At 11:27 PM 2/7/2006 -0500, you wrote: >Similar question, better info. > >http://forums.corvetteforum.com/showthread.php?t=1302518&forum_id=50 > >Ty;er > >constantine pappas wrote: It's been about 6 years or more, but I seem to remember looking at a ZR1 bin and it had two sets a of fuel and spark tables. I assumed there was a "Sport / Economy" switch on the car somewhere. Mike V