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BLAT!

BLAT! is a board that controls the OEM BiModel on the holden commodore SSV series. Initially made to retrofit them to an older 2010 commodore. BLAT! can interface with the SoundBoi controller that connects to the car and automatically controls the valves.

Exhaust Valve Pinout:

  1. GND
  2. SIGNAL
  3. NC
  4. +12V
  5. NC(May not be present)

Electronic signal specification

The signal going to the valve must be a 200Hz PWM signal at 10V (0-10V). At 20% duty cycle the valve will be closed and at 80% duty cycle the valve will be open.

BLAT! Converts simple 0-5V logic signal into the required 10v PWM 200Hz signal. Further this board controls the power to the valves through the relay.

PCB:

alt text