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

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VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1937-1945 Octane Selector

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Octane Selector #146329 06/25/09 02:33 PM
Joined: Apr 2004 Posts: 191 Claremont, Ca. whmarquis OP Shade Tree Mechanic
OP whmarquis Shade Tree Mechanic Joined: Apr 2004 Posts: 191 Claremont, Ca.	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

Re: Octane Selector whmarquis #146337 06/25/09 06:24 PM
Joined: Jan 2002 Posts: 30,701 Likes: 141 West Allis,Wi. Chev Nut ChatMaster - 25,000
Chev Nut ChatMaster - 25,000 Joined: Jan 2002 Posts: 30,701 Likes: 141 West Allis,Wi.	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

Re: Octane Selector Chev Nut #146348 06/25/09 09:29 PM
Joined: Mar 2007 Posts: 74 texas machb38 Shade Tree Mechanic
machb38 Shade Tree Mechanic Joined: Mar 2007 Posts: 74 texas	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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