I just installed a K&N air filter and I am not sure is I am really getting any pick up or any other performance out of it. Just wondering if K&N really is just for quality or does it really give performnace, if so, how does it affect the performance. Also the Bosch Platinum plugs +4, are these any good as compared to the regular ones. It says it increases performance, but my roommates 89 Camaro RS had no change at all after changing the plugs. Some other people have told me, it only gives a good gas mileage by very very low number,Is this true????

 

Depends on what you mean by "performance". If you mean, "Will I get 10 hp from putting these plugs on?" No. All you'll get is a cleaner spark and a longer lasting plug than normal.

As for the filter.. Yes, you can expect around 5, maybe 10 hp boost from a K&N filter. Why? It allows the car to breathe easier. It allows more air to flow through while performing the same amount of filtering as any other high quality filter. K&N filters are second best to running an open intake, which you DO NOT want to do. Also, K&N filters can be cleaned, instead of buying a new one. So don't fret at the price tag because it'll last.

Also, you're not going to "feel" any difference from adding on a K&N filter. They're not the magic trick to getting low #'s at the track.

 

Yeah you will not feall any gain in performance, because all the gains are above 5000rpm. The good thing about the K&N is it lasts for ever and is reusable.

 

The bad thing about K&N is that it lets through as much small particle dirt as a paper filter. If you want improved flow and improved filtration, go with an oiled open-cell foam filter.

 

If you oil your K&N like you're supposed to it will trap much more than an open cell foam filter, just look at the size of the pores in the foam filter.

The biggest advantage of the K&N filters is the $$ you'll save not having to replace 2 filters twice a year.
When the TPI was first introduced the only place to get filters for the first couple of years was the dealer...for $20 each. K&N's made great sense back then for sure.

 

You are not understanding the principle. Oiled gauze is a "surface" filter, meaning it traps the dirt on the surface and has to have holes in it to allow air to pass through. Oiled open cell foam are "depth" type filters, meaning the dirt is trapped within the media. The air goes around the bends of the cells, while the dirt keeps going in a straight line and gets trapped.

The net effect is that open cell will flow as much as oiled guaze, but will trap smaller particles. The K&N does do a better job of filtering for the flow allowed than paper, but doesn't stop any smaller particles than paper. If you don't mind having .002" particles going through your engine, then you don't need to concern yourself with this issue.

 

The K&N filter is a good product, much better than paper. will it turn your car into a fire breathing monster ?? no. As far as the spark plugs go..It boils down to personal preference..I run the AC/DELCO rapid fire plugs and they work great. I would imagine you would have similar results with the bosch stuff. Now when you get into some seroius mods.. say n20 or a turbo/blower then you might need to use a certain type sparkplug. Later

 

No, hp-wise a K&N won't add anything. It is just a lifetime filter, though you must service them every 30,000 miles or so.

The K&N gear that does free up hp is the FIPK packages, where they have redesigned the entire air filter assembly for an LS1 fuel injected engine, to take the nasty obstructions out of the inside of the funnels.

Car Craft and Hot Rod both did dyno tests on all the aftermarket air filters last year and found absolutely NOTHING gained from K&N or any other manufacturer.

NEVER, never, never use any type of platinum plug with a nitrous system--them make a nasty reaction. But for everyday performance, a platinum plug should last for a couple of years, at least (nice if you have headers), and because it burns very hot it should not foul on you.