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Pulley let down

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Old 04-22-2004   #1 (permalink)
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Default Pulley let down
With the mods listed below (minus the pulleys) I dynoed at 291.7 HP in January. A couple of days ago, I put on the steeda underdrive pulleys and redynoed the car. Guess what: 291.0 HP again. Now, I know colder air is better but ca'mon, 10hp MIA?

What gives...?
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Old 04-27-2004   #2 (permalink)
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Could be as simple as variations on weather, the mood of the dyno man or engine temp
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