Upgrading Pulley - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 04-29-2009, 08:27 AM   #1
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Default Upgrading Pulley

Ok guys a buddy of mind suggested a Pulley upgrade on the SC. Any suggestions on a good brand/size etc?

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Old 04-29-2009, 08:35 AM   #2
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3.5" pulley. You can use a press on or a MPS if you think you will be changing sizes again. Intense racing and ZZ performance both sell them. You will need access to a pulley puller.
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Old 04-29-2009, 10:08 AM   #3
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Ok coo. What kind of performance improvements can i expect with that size pulley? and how much if you got a rough guesstimate.
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Old 04-29-2009, 02:00 PM   #4
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Pulley Boys - GMSII

performance boosts increase depending on other mods... dropping should be a noticable difference tho
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Old 04-29-2009, 02:30 PM   #5
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Figure a rough estimate of 10 to 15 HP depending on how well the engine does. Enough that you should feel a improvement.
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Old 04-30-2009, 05:36 AM   #6
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Thanks for the help.
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Old 05-14-2009, 04:14 PM   #7
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good to have supporting mods too
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Old 05-15-2009, 05:22 AM   #8
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Oh definitely. Im in the process of opening up rest of exhaust now(hi flo cat). Have already upgraded mufflers. Ive got a 180 degree thermostat in the mail. And I'm told since im not going past a 3.5" pully I shouldnt have to worry about anything else. Let me know if im leaving something out. Have already scanned for KR and am currently sitting at a very reassuring 0. But im new to the pully game so again let me kno if im missing something.
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Old 05-15-2009, 08:11 AM   #9
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You will want to upgrade your intake. Adding a shift kit will help, as will a performance tune.
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Old 05-15-2009, 10:05 AM   #10
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Ok being relatively new im a little foggy on some of these mods. Im assuming the performance tune is done via the PCM. What kinda price tag can i expect and where would i have it done? The shift kit, what exactly is it, is it asimple install, and again whats the common price tag?
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