Can I add an AC vent?

[justesen]

Here is a picture from "seat level on the drivers side" in my 77 911 of the "HVAC Box" on the firewall.



Can I drill a 2 1/2" hole in the air box without damaging anything inside? I'll then run an AC hose to a vent that will be mounted on top of the console. This is a "home made" attempt to get better air flow than provided by the stock vent system.

Thanks,

Jay
77 911S

[no substitute]

I recall something about an oversize vent that might do the same thing. Maybe someone can recall the details.

[Paulporsche]

I think that will work.

BTW what is that seam? Was this area modded by you or a PO?

Let us know how it works out.

[justesen]

Paul,

As far as I know, the seam is "stock". I'm the second owner and the original owner had nothing done to the car. It only has about 37,000 miles on it.

Jay

[david914]

Try this...http://www.scottsind.com/Navigation/PartsForSale/PartsForSale.htm

[Paulporsche]

Jay,

I have the bulkhead vent that David shows in his link. It goes in that area. It came w/ the car so I don't know what it costs. It works fine. You may get away w/ your low cost variation just fine. You just won't have the directability of the vent.

[justesen]

Paul,

Does the vent mount right on the "air box" under the dash? Do you have a picture?

Thanks,

Jay

[Paulporsche]

Jay,

I don't have a pic, but the vent sits on the face of the box, just below the seam. I just noticed I have one too. When looking at it from the seat, the centerline of the vent is about 1/2" to the left of the right edge of the console.

[justesen]

Thanks Paul. I've ordered a vent that should screw right to the box as long as I cut the holes correctly!

Regards,

Jay