Originally Posted by Rob_DOHC

Are you talking about swapping between a high and low boost target map or actually swapping between two fuel/ign maps?

I often use more than one map to increase resolution in areas like idle and cruise. For example, I might swap maps at 10psi from one 16x16 table to another 16x16 table which means one table has 256 cells devoted purely to power runs and another has 256 cells used mostly for cruise and low load stuff. I also do the same with ignition maps for idle if a car has a silly cam.

We also use multiple maps for things like track/road. The only difference here is that lean cruise is ignored and idle is a little richer as well as high load to keep temps down a little.

Or if your talking about why have multiple boost target maps???? Well I guess you trust your missus to drive your car as is ..... other than that I don't think it would ever be touched.