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obviously running at an RPM below that at which you make peak torque will be innefficient, this has been a well known fact for some time, but unless you are going to run your vehicle far faster than you should or in a lower gear, then you're stuck with what you have, and should find the best Vehicle speed/GPH ratio that works for you. when we're accelerating we want to be in the optimum spot on a BSFC chart, once we're up to speed, that chart is irrelevant unless you plan on a gear swap.
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