Lightened Pulley - Page 2 - Subaru WRX Forum
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post #16 of 18 Old 05-12-2009, 12:15 PM
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I don't think a Subaru would need a tune after doing a pulley install, all your doing is reducing the parasitic loss.
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post #17 of 18 Old 05-22-2009, 10:20 PM
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I have an Agency Power crankpulley. Im not sure if its the 1lb model or not. It just aluminum. After installing I definitely felt a difference is low-mid range rpms.
I wish I didnt throw away my stocker though. Ever since Ive had the A.P. pulley in Ive got to give it a good bit more gas to get the car moving. Launching also took more getting used to. I can only imagine a light pulley and flywheel. I would hate it I think.
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post #18 of 18 Old 05-23-2009, 07:22 AM
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no you definitely do not need a retune to run a pulley...but just as with any modification a custom tune with the part will always give you a little bit more as you can now maximize the potential of your mods

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