School me on Venturi horns

[c170b53]

I’ve got two at home I can measure off my plane. Likely original, ( one has a old data plate on it) , I’ll measure , if it fits its yours.

[Bruce Fenstermacher]

Well shoot, I got my hands on a venturi, but it’s 1.5” square mounting holes don’t match my existing 1.5”x2.0” holes (currently filled with rivets).

Him, interesting the one you got your hands on is different. They, the original, and even the new "super" versions, are made to an AN standard (different between standard and "super") but my experience has been and I believed, all the mounting holes the same. You shouldn't have any trouble coming ups with tubes that fit. I think half of us have a collection of them.

[4583C]

I went to check the two that came off 83C and was surprised to find one is 1.5”x1.5” and the other 1.5” x 2”.

[GAHorn]

I went to check the two that came off 83C and was surprised to find one is 1.5”x1.5” and the other 1.5” x 2”.

Well…we all knew YOU were weird.

When I replaced my OEM (original) with “Super” venturiis…. they were a perfect-fit replacement.

[ghostflyer]

I originally had 2 6in venturies and one 4 in venturi . The 2 6in ones were plumbed in parallel and provided heaps of vacumn. The 4 in was for the HSI which required 2 sources of vacumn . BUT , the 4 in also provided a high pitch whistle that could be heard from the ground especially on landing . Many a person asked if I had an exhaust gasket issue .
Plus it had a tendency of moving wild life off the runway as you were landing . Yes it was noticeable from the cockpit when in flight but never worried me ..
It could be heard under power on the ground but anything over 40 kts it really screamed . Some “larks” on the airport called my aircraft ‘the american stuka’ .

[mmcmillan2]

I went to check the two that came off 83C and was surprised to find one is 1.5”x1.5” and the other 1.5” x 2”.

Yea, I’m surprised mine is different. A local mechanic is going to look through his pile of spares and see if he can help. He may also have another pulley but I’m not sure I want to stick with that design. I’m lucky that pulley half ejected downs instead of up into the windshield.