Well if my math is correct the numbers you posted seem to make perfect sense at about 15% loss. If your car is advertised at 220hp I would have to say they are using flywheel hp. 220 x .15 = 33 ......... 220-33=187 hp at the wheels you have 198 at the wheels so a ball park figure would bring your mods in at 11hp. You are probably somewhere around 231 hp at the flywheel.
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2002 TT
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