Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#146329 06/25/09 02:33 PM
Joined: Apr 2004
Posts: 191
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Apr 2004
Posts: 191
I have to share this with you. After many times of timing my 1940 216 engine, I have always felt a slight surgeing or hunting feeling in 1st and 2nd gears till I get up to about 30 mph, and then it's fine, Well I decided to experiment with the Octane Selector and at about 6-7 degrees (A) it has removed all hunting and surging. (How sweet it is....) The "Machine" is running about Perfect. I was always afraid to mess with something I don't understand and probably still don't, but boy is it great now. Just had to share this...........

Wes Marquis


six volts forever
Joined: Jan 2002
Posts: 30,701
Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701
Likes: 141
The octane selector would have been better named the "timing selector"....as it allowed the owner to select the amount of timing advance advance where the engine ran the best without using a timing light or losing the original timing setting.

Last edited by Chev Nut; 06/25/09 06:25 PM.

Gene Schneider
Joined: Mar 2007
Posts: 74
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Mar 2007
Posts: 74
Mine is set at six degrees advanced and runs fine. Original 1938 Master HB with 89K on it. Kind of a neat device.


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