Fast four air cleaner/ spark arrestor

[RichBad]

Hi,

Silly question (in the scheme of things) but does anyone know the correct orientation of the air filter?  I’ve seen both below examples in photos of others - I want to get it right so I can make/position the throttle rod correctly.

Filter opening rearwards - seems to look correct like this but not sure if the filtering action (from the swirl) would work correctly?

Filter opening facing down - not so neat but the ‘swirl’ should work better allowing any debris to fall out of the bottom?

[robert b]

Richard the air cleaner mounted in up right is the way i have seen on many cars through the years , when I got the first car 40 odd years ago it was mounted that way ,so i guess its up to what you like . Aust adds from the 20s show up right . Bob

Edited October 23, 2018 by robert b (see edit history)

[RichBad]

46 minutes ago, robert b said:

Richard the air cleaner mounted in up right is the way i have seen on many cars through the years , when I got the first car 40 odd years ago it was mounted that way ,so i guess its up to what you like . Aust adds from the 20s show up right . Bob

Thanks Bob, by upright that’s the second photo?

[robert b]

Yes .

[moose50]

This is what I did for my fast four.