underdrive pulley
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Rookie
Joined: Mar 2008
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From: Memphis
underdrive pulley
Thinking of getting a new underdrive pulley. They're supposed to give about 12hp and 19ft lbs of torque on the hemi. Has anyone gotten one yet? If so does it work? I'm looking for any bolt ons to squeeze the most hp out of my engine without goin into it.
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Joined: Feb 2008
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From: michigan
https://dodgeforum.com/forum/v6-spec...est-mpg-2.html
found that dont know anything about them myself
found that dont know anything about them myself
Professional
Joined: Apr 2009
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From: Essex, England
From a quick Google search...
03-Present Hemi Truck 5.7L Underdrive Pulley. 20% underdrive harmonic dampner. Requires shorter belt Gates pn K060988. 7 hp, & 19 ft.lbs torque to the wheels.
But... $285 not including the shorter drive belt and fitting.
03-Present Hemi Truck 5.7L Underdrive Pulley. 20% underdrive harmonic dampner. Requires shorter belt Gates pn K060988. 7 hp, & 19 ft.lbs torque to the wheels.
But... $285 not including the shorter drive belt and fitting.
Captain
Joined: Dec 2008
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From: washington
Moderate User
Joined: Oct 2008
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From: Albany, NY
You want to make sure you get a quality pulley set. Not a piggyback style or no damper as Hoss's article states.
Honestly, for the little bit of power that is gained, it's not worth it. The dealer will void anything related of course. Your alternator, power steering and A/C will all suffer because those pulleys will rotate slower than stock. That's where you are getting the power from. Your only robbing Peter to pay Paul. Just not worth it. IMO Besides. 345hp isn't enough? Supercharge it then without going internally.
Honestly, for the little bit of power that is gained, it's not worth it. The dealer will void anything related of course. Your alternator, power steering and A/C will all suffer because those pulleys will rotate slower than stock. That's where you are getting the power from. Your only robbing Peter to pay Paul. Just not worth it. IMO Besides. 345hp isn't enough? Supercharge it then without going internally.
Record Breaker
Joined: Oct 2005
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From: Las Vegas
yep, do the e-fan first, if you dont have it already. that ones a little safer. i agree with all above, i wouldnt want to slow down my ac compressor, alternator, etc. The e-fan, i dont really see any downside to as long as you test it and know it can cool down enough. but theres plenty of info on here to do that without a problem.
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Rookie
Joined: Mar 2008
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From: Memphis
Thats what i was thinking but I wasnt sure just how much power it would rob from my accesories, if it was even noticable. Im not dropping 3-4 grand on a supercharger plus install either, as much as I would love to. Havnt done the e-fan yet but plan on it in the future. This just seemed like a relatively cheap way to get some extra hp easily.
Record Breaker
Joined: Oct 2005
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From: Las Vegas
sounds to me like you would be happy with the e-fan. and it looks to be cheaper than the underdrive pulley if you piece it together using the ford taurus fans. i think theres a DIY in here on it.
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Joined: Apr 2008
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From: Diberville, MS
try it out first!
I have an underdrive pulley on my v6. Matter of fact, this is my second truck I have put an underdrive pulley on. I have never had problems with mine. The power gains are worth the money. However, do get a quality pulley. My alternator and a/c have never suffered. I also have the e-fan. Great combo! If I ever get a v8, one of the first mods will be the new pulley, no worries here.