Originally Posted by
dojj
one more thing i need to know
why are you talking about 3.2 and then changing it to 2.2 bar? isn't this just confusing the issue even further or is there a reason for this?
unless you are using the negative vacuum to add to the bositive boost pressure? but unless the computer needs to see this how does that work?
thanks you
Yes, the 3.2 is absolute pressure, the 2.2 is pressure versus atmospheric.
The ECU needs to see the 1 bar of vacuum so it can fuel down there as well (well techincally it needs to see from about -0.6 bar of boost, or 0.4 bar absolute as thats about as low as the engine will dip)