Hi guys, I would like to get some knowledge on what a stall converter does and how it relates to the lift of a cam.
Thanks.

A "Stall Converter" allows the engine to achieve higher RPM with the transmission in-gear, thus allowing you to launch the vehicle off the starting line or from a stop, at that higher, better power-producing engine RPM range.

Sort of like accelerating the engine to high RPM on a Manual-Transmission vehicle, then dropping / releasing the clutch all at once.

The higher engine RPM equates to more air and fuel being processed / converted into greater power output over a given period of time.

Also, a higher stall speed torque converter can (in a sense) temporarily store / absorb energy and even multiply torque, which is released upon launch.

Cam timing events and Lift can be optimized / tailored to support the higher launch RPM allowed by a higher stall-speed torque converter.

You might want to check out the
Moparts tech section for more information.

BTW ALL converters have a certain amount of stall speed. Some more than others.

The Converter provides a "Fluid Coupling" between the engine and transmission. On automatic transmissions, the torque converter takes the place of the clutch found on standard shift vehicles. It is there to allow the engine to continue running when the vehicle comes to a stop. The principle behind a torque converter is like taking a fan that is plugged into the wall and blowing air into another fan which is unplugged. If you grab the blade on the unplugged fan, you are able to hold it from turning but as soon as you let go, it will begin to speed up until it comes close to the speed of the powered fan. The difference with a torque converter is that instead of using air, it uses oil or transmission fluid, to be more precise.

A torque converter is a large doughnut shaped device (8" to 15" in diameter) that is mounted between the engine and the transmission. It consists of three internal elements that work together to transmit power to the transmission. The three elements of the torque converter are the Pump, the Turbine, and the Stator. The pump is mounted directly to the converter housing which in turn is bolted directly to the engine's crankshaft and turns at engine speed. The turbine is inside the housing and is connected directly to the input shaft of the transmission providing power to move the vehicle. The stator is mounted to a one-way clutch so that it can spin freely in one direction but not in the other. Each of the three elements have fins mounted in them to precisely direct the flow of oil through the converter

With the engine running, transmission fluid is pulled into the pump section and is pushed outward by centrifugal force until it reaches the turbine section which starts it turning. The fluid continues in a circular motion back towards the center of the turbine where it enters the stator. If the turbine is moving considerably slower than the pump, the fluid will make contact with the front of the stator fins which push the stator into the one way clutch and prevent it from turning. With the stator stopped, the fluid is directed by the stator fins to re-enter the pump at a "helping" angle providing a torque increase. As the speed of the turbine catches up with the pump, the fluid starts hitting the stator blades on the back-side causing the stator to turn in the same direction as the pump and turbine. As the speed increases, all three elements begin to turn at approximately the same speed.

Since the '80s, in order to improve fuel economy, torque converters have been equipped with a lockup clutch (not shown) which locks the turbine to the pump as the vehicle speed reaches approximately 45 - 50 MPH. This lockup is controlled by computer and usually won't engage unless the transmission is in 3rd or 4th gear.