I guess I don't understand why a rising rate FPR helps the situation to allow an NA car to boost? Can you explain?

Correct, partial throttle might have kinks here and there, but overall it should be a pretty good match. I wish I could say that a 3bar has basically the same output graph, but can just read higher, but I really don't know for sure. I plan to smooth out the WOT side of things with an AFC. Obviously, this is really only an option for someone who wants to run 10+psi boost and is using a piggyback that doesn't have a separate entry to scale injectors.

If somebody has two another data point for the oem sensor I could come up with the linear equation to map output pressure at all voltages. What I know for sure is that the equation to map a GM 3bar at near sea level is (V*8.94)-12.11

 

A rising rate FPR works because the stock ECU isn't controlling the fueling anymore. When you cut off the map sensor from really seeing what is going on, you cannot control how much fuel to add, unless you increase the fuel pressure, to compensate for the increase in flow from the blower. The injectors see more pressure and in turn, increase their flow.

I think partial throttle will have more than 'kinks' with a foreign map sensor that isn't scaled correctly for the stock ECU. I would invest in at least a Emanage Ultimate if you are pushing 10+psi. You'll spend a little more money upfront, but you won't be posting up a 'my motor is knocking' thread in 2-3 weeks.

This isn't even including the issues running an AFC (and subtracting fuel) and 10+ psi with N/A timing tables.

 

EMU or better is needed. fmu is not very good solution, esp as boost increases! not too mention, it does norhting for timing.

you cant bolt on a gm 3bar to a stock ecu and expect it to work. as a matter of fact, even with a standalone, you need to scale the map sensor correctly, and input its min/max voltages etc so the stand alone knows what to do.

this is exactly why when you buy an SOS 3bar map sensor, they give you the info needed to correctly use the sensor.

i just went from the oem shit ass map sensor, yeah eveyrone says it reads to 10-11 no prob, well mine flatlined at 9.5, and my buddies flat lined at guess, 9.5. so F that sensor in its A for anthing above like 8, since it becomes erractic and inaccurate.

i added the aem 3.5 bar sensor. and had to select it as the new sensor, thank fully aem has it already installed int eh software, so you just select it. then i had to scale the load maps to read -15 to 15psi. default is the full resolution of the sensor, or -15 to like 36psi. then you have to redo your whole ignition/timing map. i wish i had done this all at once!