PWM used to progressively control nitrous?

[I Hate Import Cars]

I used the search function for this but couldn't find anything about it. I'm debating switching over to S300 from Neptune, but want to know if the reason I want to is even doable...

The motor is a B18C1 with an LS crank, forged Eagle H Beam LS rods, JE 84.5mm nitrous pistons (11.5:1), ported B16 head and intake, Hytech longtube header, Comp stage 2 cams and valvetrain, blah blah blah...

I'm running direct port nitrous on the car and right now we're hitting a 140hp shot on it dry and fattening up on the injectors accordingly (ID 1000CC's). The problem is that I want more power but have traction issues as it is with that much hitting all at once.

I was told that in S300 there is a PWM output for running a boost controller, and thought "Hey! Why not use that to progressively control the nitrous engagement so I can run a bigger total hit?"

So my question is, has anyone ever done this, and if so, is there a fuel/ignition table for this that has already been built?

[locash]

The more I look into this, the more it seems like it might be more of a headache than it is worth. The problem is that you cannot enable PWM output based on other switches or parameters. So, you would need to base the PWM output on vehicle speed, and also have the nitrous parameters set to work on that same vehicle speed. The problem is that you cannot turn off the PWM output based on other parameters like TPS, so at the end of the track when you lift off the throttle, the PWM output would still be on, causing the nitrous to continue flowing. You would need to tie in some relays to turn off the power (or ground) to the nitrous controller when the nitrous fuel and timing controls are no longer active.

Better idea, just use a standalone progressive nitrous controller.

[I Hate Import Cars]

The more I look into this, the more it seems like it might be more of a headache than it is worth. The problem is that you cannot enable PWM output based on other switches or parameters. So, you would need to base the PWM output on vehicle speed, and also have the nitrous parameters set to work on that same vehicle speed. The problem is that you cannot turn off the PWM output based on other parameters like TPS, so at the end of the track when you lift off the throttle, the PWM output would still be on, causing the nitrous to continue flowing. You would need to tie in some relays to turn off the power (or ground) to the nitrous controller when the nitrous fuel and timing controls are no longer active.

Better idea, just use a standalone progressive nitrous controller.

What does THIS guy know? ;) Hey Joe, I figured I'd jump on here and try to get as much knowledge about the system before we do it so I don't have to call you 3 times a week with questions and keep interrupting you.

If I did it with a stand alone controller, a few questions.

A) How would the ECU know to add fuel and pull timing, and at what progressive rate?

B) Also, the controllers work by progresssively adding nitrous based on time, so 3 seconds in it's at 15% duty cycle, 5 seconds in it's at 27%, etc etc...

How would we use that?

[7rrivera7]

15 years later...

Did this ever get done?