A lot of bracket racers use a quick-and-dirty version of this: a 2-step rev limiter. You can floor it, and it will hover up at your predetermined 'launch' RPM, bouncing off it like it would a rev-limiter, until you drop the clutch, then it lets you rev up to your normal RPM. In the right hands, er, feet, it makes for very consistent launches, and therefore quarter mile times.
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twisted no more
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