Pontiac Firebird 1967-2002 Birds of a feather flock together

pulley question

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Old 12-28-2008, 12:45 AM
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wondering if i can replace all of my pulleys with this small *** pulley found under my hood???? theroy is shorter belt= more power right??????


Old 12-28-2008, 01:00 AM
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Search 'underdrive pulley'.
ASP, SLP, RPM, & many others make the 25% crank pulleys and they tell you which belts to use.
Old 12-28-2008, 01:09 AM
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i know bout the underdrive pulley but look at the power steering pulley its ******* huge. what if all the pulleys were this small ones size? it would reduce belt size by at least 60 percent while keeping my power steering and ac
Old 12-28-2008, 01:15 AM
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cmon guys any thoughts bout this idea????
Old 12-28-2008, 01:24 AM
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if you make it too short, the pulleys wont spin fast enough for their respective accessories to run. you wont have any power from the alternator at idle and have no power steering at cruising rev's.

typically when you install a 25% UD pulley, its recommended you install an overdrive pulley for your alternator if you running a lot of electrical stuff like stereos, etc
Old 12-28-2008, 09:55 AM
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now theres what i needed to hear. i want to know any other cons.
Old 12-28-2008, 01:24 PM
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hmmm what are some dimensions on stock pullys ? I have no powersteering at idle i never thought to look for the size of my pullys.




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