Ok guys just thinking out loud here and I may be overthinking this but here it goes. Running a stinger plate on motor in sig and using a NX maximizer 4 progressive. I'm using the ignition retard output of the maximizer to trigger the retard on my MSD 6010. It activates the retard as soon as you get wide open, and deactivates it as soon as you come off the gas. My question is, as soon as I lift there may be a tiny tiny tiny amount of nitrous left in the intake for the motor to ingest after the solenoids close and all of my timing will be put back in when I get off the gas. Is this enough to damage something or do I just sound like a complete idiot?

 

Your question is best answered by a study of the ability for air/fuel to enter the engine.
When the Air Door is closed, the air/fuel is also shut of, there is no/little cylinder pressure.

I do work with AID engines, with that case there is much more concern.

Lance

 

Interesting thought, however I think you are overthinking / over-worrying it a bit. How far are the solenoids from the plate? Usually less than 6 inches.

 

Yeh I think I'm overthinking it haha they are about 12 "

 

Not sure if any of this is truly acvurate, but im gonna try my best. Making some basic assumptions and generalizations (900 psi bottle, nozzle at atmospheric pressure, neglecting head loss, etc) I estimate the speed of nitrous at the exit of the nozzle to be a little over 8000 ft/sec

Factor in head loss, and the rate the pressure will drop when the solenoid closes and the line begins to empty, let's just make a safe assumption and slow that down to 1000 ft/sec. That would mean for a 12" line, after the solenoid closes, it would take .001 second to empty completely.

Now, at 6000 rpm, the crank makes a single revolution every .01 seconds. That's 100 times longer than it would take for the nitrous to evacuate the line.

Such a small volume of nitrous, evacuated in such an incredibly short time, seems incredibly insignificant in the scheme of things.