I just lucked into a deal on these air horns,

45mm choke, 57mm tall and 87mm wide at the lip. Big lip, I spent a few hours today hunting through sites that sell air filters for air stacks and haven't found anything.

Wondering if the Z collective (love that term, kinda like the borg collective) has any suggestions, foam socks or stainless steel mesh caps?

Worse case, I could have a few mm cut off the lip so a standard filter would fit but would rather not do that if I don't have to.

Thanks,

Chris

Edited November 10, 201311 yr by grannyknot

Some foam and glue and a craft mood will get you these:

btw how do those 45mm horns mate to the SK's opening. Is there a step?

I would have to find the same kind of foam they use for air filters so that sticky oil would work properly, a good option.

There is about a 1mm lip on the barrel sleeve that needs to come off, a couple of seconds with the dremel and some emery paper and almost a perfect match.

The air horn filter thing has been discussed recently on hybridz.

Weber Velocity Stacks Filters or No? - Nissan L6 Forum - HybridZ

Given what the advantages of using air horns do and how that works, ie the improvements in air pattern and flow at the lip of the horn, it seem intuitive to me that using those mesh filters that slip over that critical lip shape can do nothing but remove most if not all of the advantaged gained. Let alone the poor filtering they provide. Do they look cool? Yup.

Jim, good thread there on Hybridz, it's got me leaning away from screens.

Found theses, Clamp-On | Uni Filter might be a little tight.

and, https://www.pegasusautoracing.com/productdetails.asp?RecID=8877 or this and make up my own as Blue suggested.

Have you thought about these - I only take 1 real road trip per year to Tail of the Dragon:

ITG Air Filters - performance air filters for road and race vehicles

Edited November 10, 201311 yr by Travel'n Man

Granny, check out the weber air specific filter that UNI has on the automotive page! Maybe these dont screw with the air patterns into the horn as much

Automotive | Uni Filter

I hope they mean $32 per pair, but I'm afraid not.

Jim, I thought those would work too until I saw the 3.25" is the O.D., there made for 2" wide stacks.

Micthell, I forgot about ITG, they have some very nice stuff. I have sent an inquiry about their JCS 12.

Thanks,

Chris

Chris

This may be the best route to take - I'm thinking seriously about one. I really like my horns showing, and the air flow around them but the micro dust is not very healthy for my engine.

Air Boxes

Here is one with a cheaper price - interesting ducting on the pic as well:

Datsun Z Triple Weber Conversions and F.I. Conversions

Edited November 12, 201311 yr by Travel'n Man

Yeah, I have been looking at those for a while, this is the CAI box I would really like to get,

As far as I can tell these air boxes were made in Japan for their market and NA never got them.

Very slick looking. But in any case I would have to cut down my present air horns so they would fit so I think I'll try and build one out of filter foam first and see how that works before I spent the big money.

Thanks,

Chris

Now here is a good price, Twin Carb Trumpet Sock 40/45 Weber Dellorto Jenvey Pair - Ramair Filters