What I mean is blowing compressed air (i.e. shop air) into the 1st stage inlet, while the engine is running. Maybe start at a lower pressure like 20psi, and then slowly increase pressure to a higher vlaue, say 80psi. This could be dangerous as you are pressurizing a part of the engine that may not be designed for higher pressures, i.e. explode, and could cause the combustion temp to increase, though it will more likely decrease combustion temp. My gut feeling is that this would not be a problem, but if you do this you need to know what you are doing and understand it is entirely under your own risk.Why is it dangerous ... Explain please. I see no danger in blowing compressed air in the intake stack. This could be easy to do concidering that I have a 2000 psig. Nitrogen bottle here. I could easily pressurize the stack through the nozzle under 225 psig. and if it is tunned or tune it.
Please explain Raymond.
I'm trying to think of a way to draw a picture to answer your question about tuning. It is not easy. Give me a little time