Thermoquad idling issues

Bewy said
TQs will whistle under some conditions & is quite normal.

With THAT cam in a 340, you are going to need at least 30* of idle timing. It is futile trying to tune the idle cct UNTIL the engine has the correct idle timing.
To get the correct idle timing, you do this 5 min test [ vac adv disconnected ]: engine warmed up, idling [ in gear if auto ], turn dist slowly to advance timing. Idle rpm WILL increase. Once you have the highest rpm, check what the timing is. If it is 32* [ as an example ], then that is what it needs for best idle quality & HIGHEST VACUUM. Use vac adv connected to manifold vac to add the additional timing. You will need an adj VA unit with Allen key fully CW. You may need to fabricate a stop to limit the total amount of VA added.

This is not a Holley [ or clone ], so you don't need a gasket kit if you are careful.

Mixture screws 4 turns out + closing the choke to get the engine to idle means the idle cct is lean.....or you have an air leak. Wouldn't worry about the length of the mixture screws as long as they make a difference when you turn them.

View attachment 1716181502

After I got the carb adjusted to run 850-900 rpm at idle and about 4 turns out in the mixture screws, I pulled it to look at the transfer slot. (Very very rich idle, and wanting to stall when starting in first and reverse. This is a stick car with 3.55s)

The transfer slot is barely visible. Probably just a square. I noticed when I was unbolting the carb that on the pass front of the carb, under the vase it was wet with fuel and a small puddle had formed on the intake. Same for the drivers rear of the carb.
When I pulled it off the base of the carb was wet and there was pooling in the intake. I may have bumped the squirters when I was unhooking the linkage, but this amount of fuel seemed excessive.
All the shafts feel tight, wouldn’t think a primary shaft is leaking fuel, it was wet below it in the passenger side.
After the car sits for ten minutes, it’s kind of hard to start. Have to pump or open the throttle for it to fire up. Before it starts it kind of wants to kick back on the starter like there is too much timing. I verified 20 deg at idle

This must be my rich condition. The carb ran quite well when rolling into the throttle from about 2,000 rpm in third. It just spun the tires when the secondaries opened. The road was wet, so couldn’t test too much.