What do I do?
We have a 2004 CBR 1000RR with Akrapovic and Power Commander. I am told that the K&N will make absolutly no difference from two different dealers, except perhaps change the sound.
Does anyone have an opinion on this. Did I waste my money already mapping this with the factory filter?
jg
GONECRAZY
12/12/2005 8:34:39 PM
keep your factory filter...i have seen dynos where the k&n dropped in power
I have heard that as well, yet everyone is always talking K&N. How does the increase air flow drop the power I wonder?
05Tribal
12/12/2005 10:43:23 PM
I keep hearing changing the filter does nothing but change sound. I am going to for go the filter "upgrade" and I am the first to admit I like to mod my bike. Other then my dark Puig screen and flush mount signals all my mods are for performance reasons and I am staying stock.
1000RR
1/5/2006 12:19:56 AM
I've heard that K&N's make no difference on this bike, and have lost of some in the past (RC51 etc).
I have seen 2 different dyno's on 2 different 1000RR's with the BMC RACE filters, and they GAINED
almost exactly 2.00hp - Also, the BMC's are about a pound lighter then stock. The BMC's are a good
mod, but I suggest only replacing them on track bikes, or when your OEM is dirty/used up.
Anubis
1/5/2006 5:01:27 AM
A Race Filter is for just that.... Race. It will allow alot more air through but also alot more crap since it was never designed for the Street.
decannon04
1/5/2006 11:13:03 AM
I think since some of us rode dirtbikes and atv's. Changing the air filter makes a big difference. People think this is the same for streetbikes. It isn't. Stay stock.
1000RR
1/9/2006 12:01:24 AM
I just couldn't stay stock, but I went for the 4-layer BMC Street's over the 2-Layer BMC Race.
Havn't dyno'd, but it does sound a little different.
Saw no difference @ The drag strip either.
Stay stock. Best bang for the buck.
TURBOCBR1000RR
3/18/2006 3:52:18 PM
I WENT K&N DID NOT NOTICE ANY LOOSE OR GAIN. DOES SOUND DIFFERENT.
Whippet Goode
3/20/2006 1:48:45 AM
I got 2 bhp from BMC on my 1000RR. And yes, they are 1 lb lighter than OEM. Their opening at the mouth of the filter is approx 25-30% greater, as Honda closed in the mouth area & added a spout (like on a pitcher) to the opening. This is purely to pass EPA noise regulations.
Also, the BMC is washable (can also be oiled), so long as you're not a lazy git you can maintain filter media cleanliness. If you go with BMC, be sure to do the flapper mod too for best results.
K&N will lose 2-3 bhp over stock.
Cheers
Muz
3/23/2006 10:23:19 PM
brake horse power which is power at the wheels
jbt1124
3/25/2006 2:41:31 PM
everyone is right, stay stock the k&n air filter does resrtict more than stock, the only nice thing about it is that you can clean the k&n yourself.
Lord Duckhunter
4/4/2006 4:05:13 PM
It's been tested & documented that the BMC's do actually increase hp on the 1000RR while the K&N's have caused some problems
It is also a very well known fact that the K&N's have routinely caused a loss of performance on MANY sportbikes especially the Honda's
Another article I wrote on the effects of high flow filters
http://www.rc51.org/airfilt.htm
