Heres the play by play on the twin tanks for the Octane on demand system we are incorporating in the car.One 91 octane cell and one 116 octane cell the computer will run on the 91 octane cell until the car reaches boost at 130 kpa I start to transition the second to come on injecting 50 percent race gas mixing with 50 percent 91 octane.So we will be able to run a much higher boost level in the 20 pound range but still run 91 octane for just cruising around town.