8/29/2023 0 Comments Accord 3.5 premium gas![]() ![]() That was dyno proven by Car & Driver back in the day. The 6th gen J30A1 had conservative timing and lower 9.4:1 compression and not even a knock sensor, which is why that engine doesn't gain squat on premium but actually loses power. ![]() ![]() 10.0:1 compression with aggressive enough timing is enough that you can exceed the knock limits of 87 octane fuel. A Honda engineer being interviewed in USA Today went on the record saying that the engine is good for another 10hp and 10 lb-ft of torque going from 87 to 91 octane, with the implication that it was rated on 87 octane for marketing purposes.
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