compression

  1. Night Runner

    Compression ratio?

    So I’m just gathering info for the future. I’m wondering what compression ratio in a 3.0 SHO would be 92 octane. I would like to know so I could run premium pump gas so I don’t have to buy any race gas. Save some money
  2. MikeSho

    A Different Octane Question!

    So the 3.5L in my 2015 has a compression ratio of 10:1. If I remember my compression basics correct, at 10:1 the engine should be screaming for 100-Octane Gas. If 10:1 runs on 87, the timing must be retarted quite a bit. I take it this is one of the main purpose of the tunes? To advance the...

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