The one disadvantage of having an automatic car is all the drivetrain loss, especially from the heavy torque converter. Trying to find a way to lighten up components in your automatic's driveline will help decrease the amount of power it robs.
Neal and Marty Chance are known amongst the industry for their hardcore torque converters. Last year they previewed their new, all billet torque converter and this year they made it public. On the 10" torque converter, the total weight is 21 pounds while the 9" is 17 pounds and the 8" is 15 pounds. In testing, they have recorded over a tenth of a second decrease in the quarter mile on a Pro Mod car.
Due to being aluminum, this torque converter will work on anything except for a turbo car that can generate up to 900 degrees in the converter while building boost on the line. For nitrous, supercharged, and naturally aspirated combinations this will keep the aluminum from getting too soft from heat.
Check out
http://www.racingconverters.com for more information.
