Well, without a dyno you will have to go with feel and sound. Backfiring and popping is definitely a bad map. Smooth throttle response and sound will have to be what you go with. Get a laptop with try the different maps. Once you get the smoother sound and response you want, take her for a ride. This will get you close but not perfect. But it is better than riding around with a bad map.
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When in doubt.... Gas it!
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