurements. I've tried roller rockers (supposedly 5 HP) and windage trays (5 HP), and neither showed a measureable improvement in quarter mile times or speed. I didn't necessarily buy my filter based on their claims, I liked the fact that they are reuseable.
And don't all the filter manufacturers claim theirs is the best? So, like you said, how do you know?
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LVSteve
Member
I'm in the right state for it. Maybe somebody dumped their stash down the HVAC intake.
It also increases the restriction to the intake of the fan. Increasing inlet restrictions can work a fan to the point of failure. Most common HVAC home fan failure.
Not even close.
And you know this because....?
Research....
The Batmobiles (2008 Mercury Grand Marquis) doesn't have them either. So far I'm still breathing.
Rastoff
US Veteran
Yeah, me too, but then, all filters are re-usable.
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LVSteve
Member
Just install paper filters backwards and they are self-cleaning!
Question to all auto-makers - Why do you make it so hard to access the air filters and even more difficult to change them?
I remember when when one wingnut was the only device holding the cover of the air filter housing on top of the carburetor! The air filter could be replaced in less that a minute. Now days it takes several minutes just to FIND the air filter housing and ten minutes to undo all of the snaps, latches, screws to access it. Once you have all of the attaching items free, you discover that other parts of the car are preventing the removal of the air cleaner housing cover so they have to be re-positioned/removed. Changing the air filter is now a 30 to 45 minute task if you are lucky.
I remember when when one wingnut was the only device holding the cover of the air filter housing on top of the carburetor! The air filter could be replaced in less that a minute. Now days it takes several minutes just to FIND the air filter housing and ten minutes to undo all of the snaps, latches, screws to access it. Once you have all of the attaching items free, you discover that other parts of the car are preventing the removal of the air cleaner housing cover so they have to be re-positioned/removed. Changing the air filter is now a 30 to 45 minute task if you are lucky.
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My 2012 Nissan was the same way.
To change it on my new Tacoma, there's a door in the back of the glove box...open it and pull filter out. No tools needed.
Its a 2011 Silverado 2500 HD.
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LVSteve
Member
I see that the cabin air filter is not standard on that model. You can get a retrofit kit from Autozone. Damned sure I would in this city.
Jeff423
US Veteran
I don't know if this is applicable to air filters or not but I sold pressure "sand" filters for industrial applications - wastewater treatment, plating etc. One of the the tecnologies used is depth filtration. This means that the contaminants are captured for some depth within the filter media and not just on the surface. This extended the length of filter runs we could get.
Some of these filters had 7 different types of media in them. The top layer was large and light - anthracite or plastic to catch the large stuff and then it got smaller progressively to catch smaller particles. Then the media got larger because it's purpose was to support the filtration media. The specific gravity of the media was also important because during back washing after the media had expanded and tumbled it had to re-stratify in the proper order. We even used garnet sand because it was denser than silica sand and re-stratified better.
You are correct, see post #11. K&N does use depth filtration.
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