BRP Air Box Mod

Post here on any modifications you have done, or have found for the Kawi

Moderator: BRP

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BRP
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BRP Air Box Mod

Postby BRP » Thu Aug 19, 2010 8:52 am

Tools required: 1 and 2" hole saws
Air Box Mod 001.jpg

Drill 1--- 2" hole on each side in the center of the dimple
Air Box Mod 002.jpg

Drill 1---1" hole on each side below
Air Box Mod 003.jpg
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coop
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Re: BRP Air Box Mod

Postby coop » Thu Aug 19, 2010 1:22 pm

i can hear everyones tools turning now lol. let me see what i got in the basement
07 650r: Bruce Fab slip on, Race Tech GVE/Springs, BRP clutch springs, -1 front sprocket, BRP air box mod, Sport Bars 2.0, DIY fender elim. DIY CBR 600rr rearsets
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gr33nninja
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Re: BRP Air Box Mod

Postby gr33nninja » Thu Aug 19, 2010 2:07 pm

any gains on a stock bike< besides noise?
"Nobody who rides a sportbike calls them crotch rockets. It's like a harley rider saying he rides a gay dressed-up pirate machine." GOOSE
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tribulation138
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Re: BRP Air Box Mod

Postby tribulation138 » Thu Aug 19, 2010 2:19 pm

i kinda of did this to my air box.. They all gave me hell on rider forums..
I have to many mods to post here.
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Addohm
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Re: BRP Air Box Mod

Postby Addohm » Thu Aug 19, 2010 4:55 pm

Gary wouldn't do this if there was no positive benefit to it. Look at it this way. You are introducing more & cooler in to your intake box.

P.S. Those tards over on rider forums are...well...tards ;P Most of um anyway.
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BRP
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Re: BRP Air Box Mod

Postby BRP » Fri Aug 20, 2010 10:52 am

tribulation138 wrote:i kinda of did this to my air box.. They all gave me hell on rider forums..
And once I posted, the thread died .
And actually, my engine builder goes even farther with openings.
You can also bore some 1" holes in the inspection cover, and a 2"
on each side. I fell that's too much.
Might make better power, but there's no filtration.


Also, I posted this for you guys.
No reason to go spreading it around.
djrussell
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Re: BRP Air Box Mod

Postby djrussell » Wed Apr 13, 2011 3:14 pm

does anyone else have experience on this? i've got the tank and airbox off to change the plugs and will do this or a variation if it helps. i'll have the snorkels out, stock filter, and an arrow slip-on. no PCIII/V.

thanks! :thumbup:
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tribulation138
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Re: BRP Air Box Mod

Postby tribulation138 » Wed Apr 13, 2011 3:56 pm

i did it and i like it
I have to many mods to post here.
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Mick-e
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Re: BRP Air Box Mod

Postby Mick-e » Mon Apr 18, 2011 7:55 pm

BRP wrote:
tribulation138 wrote:i kinda of did this to my air box.. They all gave me hell on rider forums..
And once I posted, the thread died .
And actually, my engine builder goes even farther with openings.
You can also bore some 1" holes in the inspection cover, and a 2"
on each side. I fell that's too much.
Might make better power, but there's no filtration.
.



Gary that's getting pretty close to having no aribox at all.
Like running wide open with no top to your airbox. Like me.
Funny though with the new engine I'm having built I was considering putting the top back on.
Now maybe not so much.
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Addohm
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Re: BRP Air Box Mod

Postby Addohm » Mon Apr 18, 2011 10:17 pm

There is a lot more he can take off, as he said. I've got mine pretty much trimmed so much it's just an open frame lol.
djrussell
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Re: BRP Air Box Mod

Postby djrussell » Tue Apr 19, 2011 4:11 pm

thanks everyone. i'm going to do it as soon as i get time. any more feedback is welcome.
slaren
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Re: BRP Air Box Mod

Postby slaren » Thu Apr 21, 2011 4:04 am

I have only taking one of the intake snorkels out, it gave me aprox 4 more hp. If bouth snorkels are out, it does'nt give more.
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BRP
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Re: BRP Air Box Mod

Postby BRP » Thu Apr 21, 2011 3:50 pm

slaren, what mods do you have done?
Your results make sense for a stock bike with a slip-on.
Remember the engine is an air pump.
More in, more out. But to get the most out of my mod,
you need to have some compression.
slaren
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Re: BRP Air Box Mod

Postby slaren » Fri Apr 22, 2011 10:04 am

I have only been taking the snorkel out. Got original exhaust setup.

By compression, do you mean different exhaust pipe with narrower opening ?
djrussell
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Re: BRP Air Box Mod

Postby djrussell » Fri Apr 22, 2011 10:51 am

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Addohm
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Re: BRP Air Box Mod

Postby Addohm » Fri Apr 22, 2011 11:16 am

slaren wrote:I have only been taking the snorkel out. Got original exhaust setup.

By compression, do you mean different exhaust pipe with narrower opening ?



You're referring to back pressure, which is not completely unrelated, but most definitely not compression ratio.
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BRP
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Re: BRP Air Box Mod

Postby BRP » Fri Apr 22, 2011 11:36 am

Anything is possible, but 4hp gain by only removing a snorkel
is a little tough to believe. Was air {fans} injected into the airbox
during the dyno runs?
And were several pulls done in a row?
slaren
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Re: BRP Air Box Mod

Postby slaren » Fri Apr 22, 2011 12:06 pm

several runs, wind on and off to keep engine temp down.

I stod long side the dyno at the time.

The dude have nothing to win by trying to fool me. I could go to anyone with a dyno to disprove it.
electjohn
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Re: BRP Air Box Mod

Postby electjohn » Fri Apr 22, 2011 4:15 pm

I took both snorkels out, the only thing I got was more noise :???: :???:
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BRP
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Re: BRP Air Box Mod

Postby BRP » Fri Apr 22, 2011 4:34 pm

Like I said, anything is possible.
The engine is strangled to death to meet emissions.
I have a bone stock 08 that I'm going to have to test this with.
If only the closest functioning dyno was not 40 miles away.
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tribulation138
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Re: BRP Air Box Mod

Postby tribulation138 » Fri Apr 22, 2011 4:44 pm

electjohn wrote:I took both snorkels out, the only thing I got was more noise :???: :???:



thats a good thing
I have to many mods to post here.
vircotto
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Re: BRP Air Box Mod

Postby vircotto » Thu May 19, 2011 3:54 pm

BRP wrote:Like I said, anything is possible.
The engine is strangled to death to meet emissions.
I have a bone stock 08 that I'm going to have to test this with.
If only the closest functioning dyno was not 40 miles away.



I'm interested if you get the same results!
mostholycerebus
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Re: BRP Air Box Mod

Postby mostholycerebus » Fri Jun 17, 2011 3:25 pm

BRP wrote:But to get the most out of my mod,
you need to have some compression.


Is the photographed mod too much air for just a full exhaust, DNA filter, and PCIII? Did you get that testing done on that stock 08? Going into the engine (cam, remove middle gasket) is probably going to be a Winter '12 project.
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kanatuna
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Re: BRP Air Box Mod

Postby kanatuna » Tue Jun 21, 2011 10:51 am

I will give it a shot.
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biketechted
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Re: BRP Air Box Mod

Postby biketechted » Tue Jun 21, 2011 10:56 am

EBAY has plenty of boxes for around $10 in case you screw it up or change your mind.
clashman
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Re: BRP Air Box Mod

Postby clashman » Wed Jul 06, 2011 11:00 pm

I have the snorkels removed and im keen to give this a go but i really dont want to increase the noise level, how much louder would you estimate this makes the intake noise.
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Retro Rocketeer
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Re: BRP Air Box Mod

Postby Retro Rocketeer » Thu Jul 07, 2011 11:46 am

Entirely subjective, but I didn't notice much noise over the snorkle removal. If you have an aftermarket silencer of any sort, you likely won't hear anything different over the noise of the exhaust. Again, entirely subjective. If you use a hole saw, you can always plastic weld the "holes" back in.
Sentinel
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Re: BRP Air Box Mod

Postby Sentinel » Wed Oct 12, 2011 6:37 pm

Would this be a bad idea for a bike that's ridden in the rain?

Would it allow water to enter in?
dsgrntldPW
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Re: BRP Air Box Mod

Postby dsgrntldPW » Sun Dec 25, 2011 11:35 pm

I realize this is an old thread, and that I sold my '06 650r some time ago, but I have a comment and a question. On my current V-Star 1300, since the airbox is out and exposed to the elements, the usual mod is to drill a large number of usually 3/16" or similar sized holes along the front and rear facing portions of the airbox. The theory is that many holes of this diameter will still allow more air in while helping to keep rain/water out, something about the natural cohesive properties of water not easily entering openings of this smaller diameter. While I realize that the 650's airbox is more tucked away, would drilling the many smaller holes do as well as the four large diameter holes in moving air while still doing a better job of keeping moisture out?
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BRP
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Re: BRP Air Box Mod

Postby BRP » Mon Dec 26, 2011 10:17 am

Depends on the way air enters and flows around the airbox.
With my mod, air in being forced into it.
When you just drill random holes, the intake vacuum is drawing the air in.

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