GPowrie

Friend and myself belive that the slipfit collectors on my dynatech headres are causing false o2 reading. The o2 readings at idle are around 300 and the ltft's are both over 20%. I am thinking this will cause a tuning problem at idle. The readings go back to normal as soon as you start to acclerate. The headers would be neer impossible to stop the leaks completely, so I am looking for a tuning solution. The headers did not seem to cause much of a problem before the head and cam setup, but I would think that the cam may have added air flow to the picture. The idea of idling open loop by brought to my attention, but can you tune it to idle in open and switch to closed loop when throttle is applied?