if he is running the venom 2000 system, it monitors the O2 readings and kills the nitrous if it falls below .6 volts. also it it ties a wire into each injectors and lengthens the injector pulse width to maintain the proper A/F ratio when the nitrous is activated.
im still trying to figure out this"venom direct port system"
i dealt directly with venom when i got my venom 2000 system and they make 3 systems.
the venom 1000, which is like a basic system, the recuser, which is like the NOS sneaky pete system, and the venom 2000, which it a computer controlled nitrous system and laptop programming. but every system they sell only has 1 nitrous nozzle.