748 trumpets - what size?

bradders · 19-Jan-2012, 23:12

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 · 20-Jan-2012, 06:44

O/D 57mm I/D 50mm

bradders · 20-Jan-2012, 09:50

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

Chaz · 20-Jan-2012, 09:55

Are you not fitting ram stacks Paul?

bradders · 20-Jan-2012, 09:57

er -

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

Chaz · 20-Jan-2012, 10:06

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 · 20-Jan-2012, 11:50

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

bradders · 20-Jan-2012, 12:45

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 · 20-Jan-2012, 12:54

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 · 20-Jan-2012, 13:02

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.

Quote:

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

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20-Jan-2012, 06:44	#2
dunlop0_1 Registered Forum User Big Twin Posts: 1,568 Join Date: May 2009 O/D 57mm I/D 50mm Reply

20-Jan-2012, 09:50	#3
bradders Registered Forum User MotoGP God Bikes: 848, M620 DD bike Posts: 11,913 Join Date: Aug 2003 Location: Hants Mood: waiting... Thanks, so I'm looking for a set which are 57mm Reply

20-Jan-2012, 09:55	#4
Chaz Registered Forum User Ducati Corse Bikes: 916 Strada Posts: 3,844 Join Date: Jul 2003 Location: At some track or another:) Mood: www.od2racing.co.uk Are you not fitting ram stacks Paul? Reply

20-Jan-2012, 09:57	#5
bradders Registered Forum User MotoGP God Bikes: 848, M620 DD bike Posts: 11,913 Join Date: Aug 2003 Location: Hants Mood: waiting... er - I am fitting 748 bell mouths if thats the same thing? Reply

20-Jan-2012, 10:06	#6
Chaz Registered Forum User Ducati Corse Bikes: 916 Strada Posts: 3,844 Join Date: Jul 2003 Location: At some track or another:) Mood: www.od2racing.co.uk 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. Reply

20-Jan-2012, 11:50	#7
Cranker V2 Registered Forum User 500SD Bikes: Class A 620ssie #71 - 853 R/RS Dry - 748sp Wet Posts: 725 Join Date: Nov 2009 Location: Chester Mood: Green with envy Im using 748 velocity stacks Paul, with just a coarse mesh protecter to prevent ingress of sparrows, lumps of brick , kitty litter etc. Reply

20-Jan-2012, 12:45	#8
bradders Registered Forum User MotoGP God Bikes: 848, M620 DD bike Posts: 11,913 Join Date: Aug 2003 Location: Hants Mood: waiting... 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 Reply

20-Jan-2012, 12:54	#9
Chaz Registered Forum User Ducati Corse Bikes: 916 Strada Posts: 3,844 Join Date: Jul 2003 Location: At some track or another:) Mood: www.od2racing.co.uk 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. Reply