RichMax

iTrader: (2)

To clarify some of my assumptions:

The A32 MAFS has a lower threshold for air flow metering than the Z32 MAFS. However, the A32 ECU, when combined with the Z32 MAF, is able to meter airflow coming from a supercharger (the A32 ECU can translate the voltage output from the Z32 MAFS to its threshold). Is this true? If it is, and I employ an SAFC-II/e-manage, then how come I need a wideband to monitor the a/f ratio if the ECU/SAFC combo has all the data input necessary to compute the a/f ratio?

SPiG

iTrader: (7)

The MAF does not measure A/F ratio. It measures airflow. If you put a Z32 MAF with a normal A32 ECU then the ECU will see the 0-5v from the Z32 MAF as if it were coming from a A32 MAF. An A32 MAF and a Z32 MAf have different voltage outputs for the amount of airflow. Since the Z32 can read more then it has a lower voltage for the amount of air.

O2 sensors measure A/F ratio and only a wideband can do that accurately enough to tune with.

NmexMAX

iTrader: (22)

ECU/SAFC combo do not have all necessary input. That vital input comes from a WBo2 sensor + you tuning a/f accordingly.

Hoooper

i think he means that since the computer knows how much air is going in and how much fuel than it should be able to compute that. but it doesnt and thats just how it it. get a WBo2 and be done

SouthFlMaxTech

iTrader: (4)

well durring crusing the car is gonna be at optium 14.7 but when you get into the throtle the car goes into pre programed base maps and that is what the problem is... the A/F alpha is how you can tell if the computer is subracting fuel or adding fuel to maintatin that 14.7 :1 ratio but that is just a bunch of stuff that dosnt answer your question... SPig was right and you need to have your computer re-calbrated.. so you get proper a/f under load and then get it tuned. widebands are good and alot of time working with jim wolf got mine right.