Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > 748 trumpets - what size?

[dunlop0_1]

O/D 57mm I/D 50mm

[bradders]

Thanks, so I'm looking for a set which are 57mm

[Chaz]

Are you not fitting ram stacks Paul?

[bradders]

er - I am fitting 748 bell mouths if thats the same thing?

[Chaz]

That's what I ment, you will need to be carful not to spoil the effect of the stacks with the filters, it's really something you should setup on the dyno as it will have a huge effect on the fuelling.

[Cranker V2]

Im using 748 velocity stacks Paul, with just a coarse mesh protecter to prevent ingress of sparrows, lumps of brick , kitty litter etc.

[bradders]

lots (incl engine builder) have warned me against mesh or no filters as too much fine debris will mean engine rebuild come mid season. I was going to use bodywork mesh originally