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Thread: Do they actually add horsepower??

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  1. #1
    IA Member Capiton23's Avatar
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    the only thing listed worth getting is a underdrive pully. it reduces unsprung weight at the crank, and is smaller in diameter, reducing output to accessories. thus it reduces parasitic loss at the crank, netting you more HP, and quicker reving

  2. #2
    Stereo Junkie TSiFTW's Avatar
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    Not worth the money, especially on a 420a Eclipse. If thats what your talking. I had underdrive on a 420a and it freed up like 2 hp. To get power out of it, boost it. Mine liked nitrous too, even though I only used it for a few weeks.

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