Underdrive pulleys?
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Post Fiend
Joined: Jun 2004
Posts: 8,147
Likes: 1
From: Joppa, Maryland
Underdrive pulleys?
Whats everyone think of these? Do they really provide power gains? Is it safe to turn your accessories a lower speed all the time? (if so why didn't the manufacturers do this?)
To me it seems like this is something that the engineers could've taken care of if it was safe.
Discuss.
Paul
To me it seems like this is something that the engineers could've taken care of if it was safe.
Discuss.
Paul
Elder User
Joined: Jun 2004
Posts: 540
Likes: 0
From: Northern MD
Underdrive pulleys became all the rage with the 5.0 Mustangs. I've seen dyno tests where they can pick up 5-10 horsepower when using them. The only downside there might be is if you were to spend a lot of time in traffic idling, then the alternator might not keep the battery charged up. Otherwise, they're a fast and relatively cheap way to get some free horsepower.
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