Thread: Question Compression question.
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Old Oct 15, 2012, 08:03 PM
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3" from insanity, 2' from the computer ,Richford, Tioga county, Southern Tier, New York, U.S., North American Continent, Northern hemisphere, Earth, The Sol System, Milkyway Galaxy, The Universe, The Current Dimension, Your Selected Realm of Reality.
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Question
Compression question.

I asked this question on the BMW forum site I joined about a year ago but haven't really gotten a response, so I'm asking here.

What is the highest compression I can get on regular 87 AKI gasoline without knock sensors or any fancy equipment?

I'm talking about a single overhead cam, 12 valve, straight 6 on carburettors. My engine right now is 8:1 and I'm thinking of doing an engine build (hopefully starting over winter) to get more out of another engine of the same type, but slightly more displacement and 9:1 compression.
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