GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

underdrive pulley?

Old Aug 13, 2007 | 11:34 AM
  #11  
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Yes, you will notice that the engine rev's MUCH faster in neutral, especially with the pulley and the clutch fan gone.
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Old Aug 13, 2007 | 11:53 AM
  #12  
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Yeah, ASP is what I have and love them. I did both pulleys (crank and alt.) and noticed a good performance gain. After I installed them I went out and did a WOT run...I was at 25 mph and stomped it--it kicked down to 1st and I smoked them all the way through and got a 15' scratch at the 2nd gear shift. Before the pulleys, it only chirped on a 2-1 kick down. I got them from rpmoutlet and got a decent price and a good ship time. I say do both for better performance...
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Old Aug 13, 2007 | 11:58 AM
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I did the ASP crank pulley and the LS1 fans and I noticed a big difference in acceleration from idle, especially in the summer. The engine feels much more responsive also. Beside that, I also gained about 2 MPG with the E-fans and pulley.
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Old Aug 13, 2007 | 02:02 PM
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Anyway with the 6HI conversion at idle

What is this refering to?
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Old Aug 13, 2007 | 02:03 PM
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Anyone know the ASP part number to just the alt overdrive pulley?
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Old Aug 13, 2007 | 02:32 PM
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6HI refers to using all 6 lights at the same time---2 fogs+2 low beams+2 high beams=6HI. That draws a lot of amperage off the alternator to run all 6 lights at once...But BlownHD does have the 160 amp alt though...running a 6HI on the standard 105 amp alt on the 1/2 ton might not cut it...

ASP alt pulley part no: 49-540084
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Old Aug 14, 2007 | 10:39 PM
  #17  
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Are the pulleys a pretty straight forward and easy installation....I just did electric fans, and am definately checking these asp pulleys out...both overdrive and the alternator. more info would be great thanks.
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Old Aug 15, 2007 | 12:53 AM
  #18  
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I would also like to know if it affected anyones AC? Does your AC still cool like it did before the pulley??
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Old Aug 15, 2007 | 12:59 AM
  #19  
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Werd.. I did oth fans and pulley..Great mods!!!
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