Pulley Ratios

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quangtri
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Joined: Wed Mar 26, 2008 10:53 am

Pulley Ratios

#1

Post by quangtri » Fri Jan 08, 2010 11:27 pm

I have a question about Primary belt pully ratios. I've read that the standard is 31E and 47Clutch I just checked my 8mm 11/2 Primo pullys and they are stamped 39 and 62, this is followed up with 24Trans 51 rear. I've done a search here and find a site posted by Jack but for some reason I can't bring it up, can someone help me find what my final ratio is? Oh yea I should mention this is a 1960 stock trans and frame. Thanks



panhead
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Re: Pulley Ratios

#2

Post by panhead » Fri Jan 08, 2010 11:35 pm

Is this what you are looking for: viewtopic.php?f=65&t=5877?

It downloads a program to calculate the ratios.

quangtri
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Re: Pulley Ratios

#3

Post by quangtri » Sat Jan 09, 2010 12:12 am

Thanks Panhead 65mph @2300 rpm this was figured using 25 trans sprocket

mbskeam
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Re: Pulley Ratios

#4

Post by mbskeam » Sat Jan 09, 2010 2:46 am

read this...

viewtopic.php?f=5&t=3184&hilit=tiny+tach

this is with the same primary as yours and 25T trans and 51 rear

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