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  1. mechanicat16

    Old Engines are inefficicent at creating power/torque,WHY?

    Thanks guys, I'm buying a 1968 GTO, my first car. It has the stock 400 engine with the TH400 tranny, it produces about 350hp, is there any way to get more horsepower from it? I know i could buy new parts, but i just mean modifications i could make to the existing engine.
  2. mechanicat16

    Old Engines are inefficicent at creating power/torque,WHY?

    Why do old engines produce such little power for their displacement, for example, the 1968 426(7.2L) hemi produced 425HP.The modern 6.1 L hemi produces about 425 HP, the same as the 7.2! Why is this?
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