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Joined: Nov 2015
Posts: 239
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Nov 2015
Posts: 239 |
What were the octane ratings back in the 50's and 60's. I know there have been some changes in the way it is calculated because of the ethanol and being unleaded so I guess I am wondering what was available then and how a particular rating then compares to the same rating now.
I hope this makes sense.
Thanks, Pete
1951 styline deluxe sport coupe w/54 engine and power glide
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Joined: Apr 2018
Posts: 18
Grease Monkey
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Grease Monkey
Joined: Apr 2018
Posts: 18 |
And along those same lines, is it better to run no ethanol gas, even if the carb and fuel pump are compatible with ethanol?...
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Joined: Nov 2015
Posts: 239
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Nov 2015
Posts: 239 |
The reason I am asking is because I am looking at a 65 Corvair with the 140 hp motor. Folks on the Corvair forum are saying I should run premium gas, especially in the summer, to prevent pinging.
Just doing a little research.
Thanks
1951 styline deluxe sport coupe w/54 engine and power glide
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Joined: Jan 2006
Posts: 7,046 Likes: 107
Hall Monitor ChatMaster - 7,000
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Hall Monitor ChatMaster - 7,000
Joined: Jan 2006
Posts: 7,046 Likes: 107 |
It doesn't say the specific octane but it does say any Corvair engine other than the 95 HP should be run on premium gas. https://www.manualslib.com/manual/1035230/Chevrolet-1965-Corvair.html?page=35#manual
VCCA Member 43216
Save a life, adopt a senior shelter pet.
1938 HB Business Coupe
1953 210 Sedan
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
I run premium in my Corvair particularly in the warmer weather.
How Sweet the roar of a Chevy four!
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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 |
I would use the preimum because if you have pre-ignition in your engine it can cause the hadened valve seats to fall out.
No use taking a chance.
Gene Schneider
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Joined: Apr 2018
Posts: 18
Grease Monkey
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Grease Monkey
Joined: Apr 2018
Posts: 18 |
We bought a new '66 Corvair Corsa, 140hp 4 carb engine w/ 3speed. It was a special order. We could have driven the same Marina Blue car home that day with a 4 speed--$64 option. My dad said--It's just another gear to shift...
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