Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > Restrictors in air intake tubes?

[ben998]

Does anyone know the purpose of the restrictors in the air intake tubes, and the effect of removing them (apart from letting more air in)?
I saw one the other day and its a fairly major restriction, Im planning to remove them unless I hear its a bad idea?

Thanks,
Ben

[DJ Tera]

doesnt noticeably improve power, but throttle response seems A LOT more crisp
And it sounds louder too

[ben998]

It sounds louder with a crisper throttle response... That'll do me..

I wondered if they were primarily some kind of silencer. Not much keeping them when the Termis go on then!

cheers,
Ben

[rcgbob44]

I fitted DP carbon air tubes and a JHP under tank filter system and it definitly feels better than the original tubes.

Fidly to fit but well worth the effort!

[DJ Tera]

i think shazaam was talking about the restrictors being designed to increase airpressure at slower speeds (like putting your finger over the end of a garden hose?) but who rides a 916/998 at slow speeds anyway!!!

[ben998]

I'll take them out this evening, and let you know how many seconds it shaves off the ride to work in the morning

The noise alone should be worth a few tenths

cheers,
Ben

[sps955]

They are fitted to cut down noise from the airbox.
It's all to do with sound waves and resonance.

[Desmondo]

...and just think of the weight saving. Worth at least another 3bhp.

[Nigel Booker]

As far as I was told they are just fitted for noise reduction, but the engine seems to respond better without them and the induction noise is great.

[Yellow Bip]

I have also fitted a JHP under tank air filter and removed rubber restrictors and front mesh on the nose cone and it does sound nice.
And i hope this does not sound stupid but if you start it up and put your ear to the front of the intake and rev it it sounds GREAT!!!!!!!!!