The torque convertor eats up power because there is slipage. In automatics, there is not direct link between the engine and transmissions mechanical parts. The power loss in a Auto is substantionally higher due to the slippage that occurs in the Torque convertor.
To explain it easily, the torque convertor has one part that is connected to the engine, and another part connected to the tranny. The Turbine (Torque convertor part connected to teh engine) flings tranny fluid against the vanes of the part connected to the tranny, the force of the fluid hitting the part causes it to turn, there by giving you motion.
In a manual tranny, there is a direct link between the engine and tranny, and no slipage (as long as your clutch assembly isnt screwed). You still get power loss in a manual tranny, but its because of directional force, ie like the rear axle where the force has to make a 90 Degree turn.
Hope I was able to help.
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64 1/2 "D" code Red Mustang Coupe. 289, C4, Mallory duel point. Ported & Polished 65 heads shaved .01 with 351 valves, 11:1 comp, 1.7:1 rockers, blue wolverine lumpy cam, modified 4100 Hipo 4 barrel. GT Apperance pkg. And to many others to list
2000 Perf Red Mustang GT. 5spd. BBK Underdrive pulleys, Flotech off-road H pipe. Hurst T-Handle, 40 series Flowmasters, Steeda Tri-Ax
64 1/2 red 6cyl coupe.
