Thermoquad mods that work.

A few comments first on the earlier thread on the forum by Brook James:
- there is no need for additional atmospheric vents on a TQ. It has 3 already. A 1050 Dominator gets by with two 5/16" vent tubes.
- enlarging n/seats. Going too large [ or just larger ] does 2 things: it raises the fuel level & also makes it more difficult to maintain a steady fuel level. The TQ has HUGE f/bowl capacity, which is probably why Carter used the small 093 n/seats....to maintain good fuel control. 101 n/seats would cover just about any situation that uses pump fuel [ as against E85/Methanol ]. If using the larger 101 n/seats, the float level setting needs to be changed from stock. If using Nit floats & stock setting is 29/32", then change to 1" [ 3/32" lower ]; this is with 6 psi fuel pressure.

- I think there is little to be gained by removing the choke housing. Very few engines will use the 800+ cfm that the TQ can flow, despite the wishful thinking of some. Removing the choke blade, linkages & the shaft across the air valve blade is worth doing because they interfere with the air flow.
- holes in the t/blades. These have nothing to do with idle air bleeds. They are there to add bypass air [ BA ] so that the t/blades are in the correct position for that engine & it's component parts. At some point in the TQ series, Carter used the front two body screws as a means of providing BA. The holes in the bowl & gasket are slightly enlarged to allow for this airflow. Be careful swapping bowls/gaskets etc. If these holes are not already enlarged, it is easy to do it. These carbs are easily recognised; there are two holes inside the choke tower, in line with the screws. The actual metering of the air is done by the sizing of the holes in the carb base. The reason Carter did this is because the sensitivity of the booster design could induce nozzle drip from air being drawn past the boosters. Hence bypassing the boosters to supply the reqd air.
- if more BA is needed, say for a big cam, it is better to drill the sec blades, NOT the primaries for reasons above.