Quote:
Originally Posted by 1969guy
What octane fuel do you run? My 72 custom deluxe has 11:1 compression and I have to mix 4 gallons of 112 octane race fuel to 93 octane to make sure it doesn't ping. Also what's your temperature like? Does it rise after that 45 minutes?
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I usually put a couple gallons of Sunoco 110 in at fill-up, but maybe I should try 4-5 gallons. I ran to the gas station on empty and it was fine from the last full-up and race fuel combo, and this started right after that so you might be on to something. Can just a couple gallons of 110 make that much of a difference? This is the first semi-high compression engine I've had.
The temp stays around 180-185* until I started having this problem with pinging