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az supporter
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Post Posted: Thu May 29, 2008 2:25 pm 
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Does anyone have a g16 crank pulley handy? (the one that runs a serpantine belt) I need to know what the dia of the g16 one is.

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Post Posted: Thu May 29, 2008 4:15 pm 
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what point do you want to measure from?

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Post Posted: Thu May 29, 2008 4:32 pm 
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royce wrote:
what point do you want to measure from?


If you look at the pulley (ascii art below) from the side you can see the grooves for the belt. I guess if you measure from the apex of one of those (eg, the '/\' bit) to the same on the other side. If I do the same on the other pulley I have I should be able to calculate the drive ratio.

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Post Posted: Thu May 29, 2008 5:28 pm 
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when calculating drive ratios do you need to take the mean diameter? ie from middle of the valley to middle of the valley?

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Post Posted: Thu May 29, 2008 6:52 pm 
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Pubic wrote:
when calculating drive ratios do you need to take the mean diameter? ie from middle of the valley to middle of the valley?


Dunno. If the height is the same on both pulleys it shouldn't matter. Might do some sniffing around and see what I can find out.

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Post Posted: Thu May 29, 2008 9:44 pm 
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Found an online calculator http://www.csgnetwork.com/pulleybeltcalc.html

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Post Posted: Thu May 29, 2008 11:01 pm 
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As best as i could measure its 130mm.

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