themadscientist wrote:They use a pressure and air temp sensor to deliver an air flow signal to the stock computer. There were several off the shelf chips for common combination that would allow you to get close enough to use the adjustment knobs to fine tune it. The chips could be reflashed like an ECU's ROM.

If you look at the rear of the intake you will see a sensor on the firewall supplied by the red hose. That's the pressure sensor. In the side of the surge tank at the very back you will see a sensor screwed into it. That's the air temp sensor.



Compared to running with the AFM, the response and power was noticeable. Of course that might be from removing the S14 turbo and putting on the T04E,,,naaa.

The device on the right bottom is the VPC. Above it is the Graphic Control Computer, GCC, that adds RPM-range fine tuning. The basic VPC only has a gain knob that cranks the whole map up. It says PFC, but that's because the same GCC could be plugged into an F-CON.