3.2 airbox questions

[72T]

The factory airbox has a hole on the backside (facing the backseats), that seems to be open on the wrong side of the air filter. Should I block it off? It looks like maybe it is a hole for a vacuum line?

Also, there are two part numbers for what appears to be the same box: 93011034300 and 93011034301. Anybody know the difference? I'm thinking about getting a new one and don't want to go wrong.

Thanks!

[Porsche 935]

Mine has a hose connected to it leading into the right wheel well area. Possibly for fuel evap.

[911obgyn]

Yes line does go to carbon canniister, for fuel evap, I had to replace mine for California emissions

[adias]

Originally Posted by 911obgyn

Yes line does go to carbon canniister, for fuel evap, I had to replace mine for California emissions

Do you have a photo of the fuel evap and the hose running to the airbox?

How is the hose attached to airbox? Via a grommet?

[Eric H]

No photos handy but it’s connected with what I’d call a “wire clamp”. It’s a circular piece of stiff wire with ends that you can squeeze with a pliers to loosen it.

[DerkPerk]

The air box has a nipple on it that the tubing pushes over and held with said “wire” clamp. I call them Jesus clamps because when they snap, that’s usually my verbal reaction.


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[adias]

Originally Posted by DerkPerk

The air box has a nipple on it that the tubing pushes over and held with said “wire” clamp. I call them Jesus clamps because when they snap, that’s usually my verbal reaction.


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I did not see a nipple on the airbox of my '86 3.2, just a hole at rear side near the bottom in the removable shell of the airbox. Is that the area you are referring to?

[adias]

Originally Posted by 72T

The factory airbox has a hole on the backside (facing the backseats), that seems to be open on the wrong side of the air filter. Should I block it off? It looks like maybe it is a hole for a vacuum line?

Also, there are two part numbers for what appears to be the same box: 93011034300 and 93011034301. Anybody know the difference? I'm thinking about getting a new one and don't want to go wrong.

Thanks!

I also have a hole no nipple in the back of the removable part of my MY86 airbox. Is that the same in your case? Which year is your car?

[adias]

Originally Posted by adias

I also have a hole no nipple in the back of the removable part of my MY86 airbox. Is that the same in your case? Which year is your car?

See photo:

[DerkPerk]

The nipple I was referring to is near the red arrow on the image on the engine side of the filter. That has the hose connected with the Jesus clamp.

The hole with the green arrow is likely to drain any moisture that accumulated and is pre filter so that should not be blocked.





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[sp_cs]

The 88-89 Clubsport had a bung over the nipple - there is a specific part number for this CS part.

Assuming some cars were not optioned with Charcoal canisters.

Strangely, a spare lid I had fitted before I went ITBs didn’t have the nipple at all - the moulding had not been disturbed so assuming a factory item.

[adias]

Originally Posted by DerkPerk

The nipple I was referring to is near the red arrow on the image on the engine side of the filter. That has the hose connected with the Jesus clamp.

The hole with the green arrow is likely to drain any moisture that accumulated and is pre filter so that should not be blocked.





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Thanks!

[sp_cs]

CS bung photo: