BC AIRBOX REMOVAL-really!

My 2Cents for what it's worth:

Sure hope the BC Airbox Removal Kit is a whole lot cheaper than the NB NARK--otherwise, why would you buy one without instructions and use the other vendor's instructions? The NARK may not be the best kit available; however, it is a good kit with good instructions AND good vendor support.

Don't believe everything BC's "used car salesman, Sean" tells you. You should get a noticeable hp increase; however, the numbers can vary from bike to bike AND the TORS may still be too restrictive to get the most hp increase out of your bike. My guess would be that if you size the jets & needles correctly on a dyno with EGA, you should be looking in the neighborhood of 64 RWHp on a conservative dyno. Remember, all dynos do not read the same.

Your airbox removal method: :-D :-D :-D Hope you have a good vacuum. I took mine out the old fashioned way--in one piece, and loaned it to someone who planned to modify the airbox for the K&N cone filters...should be a little easier to do on the workbench--not to mention a whole lot less messy for the bike. :-D

Larry

I'll try my best to answer some of your recent questions:

GleaminTwin,
You have a Scrambler which is an 865cc 270 degree twin. The airbox mod for the other 270 degree twins (and I assume for the Scrambler) from Newbonneville.com is called the FREAK. I know little about 270 degree twin's response to airbox removal; however, I would suspect it would be similar to the 865cc 360 degree twins which to my understanding is not quite as beneficial as for the 790cc 360 degree twins.

For slow speed riding, you would be wasting your money and time doing this mod, IMHO. The hp increase on my 790 is mostly above 6000 rpm which is well above 80 mph in 5th. For the individual cone filters to let more air into the engine, they would have to do less filtering than the stock filter, IMO. The greatest restriction to the stock air intake setup is not the stock air filter, IMO--it's the restrictor plate in the airbox that restricts how much air can get through the airbox--again I'm not sure if the restrictor plate is removable for the 270 degree twins. The restrictor plate can be removed from the 360 degree twin airboxes by removing the right side of the airbox and simply pulling it out, and then resealing and replacing the right side of the airbox--there have been past threads on this with very good pics...Ridge's pics come to my mind first.

Intake noise: Ever hear a V8 auto engine with a 4-barrel carb without an airfilter? That's about what it sounds like--just not as loud--but it seems as loud because it's right between your legs. :-D Some do not like the sound--others like it...I'm one of the latter. The sound begins around 5K rpm when the throttle is wide open. The sound is often described as a "honk" sound. It is loud enough to mute my music on my Starcom 1 motorcycle communications system--which means the microphone inside my helmet is picking up a pretty loud volume of sound. :-D You would never hear this intake sound under "normal" (whatever that is) riding conditions, IMO. In other words, if you shift below 5K rpm and cruise under 90 mph, you will never hear the intake "honk". It "honks" when the throttle is wide open with the rpms above 5K. I cruise a lot at 5500 rpm and I never hear the intake because the throttle is far from wide open.

Larry

[ This message was edited by: RedBird on 2006-11-06 19:59 ]