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post #1 of 15 (permalink) Old 06-09-2010, 10:07 AM Thread Starter
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Lightweight Crank Pulley

A kid at work told me i should get a lightweight crank pullie. What would i benifit from getting one? Where would i get one? And how would i install it?
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post #2 of 15 (permalink) Old 06-09-2010, 10:09 AM
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post #3 of 15 (permalink) Old 06-09-2010, 02:41 PM
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post #4 of 15 (permalink) Old 06-09-2010, 04:57 PM
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You probably would see a small performance gain. I know with tires it's something like however much weight you're turning is like having double that sitting in the car, eg: 4 15lb rims is like having 120 lbs sitting in the car. I don't know what it works out to being on the crankshaft but the principle is generally the same. It's just less weight that you're trying to move and so more power available for moving the car.

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post #5 of 15 (permalink) Old 06-09-2010, 07:45 PM
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We don't have harmonic balancer pulleys do we? I thought the Ecotecs had twin balance shafts inside the block itself to get rid of vibrations...
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post #6 of 15 (permalink) Old 06-09-2010, 08:21 PM
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i have one, get it, it makes the revs faster



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post #7 of 15 (permalink) Old 06-10-2010, 02:14 PM
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i came across this while researching these...ATI - The Dangers of Power Pulleys & Understanding the Harmonic Damper
im not going to claim its the end all be all for these, but it was enough to scare me away from them for the minimal gain.
take what you will from it...
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post #8 of 15 (permalink) Old 06-10-2010, 06:26 PM
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just get it



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post #9 of 15 (permalink) Old 06-12-2010, 10:05 AM
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they wouldnt make a part that would put the engine under jeopardy of failing. if every crank pulley broke a car, they wouldnt make em.

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post #10 of 15 (permalink) Old 06-12-2010, 11:40 AM
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personal choice. Had the UDP pulley in my 07 SS/NA and the 2nd owner still has it in...no problems with it.

I chose the UDP to slow the alternator and AC compressor down (about 10% slower revs then stock size pulley) -- the same size light weight pulley doesn't do this.

Replacing the Harmonic balancer isn't the best way to go -- but I have worked on Toyota engines that had both -- same size engines some had solid steel crank pulleys and some had harmonic balancers -- and you could swap them out! Never had problems with them either -- replaced a bad harmonic balancer on a '92 Toyota truck with a solid steel one out of a junkyard back in 2001. The owner still drives the truck today -- and he has been on 900 mile one-way trips!!!

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