Stall converter

[Gordon]

Hi can someone explain how a stall converter works,what it does ? and whats the difference between a stock one and a "2500 Stall converter" dont know to much about them
Thanks Gordon

[EffCee]

Gordon,

The simplest way of explaining how a torque converter works is to use two electric fans. If you place one in front of the other, the one that isn't switched on will start to spin. This is the same principle as a torque converter in an automatic transmission.

"Stall" converters are torque converters with a higher "stall speed than standard. These have been built to allow those engines that develop pwer at a greater rpm than standard to get to the rpm where the power curve starts to produce a significant amount of power before the converter "locks up".

A typical standard torque converter will "lock up" between 1200-1400 rpm. A 2500 "stall converter" simply means that at 2500 rpm the converter will lock up, allowing drive to continue from that rpm range.

A typical performance motor develops power from 3000 rpm to 7500 rpm. The builder may elect to fit either a 3000 rpm stall for the converter, or if it is expected to see some competion use then a 3500 rpm converter or greater would be more appropriate. This way the engine is able to get into the power range that the engine is producing before taking the full load of the vehicle.

I hope that this has helped.

Keith