Torque converter stall ratio

The most versatile converter. Loose enough to spool most turbos, in most elevations and climates, while maximizing low end grunt and keeping the torque converter tight enough when the turbo lights and horsepower is created. This converter should go in trucks that tow and work hard. Approximately - RPM lower than a stock converter. This converter works well with: OE turbos at 0 - 11, ft elev.

This converter has similar attributes to both our 15SS and 17SS. The DA is comes with a billet stator. The torque multiplication on the DA is higher than any of our other Dodge converters. For instance, if you have a car that has a 2, RPM stall converter, and then you hold both gas and brake at the same time, like you were going to power brake, then general RPM that the tires will break loose at is going to be 2, RPM. It is all due to torque, traction, rear gearing, and weight.

Most stock cars will have between 1, — 1, RPM stalls. The reason that a stall converter works is easy. Many performance engines will not have good horsepower until around RPM, which is why when you have higher HP engine with a large cam, you will need a higher stall speed so that it will be closer to the power band when it takes off, otherwise it will fail and start out slow.

A car that has a RPM stall converter in gear and idling will roll along at about 10 MPH, just like any other car that is in gear with the brake off. Normally cruising into the pits, is done with the car idling and in gear. Stalling means that whenever the car is on the start line, and the trans brake is on, and you hit full throttle, the engine will rev up to RPM with the car sitting there, so whenever you slip that finger off the trans brake, and the tranny slips out of reverse, the car will launch at RPM, and a race motor at that RPM is close to hitting the peak torque curve when it leaves the line, which is why you get big wheelies or low 60ft times whenever the traction is good.

Race engines will have no power at a low RPM, and will be shy on torque, so the nastier that the engine is, the higher the stall speed will need to be.

There is a misconception and a lot of misinformation about the poor vehicle performance numbers that are generated by testing a car with a high stall torque converter on a dynamometer.

Most people that are not familiar with how a torque converter operates will automatically think that the torque converter is inefficient. This is totally false and the following facts are why you should not believe the dynamometer numbers while using an unlocked high stall torque converter.

All late model dynamometers have a software program that commands the loading and speed of the vehicle over a certain period of time while making a test pull.