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Joined: Sep 2016
Posts: 311
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Sep 2016
Posts: 311 |
I was just wondering if it is OK to run unleaded gas in my 32 stovebolt engine or should I be using an addative?
1932 4 door Special Sedan 1916 490 Touring
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Sep 2016
Posts: 311
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Sep 2016
Posts: 311 |
Thanks Junkyard Dogpu3dtn
1932 4 door Special Sedan 1916 490 Touring
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Joined: Jan 2018
Posts: 32
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Jan 2018
Posts: 32 |
Below is a link to an interesting letter. It was written by Louis Chevrolet in 1931, and he talks about octane ratings. His 333 inverted aero engine was being evaluated for military use by the War Department. According to his letter, regular octane ratings in 1931 were 68 or 69 on the rating scale. Louis Chevrolet talks about Octane Ratings
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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 only reason lead wad added to gas was to make it burn slower, The gas at that time was not refined too well and it higher performance higher compression ratio engine , the engine would "ping" under laoad. It was cheaper to just add lead rather than refine the gas.
In the '20's, '30's and '40's regular grade of gas did not contain lead. The Ethyl grade (leaded) had warnings on the pump about the danger of the lead and warned against it contacting your skin or using for a cleaning solvent.
Last edited by Chev Nut; 02/27/18 03:38 PM.
Gene Schneider
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Joined: Jan 2018
Posts: 32
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Jan 2018
Posts: 32 |
Yes indeed, lead is pretty nasty, and can cause all sorts of health problems.
One of the reasons why octane ratings were lower in the 1920' & 30's was because compression ratios were lower.
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