K&N air box mod

[toy4fun]

I've read a bunch on here and now I'm just drunk enough to start posting.

I saw the post on the frogzskins air box mod and I liked it and didn't like it all at the same time. They claim to be water proof but I would like to know if it was tested in a negative pressured environment? Sure water may drip off at atmospheric pressure but what if the engine is at 12,000rpm? To me ice cold water going into an angry engine would make it really pissed off. And Glenn at Yamaha dealer said frogzskins crack in the cold.

I love the idea about introducing colder air into the engine all of that makes sense. Epically if you think about when the cold dense air hits the hot intake valve and starts to expand and gets shut inside the cylinder. All that "volumetric efficiency" crap. But the risk of a fine water droplet or small snow inside the engine scares me. especially because its an engineering marvel being able to do what it does.

So I was thinking how can one introduce ice cold air with no risk of it going into the engine?

STOCK I stuffed enough snow in my engine bay to melt and suck in water. as well as push out my tie rod boots.

What if one were able to suck in cold air and keep snow cold? Snow is water but in its frozen state the molecule's are bigger than water (like a dust) and should be stopped by a air filter. So I thought a K&N would be the way to go. As long as you keep it below freezing it should stay out of the filter, Right?

So I did some measuring and research and found two K&N filters PN# RU-0600

I ordered them and they fit wonderfully OVER the stock intake pipe and hopefully will stop snow (and water) from entering the engine. There is a Prefilter for this exact filter but what we need is a Dryfilter to repel snow (and water). The Dryfilter that measures 4.5X4" but that's one inch wider than the filter (3.5x4").

I ordered the prefilter... which is NOT treated with silicone and will NOT repel water. Then I ordered a can of silicone lube spray... and it didn't work. Sprinkling my hand with water through the Prefilter got my hand wet...

I have pictures of everything but I seem unable to put them up in my state.(it looks like they are too big)
ALSO it was undetermined if I needed to adjust my air fuel ratio. Glenn from the Yamaha dealer said I would be drawing in too much air and would spit and backfire but from reading the posts I couldn't tell weather I would need to adjust my A/F ratio or not. My setup is stock and untested as of right now. I will be going out tomorrow morning.

Let the flaming begin

 

[Pockets]

i used outwears velocity stack covers on mine, your idea looks just as well if not better.

 

[toy4fun]

Nice. Yours you can still use the factory air filter. Mine you cant

 

[canoehead]

Is there any performance gain with either ?

 

[Pockets]

mine no, just keeps moisture and particles from getting into throttle bodies. was a added security worth 13 bucks lol

 

[Srxspec]

I have but a bigger k&n filter in the stock air box and then cut the bottom of the air box out with good results.

 

[Weapon X]

I'd like to see a pic of that....

 

[Jeffz]

I have but a bigger k&n filter in the stock air box and then cut the bottom of the air box out with good results.

I bet that sounds crazy!

 

[MikeWalters]

Is there any performance gain with either ?

ANYTHING you do to reduce airbox restriction WILL increase horsepower. Dynotech Research confirmed this years ago, remove the airbox lid and it was an instant 4hp. So yes, performance gain is a given!

That being said I have Ulmers airbox mod, personally I didnt want the airbox with holes on the outside, just a preference for looks.

 

[MikeWalters]

Glenn from the Yamaha dealer said I would be drawing in too much air and would spit and backfire but from reading the posts I couldn't tell weather I would need to adjust my A/F ratio or not. My setup is stock and untested as of right now.

NO you wont spit or backfire, if you have LOTS of extra airflow, you will be a little lean at WOT. But 95% of guys who do airbox mods dont get the fuel programmer and have not had issues. A member here did an airbox mod then did some WOT runs and pulled his plugs, there were perfect colour.

Hope that helps. PS cool idea on the K&N's

 

[canoehead]

I've actually read that sometimes less restriction equates to less ponies. I think Dave or Shadow could chime in on that.