Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > no air box

[bally71]

ran my 800 for a year in minitwins with no filter

back to back dyno runs showed a 4 - 5 horse increase all through the curve without one

had a good classics set up in the w100 club .. always liked the look and sound of the open carbs

admitedly i'd be a little nervous just having the throttle bodies open to the atmosphere at least the airbox affords some protection

[skidlids]

Originally Posted by bally71

ran my 800 for a year in minitwins with no filter
back to back dyno runs showed a 4 - 5 horse increase all through the curve without one

Did you have different maps done for both, or was it a case of adding the filter richened the mixture and lost 4 - 5 bhp

[bally71]

had a custom map for both

[yorkie]

I fitted some of these to my 900ss engined Monster:

http://www.unifilter.com/online%20ca...universal.html

Got a nice induction roar as a pro!!

Yorkie

[bally71]

Originally Posted by yorkie

I fitted some of these to my 900ss engined Monster:

http://www.unifilter.com/online%20ca...universal.html

Got a nice induction roar as a pro!!

Yorkie

looks just the ticket

hmmmm ... what about a couple of small air scoops with an in line filter?

[skidlids]

I think AK tried ram air several years ago without any real success.
As my 620 uses the same size airbox, throttle bodies and injectors as my 1000SS I doubt there is much that is holding back the performance once the airbox lid is opened up.

As Andy Pike says a Plenum chamber is one of the best ways to go so as to create a large reservoir of still air for the engine to be able to draw on, so long as that air can be replaced as quickly if not quicker than the engine uses it then it should be able provide the desired air/fuel ratio through out the rev range and not be effected by speed

[bally71]

ah but it's not just performance kev .. it's the joy of creating something different .. and something you can blame when your slower than everyone else