A naturally aspirated car is taking in atmospheric pressure = 14 psi (1 bar, or 101 kPa). So the MAP will show about 14 psi from a naturally aspirated car. A boost gauge will read gauge pressure and does not add the atmospheric pressure so it would be zero at 1 atm (14.7 psi, or 1 bar, or 101kPa).Spunkster wrote:A naturally aspirated engine will never make any amount of boost. I you are seeing 14psi without a turbo then you have your units set up incorrectly. Change your pressure unit base unter the units tab of settings.
What I'm saying is I have gauge pressure (from the boost gauge) and absolute (from the MAP) - always about a 14 psi difference. In the case of 15% duty cycle I'm making 11.2 psi.
If you agree with the above can you tell me if 11 psi is too high for 15% duty cycle?