Does anyone know either the formula for turning the MAF voltage to grams per second of air, or have a graph of MAF voltage to grams per second? I'm insane and would like to monitor the mass air flow on my car. I'll grab the injector duty cycle at the same time and get a rough estimate of A/F ratio and theoretical power generated.

let me check, i will tell you that consult does it easily. if you have access to a scan tool i would try it. i will see if the fsm has a lookup chart. if not, i could try to just get consult gm/s values matched up against voltages for you. this would be on another z32 and would not necessarily be a perfect one. my sisters twin turbo is always available, but i have to get it running again.

That would be awsome.

unfortunately that may take awhile. dont let me forget though.

You will have to measure the ignition advance to determine power output as this varies with coolant temp and knock count.

http://www.vetteguru.com/mods/howto/#ma ... %2...l.htm

MAF_FUNCTION # Mass Air Transfer Function( 15.9998, 835.509 ( 4.76807, 835.509 ) ( 4.44312, 695.465 )( 4.177, 595.977 )( 3.88599, 499.658 ) ( 3.54395, 399.219 )( 3.35498, 347.574 )( 3.14893, 295.612 )( 2.90991, 243.334 )( 2.69409, 201.828 )( 2.58203, 182.5 ) ( 2.44995, 161.272 )( 2.31592, 142.261 )( 2.15405, 120.083 )( 1.98901, 100.122 )( 1.88989, 90.2996 )( 1.80298, 82.3786 )( 1.69092, 72.8734 )( 1.57397, 62.4176 )( 1.46802, 54.1798 )( 1.32104, 44.6745 )( 1.18188, 36.7535 )( 1.09106, 32.6346 ]The x value is the Voltage on the MAF sig line. The y coordinate is the Kg/Hr flow rate. This allows you to use the data provided by Pro M (Best Products Inc.)

The above is not exactly for a Q or J

The following functions can be used to estimate flow data for various injector calibrations. V is the voltage read between the MAF sig (pin 50) and MAF return (pin 9). ** means "raised to the power of".

Calibration Flow equation (Kg/hr)19 lb/hr Flow = 1.4925(1.384+V)**3.5.24 lb/hr Flow = 1.990(1.384+V)**3.5.36 lb/hr Flow = 2.85(1.384+V)**3.5.

You Sir, are the Man.I take it the voltage-KG/Hr is for the Z32 MAF.Thanks.

The above is all for a Ford, but the 36lb equation is close to the 370 cc injectors in the twin turbo 300zx and the Q. The 24lb might beclose to a J30.

The only way to know for sure is to measure your MAF vs airflow