Air Cleaner Insights, 914-6 Correct Options

[930cabman]

"sick old Porsche hobbyists"

Well said

[rgalla9146]

....but wait...theres more !
please excuse my gigantic pics I have to do this two at a time.
Nice to see Grady Clay mentioned on this site, I visited his shop almost 50 years ago
while traveling cross country in a '59 sunroof coupe with my brother and sister.
Thats right...three across in a 356. My other sister was in a '69 911 with her future
and current husband.
I digress.
The first two pics show details of the rear of the 6 plastic housing.
Notice the drain hose and the metal tube with rubber weep nipple that attaches
to the tin near the starter.
Also notice the brass T that is plugged on the small side. The large side takes the
cloth brided vent hose from the oil tank.
There is also a small metal tab that I suspect was meant to hold the small fuel hose
that ran across the back of the AF housing.
The hose clamps ar incorrect. But they work.

[rgalla9146]

Denis your inlet snorkel appears to be correct for a 6. Long plastic snorkle without
a metal warm air inlet attached.
With appologies to Clay, 6s had the 3 holes molded as part of the housing.
Notice the view across the 'boat' shows no elevated inner flange

[rgalla9146]

Pic shows the larger clip and attachment to the boat.
And last but not least.
The shell sticker ?
Could be a Euro delivery feature. It's rotated ninty degrees from those seen on
911s It's positioned to be seen properly from the drivers side of a 914 6
Anyone ?
PS I've never had a euro delivery 6

[IronHillRestorations]

I’ve read about a few cases of 6’s getting hydro locked due to rain water getting past the seal and into the buckets.

[gereed75]

Wow, great find on the metal drain tube fitting. I vaguely remember seeing or having one of those but had no idea what it was for. That is some obscure minutiae right there! As is the Shell sticker insight!

I agree the clip on the back was to secure the cold start cross connection hose. See below. Also note on this box the what I think are correct cold start hose clamps. And also the plug in my vent fitting appears to match perfectly with the one Rory shows. Also see the same height walls on the plastic compatible buckets. These buckets work on carbs and the mag stack MFI as shown in the other photo.

The one other piece of obscure minutiae is the inclusion of the “fire screen” in the vent fitting that is pictured below on what I believe is a 911 MFI plastic box. And seems to appear on the six box Rory shows. This screen is not there on my six box? Maybe just missing.

By the way, the six box and this 911 MFI box are identical. Only the snorkels are different. There certainly are 911 plastic boxes with slight variations (indentations on the bottom) but the basic boxes are identical in shape form and ( I suspect) function.


Oh and found the link to this very comprehensive discussion on Early S Registry. https://www.early911sregistry.org/forums/sh...rious-MFI-years

[gereed75]

[gereed75]

Wow we have beat this to death!

[930cabman]

But there's more



Clearance is very tight here, a factory style will never fit here

[mb911]

We need Glenn Stazek to chime in. He would be what I consider to be the absolute expert on this.

[gereed75]

But there's more



Clearance is very tight here, a factory style will never fit here

Ok, had to make me do it. Just measured the distance between the center line of the rear carb throat to the rear most point on a stock plastic airbox in that area. The distance is 2 1/4".

You can measure better the same dimension on your K&N equipped, typical after market filter assembly. I tried quickly on the ones currently on my factory six (without removing the top rain shield, so it is a rough measurement) and I got 2 1/4".

Agree the clearance is close here but - Obviously the factory plastic box fits in this area on a factory car. Metal box, who knows - Dont have one to measure.

So also does a typical K&N assembly fit. The only way either would not fit here on a conversion is if you are using a motor mount that sets the engine further back. I guess some aftermarket motor mounts may be different, but if they were that far off, then the trans mounts would be off too, and I have never heard of that being an issue with any after market mount.

PS... Dont try to install an engine into the car with the passenger side aircleaner mounted, just too close!

[rgalla9146]

K&N rain hats fit on my stock 6 no problem.
On conversion cars ? all bets are off. Too many variables.

[930cabman]

But there's more



Clearance is very tight here, a factory style will never fit here

Are these K&N filters? I picked them up along the way and it appears they will work fine. The filter elements are from PartsKlassik.

[fixer34]

Thank you, is this an original setup as far as you know?

Original as of when I bought the car 47 years ago...
I can get it out into the sunshine (hopefully) this weekend and take whatever pictures you might want.

[DennisV]

....but wait...theres more !
please excuse my gigantic pics I have to do this two at a time.

As always, thanks for taking time to share the photos. Super helpful.

I'm not sure the source of this, but I have a PDF file about 914-6 Fuel System. A drawing in there seems to support the 6 hole configuration.

[DennisV]

Wow we have beat this to death!

Perhaps, but I feel like we're getting to some closure not found consolidated elsewhere. Unfortunately, I can see I will have more questions. Like the spec on the hoses with no part number, and distinguishing pipe, stopper, and valve from 911. (IMG:style_emoticons/default/biggrin.gif)

Because I had a 5 hour plane ride and no Internet access, I took the time to compare the 914-6 and 911 parts catalogs to look for cross-over. There is quite a bit, but only for select 911 models, and not everything. Not sure if this will help anyone else.

A few interesting notes about the air cleaner parts with same numbers in the 911 catalogs:

• 70-71 Zenith calls out "plastic" for the air cleaner main body
• 70-73 Zenith also calls out "plastic" for the connecting piece (aka boat)
• 65-68 base 911 has 2 part numbers for the air cleaner main body, one matches 914-6

65-69 911 Has a different part number for weber connecting piece (aka boat). I would have thought it would be the same as 914-6 given the matching main body part number. 65-69 Weber calls out "steel" for the 911 E/S and T air cleaner main body (different part number).