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K&N Air Filter? Real world HP/Torque increase?
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Author:  Go Kart'er [ Thu Feb 14, 2013 6:20 pm ]
Post subject:  K&N Air Filter? Real world HP/Torque increase?

For my '92 Metro 'vert 1.0 Auto, I'd like to add a K&N air filter. On ebay, most of the ads 'claim' 1-5 HP increase. Is this hype, or does anyone have any real world numbers to prove it. I'd pay $50 for an easy Horse and perhaps one more mpg. It has an Xfi re-grind cam waiting for surgery.
I mostly want to keep it close to stock, yet increase Volumetric Efficiency/HP.
Do they work as advertised?
I don't want to put on a cone set up, as I plan on keeping it factory looking. Although a 2" manifold back exhaust will be next.

Author:  98chevymetro [ Fri Feb 15, 2013 1:05 am ]
Post subject:  Re: K&N Air Filter? Real world HP/Torque increase?

Total waste of money. Spend $50 on a tuneup or something. It won't get you any hp gains whatsoever. Its a downgrade. Nothing more than modern snake oil. Or maybe a nice new lightweight battery relocated to clean up the engine bay and make working under the hood easier.

Author:  VR4 [ Fri Feb 15, 2013 1:19 am ]
Post subject:  Re: K&N Air Filter? Real world HP/Torque increase?

98chevymetro wrote:
Total waste of money. Spend $50 on a tuneup or something. It won't get you any hp gains whatsoever. Its a downgrade. Nothing more than modern snake oil. Or maybe a nice new lightweight battery relocated to clean up the engine bay and make working under the hood easier.



This x infinity

Author:  1987TurboSprint [ Fri Feb 15, 2013 2:17 am ]
Post subject:  Re: K&N Air Filter? Real world HP/Torque increase?

It depends. Some oem air filters are more restrictive than others. I'm not sure if the stock Metro one is or not. It might give a half an hp. But even if it was 2 or 3hp, you wouldn't feel it. And it wont make any difference mpg wise. My Cadillac's stock air filter is said to be just as good as the K&N filter. I put a K&N filter on it anyways because they're cleanable. I like to clean and re-oil mine every oil change. Now if you were to put a carb hat, aluminum tubing, and a K&N filter you might see a gain but it would still be a small gain.

Author:  greggholmes [ Mon Apr 01, 2013 9:01 pm ]
Post subject:  Re: K&N Air Filter? Real world HP/Torque increase?

K&N filters are not real filters. they will keep the gravel out, that's about it..

Author:  VR4 [ Mon Apr 01, 2013 10:31 pm ]
Post subject:  Re: K&N Air Filter? Real world HP/Torque increase?

greggholmes wrote:
K&N filters are not real filters. they will keep the gravel out, that's about it..

Yup. Take a look at the compressor blades on turbo that's run one of them for a while. The leading edges are all chewed up.

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