So it's late, I'm tired, but a small problem on the car is bugging me. Looking for some advice.
I was told to leave the "sensor IN OUT" numbers alone, default is "1:1". I'm not sure if this is right. I know the two number are supposed to be the same, but should they both be set to number 1, or to another number?
I'm hitting boost cut when the pressure gauge on the AFC reads 96 kpa. I have -5 fuel correction set at that RPM though (and may move it even more negative, I have a super conservative 10:1 AFR set right now), so that should mean boost cut should be at 105 kpa. The AFC didn't have any sort of input to know what kind of sensor I was using, other than it's a pressure sensor, so how would it know what voltage equates to what pressure. I'm guessing this is the one purpose of the sensor IN OUT numbers, I think they are there to calibrate the gauge to the output of whatever map sensor you're using... because, for example, a GM one bar map might read 2.5V under vacuum, while a GM 3 bar map would read 2.5V under pressure (I'd dig up real numbers for this comparison, but it's not important, just know they would be different and the AFC gauge would be way off).
Using two different numbers would allow you to use a map sensor that's calibrated for a different voltage range, like using a 0-2v map sensor on an ECU that came with a 0-5V sensor. This is much more useful on MAF based cars, as almost everything has a 0-5V map sensor.
So if any of this made sense, good. I'm exhausted, I hauled 800 pounds of laminate flooring in my supra today and then carried it up two flights of stairs, and ripped up a bunch of old carpet and hauled it down the stairs (not into the supra), and drank some beers. I prefer working on cars.
Also, I'm an idiot for not just installing a normal boost gauge to verify my boost pressure. I assumed the gauge on the AFC was accurate, without thinking "hey, how DOES that work?".
I was told to leave the "sensor IN OUT" numbers alone, default is "1:1". I'm not sure if this is right. I know the two number are supposed to be the same, but should they both be set to number 1, or to another number?
I'm hitting boost cut when the pressure gauge on the AFC reads 96 kpa. I have -5 fuel correction set at that RPM though (and may move it even more negative, I have a super conservative 10:1 AFR set right now), so that should mean boost cut should be at 105 kpa. The AFC didn't have any sort of input to know what kind of sensor I was using, other than it's a pressure sensor, so how would it know what voltage equates to what pressure. I'm guessing this is the one purpose of the sensor IN OUT numbers, I think they are there to calibrate the gauge to the output of whatever map sensor you're using... because, for example, a GM one bar map might read 2.5V under vacuum, while a GM 3 bar map would read 2.5V under pressure (I'd dig up real numbers for this comparison, but it's not important, just know they would be different and the AFC gauge would be way off).
Using two different numbers would allow you to use a map sensor that's calibrated for a different voltage range, like using a 0-2v map sensor on an ECU that came with a 0-5V sensor. This is much more useful on MAF based cars, as almost everything has a 0-5V map sensor.
So if any of this made sense, good. I'm exhausted, I hauled 800 pounds of laminate flooring in my supra today and then carried it up two flights of stairs, and ripped up a bunch of old carpet and hauled it down the stairs (not into the supra), and drank some beers. I prefer working on cars.
Also, I'm an idiot for not just installing a normal boost gauge to verify my boost pressure. I assumed the gauge on the AFC was accurate, without thinking "hey, how DOES that work?".