Since the Fiero uses a computer to calculate air density based on speed (or whatnot) then does the improved airflow of a K&N air filter do anything to improve performance in Fieros? Perhaps the the only benefit of a K&N in a Fiero is that it is reuseable after cleaning.

I also have a Holley Scoop for looks, I am thinking that these do nothing to improve the iron Duke's perfomance (in my 87 SE)...

What thinks you guys and gals?

kv

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Yes, but not alone. Anytime you can have more air going through a motor, the more power you will have.
A engine is Oxygen pump, the more air you can *pump* the better.

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1987 GT
Many Mods Comming Soon
(need more money)

FieroGTR@Excite.com

Someone on the forum put a car on the dyno and did some testing, showed no improvement. Might want to do a search for the specifics.

I use it because I have a turbo, need more air. Its also waterproof and wont rust out the filter canister. Also a neat decal came with it to put on my Lumina R van, lol.

quote Originally posted by rogergarrison: I use it because I have a turbo, need more air. Its also waterproof and wont rust out the filter canister. Also a neat decal came with it to put on my Lumina R van, lol.

I'm down with that, when shopping for parts I always try to find the parts that come with the best decals and stickers! LOL It's like the prize in the bottom of the cereal box! LMAO

If you improve your intake, to get any performance gains, you will also have to improve your exhaust. The best part about a K&N filter is that you will never need to buy another air filter.

quote Originally posted by avengador1: If you improve your intake, to get any performance gains, you will also have to improve your exhaust. The best part about a K&N filter is that you will never need to buy another air filter.

Amen

"Do K & N filters add horsepower to a fiero? NO! Are they worth buying? They last longer with cleaning/charging and therefore they may be more economical, so maybe they are.
A quote from Herb Adams:

"In searching for more power, my race crew tested the Fiero V6 engine on the
dyno without the stock air cleaner and inlet system, and we were surprised
to find that this produced no change in power. Apparently, the Pontiac
engineers did a good job on these parts because they work well, even though
they look restrictive."

If removing the stock filter has no effect on performance, then no air filter on the market will increase performance. Period..

Mike "

taken from https://www.fiero.nl/forum/Archives/Archive-000001/HTML/20000503-2-000648.html

K&N claims to make more power... prove it. They've tested a few motors at best...

I doubt they tested either "Fiero" filter in any significant way. I would not be surprised if there is no testing at all on these motors.

K&N claims to move more air... It has also been shown they may also allow more dirt. As many know, Diesel engines move huge amounts of air. K&N has been known to increase wear in the top of these motors. (I'm looking for the source of that. I lost the link. Sorry.) I doubt that gas motors are showing any less wear but no-one has bothered to look at the issue.

K&N is a very open filter. The thin oil gause material only stops what trash contacts the oil. The holes in the K&N media are visibaly very large... considerable amounts of crap will fit thru those holes without contacting the oil.

I'll stay with traditional throw away filters or Amsoil oiled foam filters.

Oiled foam is increadibly effective. Almost anyone with a Briggs & Stratton powered lawn mower can tell you how much crap oiled foam will trap and still allow plenty of air into the engine. Amsoil's car filters use the same setup.

In short.... I'll take whatever performance loss "paper" and Amsoil filters may cause in return for greater engine life.

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11-Sept-01, The day the world as we knew it ended.

Over the course of a few years and a couple K&Ns, I think that K&N filters are seldom worth the extra money.

We've decided that they don't flow any better, so you're not going to get any horsepower by installing it.

Their other benefit is that they're re-usable. Let's examine this.

A K&N filter for a V6 costs about $33. The re-oiling kit is another $10 or $15. You now have a re-usable air filter that cost you $45.

A regular paper air filter costs $5 - $8, depending on brand. Let's call it $6.50.

You'd have to change the air filter 7 times for the K&N to pay for itself. In a street car that's realistically 140k - 210k miles. If you think you're going to be driving this car for another 140k miles and you change air filters religiously every 20k miles then a K&N will eventually save you some money.

I race in dirt and need to clean the filter before every race and sometimes halfway through a race. A K&N filter will pay off quickly for me on the race car. On the street cars I just run a paper filter.

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Doug Chase
'88 Fiero Formula 5-spd (autocrosser)
'88 Fiero GT 5-spd (daily driver)
'85 Fiero GT 5-spd (rally car)

WELL BOY N GIRLS!!--HUGE ADVANTEGE OF K N FILTER IS THAT IT SOUNDS SWEEEET!!!!

I CANT AGREE THAT IT DOES NOT PRODUCE EVEN 5%BETTER PERFORMANCE....AS LONG AS YOU HAVE RIGHT MANIFOLDS,AND ENGINE IS TUNED RIGHT IT REALLY SHOULD PUSH MORE AIR IN ...

IT WAS TESTED IN MY MAZDA MIATA ON DYNO
IN 1996...THAT K N FILTER HELPS CAR TO '''SUCK''' MORE AIR

WELL im not sure if it does that to fiero...

i wish i could go back to my friend and test it on him professional dyno at his store(minnam racing in richmond bc)but they closed down in 2000....

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VancouverFiero

vancouver, bc , Canada
1986 red 2.8l,pw,custom cam, cold intake k&n,imso wing,gt kit,fog/lights
SOON TO COME: new roof lining, non pop up headlights, sub, grills!

For people doing certain engine swaps, an advantage
for the open style K&N is its greater compactness.
A disadvantage here in California is that it's not smog legal - The CARB bureaucrats mandate the stock filter in the stock enclosure.

Orville