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Old 03-10-2012, 05:27 PM   #15
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How heavy is this coach?
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Old 03-12-2012, 01:31 PM   #16
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Quote:
Originally Posted by Fred and Bonnie View Post
Barry, this info is somewhat old, however it gives good comparisons. Owners tend to over oil K&N filters causing additional problems with the MAF.

Best (Worst) Air Filters to Use [Archive] - CadillacOwners

fred
Almost everybody with a sand rail uses K&N type filters. During a holiday weekend, over 10,000 sand vehicles are at the Imperial Sand dunes at Glamis, CA. At night with the lights on, you can see the fine sand hanging in the air.

I can't find the article now, but K&N has said that if a properly oiled K&N filter passes any dirt or dust, it is so fine that it doesn't harm the engine. I can run a black glove down my intake tube and it comes out black with no signs of dirt or dust on it. Some of the engines in these $150,000 toys are twin turbo making over 1,200 HP. Would they be risking their engines on an air filter that didn't work?



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Old 03-12-2012, 01:55 PM   #17
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Quote:
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Would they be risking their engines on an air filter that didn't work?
In a word YES.

They let more air in as well as fine dust. There are numerous tests on the internet that show that.
I was looking to us on of their new ones for MH's & class 8 trucks. They tole me they were 92-99% as effective as the stock one. Even 1% more is double the dust as the stock filter.
I used them on my racing motorcycles, but I rebuilt the engine every season anyway.
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Old 03-13-2012, 08:58 AM   #18
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On the RV I just sold, I put in a K&N filter and I did increase my mpg a little and did notice that it seem to have more power. I have a screaming eagle harley that is fast and I went from 38 mpg to 42 mpg. Just my 2 cents.
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Old 03-13-2012, 09:23 AM   #19
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As far as the K&N filters, it's not the dust that is the problem. It's that some owners over oil the filter after cleaning it, the oil gets to the MAF and causes problems.
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Old 03-13-2012, 09:29 AM   #20
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Quote:
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Some of the engines in these $150,000 toys are twin turbo making over 1,200 HP. Would they be risking their engines on an air filter that didn't work?
I can see performance guys trading short term horsepower gain for long term engine wear, yes. I don't think the point of the K&N system is better filtering. I think the point of K&N is adequate filtering and better airflow.
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Old 05-20-2012, 04:20 PM   #21
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Mearslp,
Do you run your generator when you park? It probably uses gas from the same tank, and that would ruin your average MPG.

Just a thought,
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