Some Brodak stunt tanks have the engine flow line coming out of the tank below the wedge line.  A friend of mind said that the venturi or engine needs to be lined up with the wedge line and that the flow of fuel to the engine starts at the back of the wedge bend.  I never thought of that.  If this is the case, is it true that the tank's wedge line is what needs to be lined up with the hole in the venturi or, as in the case of a Fox 35,  needs to be about 1/8th of an inch higher than the hole in the the venturi.       If this is so, does then I understand some of my engine problems where I tried to mount these Brodak tanks high to accomodate for the place where the line comes out of the tank.

Sub question - do McCoy 35's also need the tank mounted 1/8 an inch or so above the venturi hole?

My question is specifically for non uniflow tanks.  I have been trying to get a good inverted run from a standard vented tank (I think that's what you call it).   

So, in your experience, you've not gotten good runs out of vented tanks. I have been thinking about switching to uniflow but haven't done so yet, except in the case of clunk tanks.  I have at least two usable ones on hand. Per my other current article about tanks,  I am getting a good run with a Hayes tank and muffler pressure on a Fox 35.  I'm wondering if I can hook these clunk tanks to a motor that has no muffler - ie since there is no muffler pressure.  I have an old Fox 35 and McCoy 19 that I still use.

I am wondering if some are getting very good runs from standard vented tanks.

In a standard tank - is the vent - the fill tube or the overflow tube.  Did you close off the other tube?