MSefi.com read only forum (Jan.15,2018)

Yeah, I can see after browsing some of the PDFs posted that there is a lot more to it than most people think. :shock: Although I'll bet the MS baro correction works good for most people that run normal street car setups with mufflers, etc.

That's cool that you'll be able to tune it in MS-II ...

Can we say with certainty that no one has complained about the MS baro correction being wrong in actual usage? I mean, I haven't read of anyone having a head scratching moment with regards to the baro correction, it always seems to work correctly for everybody.

And the same correction factor should ...

I can't win that argument, it's like trying to argue that the world is round 500 years ago. We all know it's true, but where's the evidence?

I need more sources for baro correction on map sensor engines. Anybody got any? Books, anything?



Thanks.

Thanks a lot Colin, very insightful.

Too bad that turned into an argument, I was really just wanting to figure out how to setup my table (it's a 2d graph of fuel% vs baro pressure) with the proper numbers. I doubt it will ever happen or be correct. The AEM doesn't take into account injector open ...

barocor = 100.0 * (1.0 - 0.0047 * (pressure - 100.0))

= 100 * (1.0 - 0.0047 * (85 - 100.0))

= 100*(1.0 - 0.0047*(-15))

=100*(1.0 + 0.0705)

= 107.05%



Well, it's good to have that info on this board for people to search for, anyway. I never did like the old yahoo board.

Okay, that ...

Erik88GT wrote:barocor = -1493 ?

So what relevence is that number?

Oh, and the AEM "engineer" isn't budging...
http://forum.aempower.com/bbs/viewtopic ... 6776#66776

And he says: "I don't know if I would take what mega squirt has to say as gospel. "

Thanks guys, that's what I was looking for!

So, barocor = 100.0 * (1.0 - 0.0047 * (pressure - 100.0))

then for a pressure of 85kpa:

barocor = -1493 ?

What exactly does the barometric correction do in MS in regards to final pulsewidth? Does anyone know the calculation?

I have an AEM EMS on my other car and some of the guys on their forums claim that barometric correction is not necessary on MAP sensed engines. People actually seem to be split 50 ...