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Automotive News & Views Gas Saving Gizmos & Gadgets
332 messages, Last post on Jul 20, 2009 at 12:19 PM
You are in the Automotive News & Views Forum. Your Hosts are steve_ & claires
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Replying to: larsb (Feb 05, 2009 12:09 pm) Where's the criminal action for this one?
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Replying to: steve_ (Feb 05, 2009 2:20 pm) |
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Replying to: larsb (Feb 05, 2009 12:09 pm)
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Replying to: gagrice (Feb 06, 2009 7:31 pm)
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Replying to: shipo (Feb 07, 2009 6:13 am)
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Replying to: gagrice (Feb 07, 2009 6:21 am) To which he replied: "Aha! Yes, it defies the laws of physics as we presently understand them! To which I replied that "if something defies all known laws of science and nature, we call that by definition a 'miracle', so I'm wondering if I could bring my ailing mother to your HHO generator to be cured"?
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Replying to: Mr_Shiftright (Feb 09, 2009 12:09 pm) Ahhh, yet another fine example of a non-scientifically trained mind. 
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Replying to: shipo (Feb 09, 2009 12:16 pm) |
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OK, I thought maybe this would fall into this category and wanted to get some input from some of you engineering-types. Besides, its been dead here. Saw an ad for a lightweight pulley set for an engine. Now, of course, this idea has been around for a long time, but I gotta wonder what the gains are here. This particular set claims, although all stock sized, they are a total of 5 pounds lighter than stock, netting a total of 11 hp and 6 lbs-ft (amazing how all bolt-ons seem to add ~10 hp). I figure this MUST save fuel, too.  So... it just had me thinking. How does shaving weight off the pulleys add power? I mean, sure, its less for the engine to rotate, but 5 lbs? The engine is being asked to accelerate and maintain speed of 3500 lbs. Even if we multiply that 5 by the final drive ratio, we're still talking next to nothing in comparison to the whole picture. So what is it I'm failing to understand?
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