The 18% loss is just an estimate. No actually knows an exact number. It ranges from 15-18% for a manual tranny, and 18-22% on an auto (these are numbers that I have seen in the past). There isn't really anything that you can do to reduce the loss from the drivetrain. The only thing you can do is swap in a manual tranny if you have an automatic.
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-Aaron
"Lita"
97 Mustang GT Vert
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k&n, air silencer removed, Magnapack cat-back, BBK o/r h-pipe, Ford red front calipers
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