[coyled]

I have the sequential fire all the way up in the rpm band. Also, the wide band o2 sensor. I have individual timing control per cylinder but have not used it. I agree that the ultimate setup would be o2 sensors in all exhaust runners. Its 660hp at the crank flowing 750 cfm thru a 750 cfm holley. It now has the 1050 cfm throttle body, should make more power according to the engine builder but who knows for sure. The fuel map adjusts at every 500 rpm and every 7% of throttle increase. I run it in alpha-n mode which is a throttle position versus rpm table, no map. My cam does not pull enough vaccum at idle or off idle to get good resolution in a map versus rpm table(speed density mode). Are you running speed density or alpha-n? Scott