can i leave my 02 sensor in the stock location or it has to be moved? also what do i do about that mass air sensor and i have 28# injectors from a grand national witch fmu do i need?

 

put the 02 sensor in the downpipe i.e after the turbo. if u put it before the turbo the extreame heat and ex preasures will kill the sensor.

the best bet for an fmu is to get an adjustable one,its to hard to just say this ratio is best.though if u cant afford one a 6-1 is generally enough.

the mass airflow sensor should be hooked up on the turbo inlet,it will not read correctly if u put it on the outlet side of the turbo.

 

alright thats all i needed to know thanks

 

The stock o2 sensor can be used between the turbo and manifolds. All the guys with 3800II's do it because they have two o2's and the stock sensor works fine. I put mine in the new pipe that was welded to the y-pipe (that is between the turbo and y). This will allow you to use the stock style non-heated o2. WBo2's do not even read properly when under high pressure, and won't last long either, they need to be after the turbo.

 

the high heat will cause the narrow band to read wrong if before the turbo

 

Everybody at FTV6 is using this configuration.