didn't I say siphoned in an earlier post??? Like post 16 ?
Siphon action works on the gravity principle, once started then it works on the difference in HEIGHT of the two liquids. I was referring to DIFFERENTIAL PRESSURE between the outside pressure (absolute pressure...or high pressure) and the venturii pressure or manifold vacuum (or low pressure), both are a function of flow of air, and the differential pressure varies with flow.didn't I say siphoned in an earlier post??? Like post 16 ?
Thermoquad carbs were great in principle but difficult to tune because of the lack of metering components. GM's Quadrajet's were excellent as well based on the same principles (small primaries = high mixture velocities and good throttle response) but were probably the least understood. Most guys just replaced them with a Holley. Again a real availablity of tuning components...jets & primary and secondary metering rods...was an issue.
