How to choose a converter stall speed

Quite often, a person always seems to ask about what stall speed they should get when buying a new torque converter. Although there is no perfect answer, here's a chart to give a basic idea of where to start based on camshaft advertised duration and rpm operating range.

Adv duration Operating Range Cruise RPM @ 60 MPH Recommended stall speed
260 1200-4200 2000-2500 2000-2500
266 1600-4600 2200-2700 2000-2500
272 2000-5000 2500-3000 2500-3000
274 2200-5200 2600-3000 3000
278 2400-5400 2700-3200 3000
282-286 3000-6000 3000-3500 3500-4000
302 3500-6500 4300-4600 4000-4500

As a general rule for street use, obtain a stall speed with a minimum of 500 rpm into the powerband. This will allow your engine to get into the area where it is designed to operate and your engine will make enough power to drive the converter into its stall speed. If the camshaft has a starting operating range of 2000 rpm, a converter minimum rating of 2500 rpm should be used etc.

Race applications require a minimum of 1000 rpm more stall up to as much as the peak torque range for all out competition. A camshaft that starts to make power at 4000 rpm needs a converter that stalls at least 5000 rpm.

A rated stall speed of a converter is not always exact. Stall speed is determined by how much torque is put into it. True stall speed can only be known by using a transbrake. A converter that stalls at 2500 rpm behind one engine may only stall at 2300 rpm behind a different engine.

Return to Home
Return to Tech tips