Power FC 2bar map sensor
#1
- Make Haste -
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2bar map sensor
so when my engine was built and installed the builder used an FD 2bar map sensor ensted of a 3bar like i requested, needless to say when i was checking the map tracer (sp?) i noticed at 14psi it was reading the bottom line on the grid, now i'm wondering, i had an akward hessitation where it felt as if the engine cut out at around 6600rpm in 4th gear, the boost guage read 14.8psi peak, i noticed on the knock reading it was 5points higher then normal, could it be a power FC related issue or is there something more?, could anything have happened?, would detonation be a factor or possibility?, for a short while after it would not idle properly and when it did it idled very lean, 16:1 AFR give or take, normally it's at 12.9:1 yet seems ok today once i got to work....
i have a BNR3 turbo on a large street ported engine with the power FC, not sure if that information is needed or not....
i have a BNR3 turbo on a large street ported engine with the power FC, not sure if that information is needed or not....
#2
- Make Haste -
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so when my engine was built and installed the builder used an FD 2bar map sensor ensted of a 3bar like i requested, needless to say when i was checking the map tracer (sp?) i noticed at 14psi it was reading the bottom line on the grid, now i'm wondering, i had an akward hessitation where it felt as if the engine cut out at around 6600rpm in 4th gear, the boost guage read 14.8psi peak, i noticed on the knock reading it was 5points higher then normal, could it be a power FC related issue or is there something more?, could anything have happened?, would detonation be a factor or possibility?, for a short while after it would not idle properly and when it did it idled very lean, 16:1 AFR give or take, normally it's at 12.9:1 yet seems ok today once i got to work....
i have a BNR3 turbo on a large street ported engine with the power FC, not sure if that information is needed or not....
i have a BNR3 turbo on a large street ported engine with the power FC, not sure if that information is needed or not....
#3
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Both sensors only put out a max of near 5 volts. A 2 bar will put out 5V at a lower pressure than the three bar.
So if your sensor setup and MAP REF scales were setup for a three bar instead of a two bar, what happens?
So if your sensor setup and MAP REF scales were setup for a three bar instead of a two bar, what happens?
#6
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map sensors are rated with positive and vacuum pressure
that is, a 2 bar map sensor, is really a 1 bar positive pressure sensor
because it reads -1 bar to +1 bar. so if you want to run 1.5 bar boost, you need a 3 bar map sensor as 1 bar is vacuum or (negative pressure) and 2 bar positive
this would explain why yours flat lines at 1 bar, because, technically its the most it can read in positive pressure
that is, a 2 bar map sensor, is really a 1 bar positive pressure sensor
because it reads -1 bar to +1 bar. so if you want to run 1.5 bar boost, you need a 3 bar map sensor as 1 bar is vacuum or (negative pressure) and 2 bar positive
this would explain why yours flat lines at 1 bar, because, technically its the most it can read in positive pressure
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