Does the underdrive noticeably lower the output of the alternator, affect the coolness of the A/C, or water pump effeciency? Is there no downside? If not, why wouldn't factory just install an underdrive to gain a free 5hp?
I'm even seeing some not advocating the install of these things...
https://www.powerbastards.com/articles/underdrive_crank_pulley.asp
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Last edited by Boxtaboy; 12-05-2016 at 04:30 PM.
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