Why is a torque converter an important performance upgrade when installing a turbo system?
Theoretically, for maximum acceleration the stall speed of the torque converter should match the peak torque rpm of the engine. If a high performance engine makes power at a higher rpm, then a higher stall speed torque converter is what you need to put more power to the ground quicker. When the same vehicle has a turbo installed you want to make sure that you are transferring power to the ground at the best possible rpm and best boost levels. If the stall speed of the torque converter is too low there can be some associate “turbo lag” or delay until the engine rpm comes up and the turbo starts to build boost. The correct aftermarket performance converter that is properly matched to the turbo system will allow for maximum acceleration. In many cases a performance torque converter will take .4-.6/th’s off of your quarter mile ET with no loss of drivability.
