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Underbody braces, turbos and more!

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PostPosted: Thu Feb 14, 2013 6:20 pm 
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Joined: Mon Dec 31, 2012 12:58 pm
Posts: 85
Location: Millsap, TX
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.

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'91 Metro 3 cyl. 'vert. 5 speed beater, built as a fun daily driver.
'92 Metro 3 cyl. 'vert. Auto, all factory clean.
'92 Metro 3 cyl. 'vert. 5 speed beater back up.
'91 'vert with factory 160 hp 13B two rotor, Very clean RX-7.


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PostPosted: Fri Feb 15, 2013 1:05 am 
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Joined: Sun Aug 03, 2008 7:47 am
Posts: 149
Location: WA
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.


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PostPosted: Fri Feb 15, 2013 1:19 am 
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Joined: Fri Feb 13, 2009 7:10 pm
Posts: 880
Location: Vancouver, WA
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

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98 swift 1.6 16v swap
03 cobra bolt ons
97 3000gt vr4 e85, high comp, bolt ons
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PostPosted: Fri Feb 15, 2013 2:17 am 
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Joined: Wed Aug 09, 2006 6:37 pm
Posts: 784
Location: Palmdale, Ca
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.

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1987 Chevrolet Sprint Turbo under construction


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PostPosted: Mon Apr 01, 2013 9:01 pm 
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Joined: Mon Aug 10, 2009 9:02 pm
Posts: 16
Location: camano Island, Washington
K&N filters are not real filters. they will keep the gravel out, that's about it..


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PostPosted: Mon Apr 01, 2013 10:31 pm 
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Joined: Fri Feb 13, 2009 7:10 pm
Posts: 880
Location: Vancouver, WA
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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98 swift 1.6 16v swap
03 cobra bolt ons
97 3000gt vr4 e85, high comp, bolt ons
too many others to list


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