[Ed Wright]

My GM Calibration Engineer ("tuners" on the internet) friend told me about what all they had to go through to get that engine past EPA. No timing, and a 60 second P.E. Mode delay. Like the power valve on your Holley carb not opening until you had the gas pedal on the floor for a minute. They had to keep them out of P.E. (Power Enrichment mode) during the drive cycles in the EPA testing. Shortening that delay, or setting it to zero, is a mileage killer for people with poor driving habits. I have ridden with people that move their right foot all the time. Their mileage will be lower than other's everytime.