A highly oxygenated blend designed specifically for naturally aspirated engines, works best with fuel injection, offering maximum power over all others. When tuned properly, C45 will handle up to 16:1 compression. With its 108 motor octane rating, pulling a couple degrees of timing upon first test/tune is recommended. C45 requires approximately 4 to 6 percent more fuel than VP’s Q16 so a purpose-built carburetor will most likely be required.
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