I installed a Innovate wideband O2 gauge and it did not come with any "tuning" suggestions. I Got some good info from my old thread "Teague 509 blower motor jetting. Where to start suggestions? I'm real lean" I would like to know more about what is a safe WOT A/F reading for poker run type driving. There is a stretch of river by my house that is about 15 miles long and I want to jet to be able to hammer it through there. and not melt down my motor. As well as what A/F range is good for idling, and cruising around 55 mph. I have a 28 Daytona with the teague 509, Merlin iron block, Brodix 2x aluminum heads, Bravo xr 135 gearing ,28 pitch prop. I added a new Weiand 8:71 with a superchiller and brand new Holley 750 blower carbs running 34 deg finish timing, 5 pounds of boost.