Is there a table that references speed vs fuel at wide open throttle? Ever since I installed the T56 my car hasnt run better than mid 13's @ 103 MPH. The speedometer is off by a bit both in the ECM and on the dash. I have the road speed constant set to 40,100, and the dash speedo value is set to 96. The speed reads about 20 MPH high in the ECM and 10 MPH high on the dash. How bad is that affecting the ECM? The O2 values are in the high 800's and drop steadily as I go down the track. Adding fuel in PE mode doesnt seem to affect this. I can get the fuel up to 950's in first gear and by the time I get to 4th gear the O2's have dropped steadily down to the 850's. The curve is similar to the speed but not exact. Any ideas? Should I post the Diacom files?