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- Jun 30, 2012
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If you raise the comp. ratio in many motors, it often involves using pistons with higher crowns. If you look at any used high comp. piston from a Triumph 650, the side of the crown away from the spark plug is always coked up. What does that tell you ? If you leaned the jetting off to efficiently use all the fuel in the combustion chamber, you'd probably burn the piston near the spark plug.
Many years ago, there was a fast guy called Peter Allen here in Australia. His 650 Triumph motor had two spark plugs per cylinder. It probably worked, but it is not a good answer. The other two plugs were 10mm and put in at weird angles.
Many years ago, there was a fast guy called Peter Allen here in Australia. His 650 Triumph motor had two spark plugs per cylinder. It probably worked, but it is not a good answer. The other two plugs were 10mm and put in at weird angles.
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