The FAST and BS3 are pretty close on function. Once somebody chooses one they should have no problem learning how to make changes in the tune. If your running under 1000hp stuff the factory stock computer is really good unless you are racing and need faster change abilitys. I have ran the FAST and BS3 in race cars with great results from both, but the BS3 is better on the cop engines. If you are running nitrous on a dist engine I would use the FAST because it can control nitrous dry and is very nice for racing. We sell both brands here and the BS3 outsells the FAST but that is related to the fact that we sell mostly LS engines I'm sure.
Kurt
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Horsepower junkie.
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