Thread: Speed in first gear?
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Old 03-13-2005, 06:53 AM
mr0077 mr0077 is offline
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Ant, if this is purely for performance (and cruise is secondary), a simple approach would be to establish the desired top speed, and divide that by your desired speed in first (I agree, 60 is a good choice). If you pick 165 mph tops, you end up with 165 top speed/60 first gear = 2.75:1 first gear ratio, with something like a 3.45:1 rear end ratio.

If the cruising rpm is more important, work it backwards from the desired cruise speed/rpm, for example 70 mph/2500...
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