Gasoline

["Brian Collinsworth" <67imperial@xxxxxxxxxxxx>]

Forgot to mention this before. You can retard your timing to run with 87 octane even with 10:1CR. Our Mopars unlike other engines of the day are designed well enough that they still will run good retarded. Of course not as well as on the blood red gasoline of yesteryear.

Brian

Your 64 would have 10-1 ratio, so you need the highest octane & it may still ping when you really get on it.

John

 

Depends on your Compression ratio. If it is 9:1 or lower, then regular is better. If you have higher than 9:1 then the super is better. The lower the octane rating of gasoline the faster it burns which is better, except when it wants to ignite before it is supposed to preignite.

If you have an engine that has been rebuilt within the last 10 years, then your CR is probably down below 9:1 Most kits and nearly all rebuilders use low CR pistons because of the wonderful gas we have nowadays.

Brian

 

ok , which is better , regular unleaded gas of the super stuff . trying to settle a debate about my 64