GM stamp number on Vacuum advance 319 18 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-28-2009, 07:08 AM
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GM stamp number on Vacuum advance 319 18

Hello everyone
I have an old GM vacuum can and no vacuum gauge to check its specs. Does anyone know what the 319 breaks out to? I know it will pull 18 degrees but dont know when the unit will start pulling in inches of vacuum.
Thanks in advance

Eddy

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Old 07-28-2009, 01:18 PM
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Hey Eddie. Are you sure that number isn't B19 (vs. 319)?

Checkout http://www.corvette-restoration.com/...c_Adv_Spec.pdf

Pat
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Old 07-28-2009, 03:22 PM
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Pat
It is an HEI advance, sorry for not stating that. I had a second person believe that it was 319 18 also. I was led to believe that the older GM HEI units had a three digit number and then the total number of degrees the can offered. I will check again tonight to see if it is a B..Just checked and it is 319 18. I am going to find a friend that has a vacuum pump that I can check the specs again. I guess initial oull and then how much vacuum to pull all the timing in.
Thanks again
Eddy

Last edited by sped921; 07-28-2009 at 05:43 PM.
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Old 08-03-2009, 12:09 AM
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The 319 is the last 3 digits of the GM part number.
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