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

[bradders]

I want to get some pod filters top drop over the ones being fitted to my TBs but dont know what size diameter is needed. Thinking about something like this

http://www.ebay.co.uk/itm/RAMAIR-Mot...#ht_1670wt_853

its only for racing so looks unimportant - just protect the engine

[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

[Chaz]

It's only top end though, its all a trade off, if you fit restrictive filters you may as well keep the air box IMHO.

[Cranker V2]

Thats all I will be using, same as on 853r. No filters but knowing wear will be increased and potential for sucking in debris in an off.

Originally Posted by 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