Originally Posted by
Chip
1.5 bar is 21psi mate, not 2.5
You are mixing up absolute and relative pressure I suspect?
lol
Sorry yes what I ment to say was if he has a 250kpa MAP sensor (2.5bar MAP Sensor, 21psi of positive/relative pressure) then his table should look like mine.
Originally Posted by
cj_rst
Interesting stuff! Could someone explain the tables and graphs to me please?! I'd love to expand my knowledge in this area. I understand the 1st table with spark advance and how you would need to change that according to rpm and load, but what's the percentage indicator along the opposite axis to the rpm axis? I guessed throttle percentage but then you can't get 250% throttle, can you?
As for the next table down, I'm presuming this would be the fuelling table (by process of illimination as I know the other table is for spark!), but all I undersand of that table is the rpm key along the bottom!!
I'm scratching my head about the graphs too...
THUS, you can tell I've got no experience of mapping or aftermarket management. I'd love to learn though. I understand the principles and I'm good with computers (work in IT for a living at the mo). If someone could explain the pretty pics in the first post then that would be great
Yup that is the fuelling table, and the % on the left is actually manifold pressure/vacuum meassured in kpa (kilopascal), 1psi = 6.9kpa so 250kpa = 36.3psi of which 14.7psi is atmospheric pressure leaving upto 21.6psi of meassurement for positive/relative/boost pressure, hence a 2.5bar MAP Sensor.
The values in the table are how much fuel is injected at any point.
The graphs are just logs of my AFR (air to fuel ratio), TPS, RPM, and MAP(Manifold Pressure)
