I have a 68 Dodge Coronet with a 383 and I dropped almost 4 tenths off my ET when I switched to E85. It was hard to believe but it happened. I was impressed!
E85 works! What is the compression ratio?
10 to 1 is the compression. Believe it or not I'm still running the original long block from 1968. I did give it a set of fresh bearing,rings and hand lapped the stock valves but other than that its genuine Chrysler steel. I have about a grand total into the engine and half of that is the E85 carb. It runs 12.50s all day long in a 3600 lb car.
Besides the carb everything else is the same as when I ran gas. I have a good low restriction filter coming out of the tank and a Carter electric pump on the rear frame rail feeding a Carter Mechanical pump on the engine with 3/8" line all the way. At the end of the season I remove the carb and run Marvel through it and flush the rest of the system out with gas and have never had a problem. Its great fuel!!