Depending on where you are in MD, you could always take a ride over to Cecil County Dragway and get some leaded race fuel. More octane than your car could dream of (or need), but be prepared to open your wallet wide.
There’s allot of snake oil in the form of octane boosters on the autoparts store shelves. A buddy ran an additive made by (I think) VP Fuels in his race Duster, and it did make a noticeable performance difference. But the cam/compression/RPM range of that motor was very different from what’s expected out of an Imperial. For your car it sounds like you might want to adjust your total timing and bring it down a little bit.
Rob McCall – Missing Sunoco 94 in PA ’67 LeBaron
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all parts stores sell all kind of goodies ie: octane boost lead suppliment engine flush ect! i would think these are tested and proven before they can be sold? i never had had luck with octane boosters still have ping when in the floor but 93 octane was like reg back in 64! i live in md sonoco had 94 up till last year here and its gone ive had seen it in penn slvania but a mailer here said he,s in penn and its going away too! maybe if we all lobby sonoco they will bring famous 260 back
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