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Using a burette, the Bow Tie combustion chamber size was measured at 70 cc. To keep the field level, the AFR 180s were decked to deliver 70cc chambers, ensuring the same compression ratio.<p>
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Using a burette, the Bow Tie combustion chamber size was measured at 70 cc. To keep the field level, the AFR 180s were decked to deliver 70cc chambers, ensuring the same compression ratio.

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