[kjewer1]

Using the two settings for different fuels makes sense. The thing to be aware of is the different tuning styles that go with each setting. Typically one would tune the pump gas settng with conservative timing and around 11:1 AFR, while on race gas you need (and can get away with) a little more timing and an AFR of around 12:1. I highly recomend tuning with a wideband (3-400 bucks)...