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Message: [QUOTE="jsantapau, post: 1421331, member: 99193"] From what I understand and I beleive is that if you are throttling the engine you want the engine rev range to be from peak torque to peak horsepower in a fixed gear kart coming out of the turns at peak torque and ending the straights and peak horsepower in a gear box the spacing of the gear ratios of winding out one gear to peak horsepower to drop in the next gear at peak torque with wider spacing at the lower gears since the mechanical advantage of the ratios allows you to stretch each gear a bit to let you catch up to how quick the engine revs In a fixed rpm engine you want it to run at peak torque since that is the most efficient the engine will run [/QUOTE]