Old style air filter - 2 questions

[montauk]

I bought this old style air filter for my ITB conversion on my SC. I like the look. I noticed that the clips for attaching the top to the bottoms don't line up with the tabs on the top. The clips simply pull down on the flange. Is this correct or do I have miss matched pieces?

Second question - when the weather warms up, I'd like to take it all apart and paint it. Can I gently pry the the clips apart and remove them without damaging them?

Thanks

[rswannabe]

It looks like you have mismatched pieces. The bases you are running look to be for the later plastic airbox judging by the clips that are long enough to clip into the flange. The bases for the metal airboxes have shorter clips to grab the lower tabs on the airbox and not the flange. I hadn’t noticed that the clips are in slightly different locations on the different types of bases. I have some of each and will take a look to see how they compare.

In regards to the clips, yes you can just gently spread them apart to remove them from the bases.

[rswannabe]

Do your bases have the inner lip (the inside edge that retains the rubber sealing gasket) that is lower or raised above the gasket? The bases made to be used with the metal airboxes have the raised inner lip that goes up into the metal airboxes to positively locate them. The bases for the plastic airboxes don’t have the raised inner lip and the plastic airbox sits down into the base to positively locate them.

Here are a set of the less common bases designed to work with the plastic airboxes.



Note how the inside lip is not raised above the rubber gasket.

[montauk]

Thanks Brooke. My bases look like the ones in your photos.

I don't mind using them as is.

Any problems with that?

[montauk]

Brooke,
What's the black extension on your pulley for?
Dave

[rswannabe]

Originally Posted by montauk

Thanks Brooke. My bases look like the ones in your photos.

I don't mind using them as is.

Any problems with that?

No problems using them together as long as they are mating together well. Without the bases locating into the airbox or the airbox locating down into the bases, I imagine you have to be careful they are mated and sealed well when you latch them down.

If you were to swap to a plastic airbox you would pick up about 3/4” more vertical clearance in your engine bay.

Just for the general knowledge base, you can also use the plastic airbox with the bases intended for the metal airboxes with a little modification. You need to swap to the longer latches, which you can still buy new, and modify the airbox by opening up the area above the venturie to accept the metal lip from the bases. This is what I’ve done on my 2.8 that I’m converting to EFI.

[rswannabe]

Originally Posted by montauk

Brooke,
What's the black extension on your pulley for?
Dave

3.6’s have a double pulley setup, and the extension is just the part of the kit that eliminates the second pulley. This is commonly done when swapping the 3.6 to an earlier chassis. That shaft is still the same length with a spacer where the 2nd pulley was.

[montauk]

Thanks. I'll be on the lookout for a plastic air box. It's tight with the metal one.

Where did you drill into the air filter for the air sensor? I think I'll be drilling into the side of the base between cylinders 2 and 3. There isn't enough space to drill in from the bottom.

[rswannabe]

It’s not critical the intake air temp sensor be in the intake tract on an NA 911 motor. It can be anywhere in ambient air. Having said that, I mounted mine into the back side of the airbox where you can’t see it. It’s simple to reach back and unclip/reclip the connector by feel when removing the airbox. A benefit of the plastic airbox is it is thick enough I just drilled a hole and threaded the sensor into it.

[montauk]

Originally Posted by rswannabe

It’s not critical the intake air temp sensor be in the intake tract on an NA 911 motor. It can be anywhere in ambient air. Having said that, I mounted mine into the back side of the airbox where you can’t see it. It’s simple to reach back and unclip/reclip the connector by feel when removing the airbox. A benefit of the plastic airbox is it is thick enough I just drilled a hole and threaded the sensor into it.

Good idea. I'm using a Bosch that mounts with a small bolt so that location should be fine with the metal box.

[montauk]

I sourced a plastic air filter. With the velocity stacks on top of the ITB's, I can't fit the plastic air filter. The opening above each ITB in the plastic housing is too narrow. Is there a narrower velocity stack that works with the PMO ITB's.