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Originally Posted by tom s
I have the 65CC d ports on my 446 engine and it liked 34 total with 9.5CR and 91 pump gas.Tom
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Tom S Here is a tip use regular pump gas go back to 30 to 32 degrees total timing and it will run faster. 91 octane is more than you need . Higher octane burns slower that why you are running more timing than some. That goes for anyone else that is running more than normal timing. Drop down a grade of gas and lower your timing and you will be amazed how well it runs.
KEN
HAVE A GREAT DAY