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what gains will I see form an underdrive pulley?

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Old 06-05-2007, 01:42 PM
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Default what gains will I see form an underdrive pulley?

just as the title says.... what gains will i see in engine performance? will I see my voltage drop because of less alternator spin? will power steering be affected or a/c? give me the pros and cons of a pulley. thanks
Old 06-05-2007, 01:51 PM
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I would like to know also...
Old 06-05-2007, 01:54 PM
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I've seen 12rwhp 8rwtq gains. There are alternator pulleys available so you don't lose voltage. P/S and A/C aren't affected much if at all while driving. You'll notice it more at idle/stops.
Old 06-05-2007, 02:21 PM
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Somebody didnt use the search......

10hp is the most youre really gonna see, You should gain a little bit of gas mileage. They do make overdrive pulleys for the alt. to make up for the underdriven pulley, and a/c and p/s wont be affected much
Old 06-05-2007, 02:29 PM
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i experienced a h.p gain in my 2001 formula..It's all part of a "combination" that works for you.
Old 06-05-2007, 03:57 PM
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Originally Posted by Ericbigmac83
Somebody didnt use the search......

It only works for 3 hours a day......... and most people are sleeping during those hours.



When I did the pulley I didn't notice a huge difference. It will help though.
Old 06-05-2007, 04:04 PM
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+1 on the combination effect....................It is a combination of the little stuff that eventually gives you a large gain: pulley, lid, ported tb etc.

If you go ahead and get an alternator overdrive pulley, you won't see any bad effects of the underdrive pulley.




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