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One of the concerns for street cars on nitrous has always been the compromise in your motor tune, having to run richer, with less timing, so your safe when you spray. Or, having 2 seperate tunes, one for nitrous, and one for Motor.
Using EFI Lives very powerful Custom Operating system number 5, this is a thing of the past. This OS allows us to set the car up with 2 tunes in one, so you can have a max effort motor tune with proper N/A A/F ratio's and timing, and at the flip of a switch the custom OS will add a desired amount of fuel that we pre-set, and pull the desired amount of timing so you are completely safe to spray
If you are going dry you really do not need two tunes. One tune will work great for NA in and then the same tune will adjust the timing when the spray hits the Maf.