No airbox!

Hi. My 2001 RSV Mille R (yellow for speed!) has the standard airbox with a k&n (bung removed) and I run 57mm throttle bodies, snipped wire, std silencer with cone removed etc - all the usual.

Now I have been looking at a hooked air box and its competition and thinking why bother with any airbox or sealing at all.
How about removing the box completely and fitting foam or similar filters directly to the two trumpets on my throttle bodies. I cant see any reason why not and if the main reason to get a hooked is more airflow them this has got to be the ultimate as air can be sucked in from all sides!

Now I know some are going to say you need a certain amount of vacuum in a the box to run right but it must be possible to set her up to run "free breathing" !! My last bike, an XJR 1200 (admittedly card fed) ran far better with no air box and separate filters straight on the carbs (with jetting) and many car tuning filters clamp straight on to the metering head or throttle body with no probs at all.

So the question is this....will it work....and has any one on here tried it???

Your views will be much appreciated.
Dean (aka RSVmilleR)

The base plate on a hooked kit still connects to the air ducts/snorkel so gets air directed to it ....dense cold air...which is ideal...if you do not have a base plate and just filters surely you would get heatsoak fron engine below :dunno not good for power

Fair comment redratbike! But you could still use the base of the airbox if you wanted to utilise the ducts but better still you could make the air feed bigger than the standard (quite small - even derestricted) inlet whole. Perhaps larger bore twin pipes from the front of the bike finishing right near the intake trumpets (and their filters).

Im not trying to say my idea is right - just trying to get some ideas for our bikes by prompting discussion.

The hooked airbox seem a good idea according to most on here that use it. However it only really gives you more airbox volume. This is useful for throttle response but for outright more power you need to burn more fuel for which you need more air. Hence the quite small power gains by people who have dynoed their bikes with hooked boxes.....On the hooked design the standard airbox intake is still used through the bottom of the airbox and the intake trunking is the same (quite small) size and has to bend from horizontal to vertical (twice)to get up through the airbox entry and filter then back down into the throttle bodies. There seems (to me at least) to be a better way of doing it with less restriction and more airflow.

Lets here some more viewpoints!!!!

go for it :devious... my mate done all this years ago but not on a mille ...limited success but it would be interesting...

If you want a bigger air intake boot, get an early one -
http://www.af1racing.com/store/Scripts/prodView.asp?idproduct=754
I got one on my bike with standard airbox & pipercross filter :devious
The hooked air filter allows air to be sucked from around the bottom of the tank aswell, its not sealed.

See my album for a dyno prinout that shows how to lose 30 bhp by stretching a foam filter over the air intake. (100 bhp before, 130 bhp after).

Mark

Thanks for that info re the bigger air box intake. Did not know there were different ones!

On the hooked subject surely you need to get the seal to work around the tank base or you will be sucking unfiltered air into the engine as it would be bypassing the filter....not good.

no no no...hooked airfilter has a large pipercross foam filter over the top of the throttle bodies.......no unfiltered air gets in the engine.....trust me

just do a search for threads relating to open or sealed airboxes...its been done to death so you should have enough info to make up your mine

there are fans for both ...sealed probably gives you more topend...increases the volume of the airbox by sealing against the endge of the tank and no airbox lid.....

hooked def improves low-midrange...see for sale thread for bhp increase as well....oh and i forgot about the induction roar:inlove

Ahh. I see. I thought hooked still filtered on the intake side of the air box (like std). Did not realise the filter was on the TBs!
So basically the hooked design is what I was thinking about anyway. Serves me right for not looking at the pics of the hooked airbox more closely!!!!

End of thread!

RSVMilleR said:

Ahh. I see. I thought hooked still filtered on the intake side of the air box (like std). Did not realise the filter was on the TBs!
So basically the hooked design is what I was thinking about anyway. Serves me right for not looking at the pics of the hooked airbox more closely!!!!

End of thread!

Click to expand...

oh enlightened one you have learnt well:thumbup