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Barometric sensor
Posted: Thu Jan 19, 2006 5:47 pm
by hoshy
Does my m40b18 (or any other e30 for that matter) have one?
I don't think it does but, I need a definitive answer if pos.
Some guys in an efi list are saying the the setup uses air volume, air temp AND barometric pressure.. But surely it's just the first two?
Damned americans!
Posted: Thu Jan 19, 2006 5:53 pm
by Ant
No baro mate
they are talking shite
Posted: Thu Jan 19, 2006 5:55 pm
by hoshy
had that feeling cheers.
Posted: Thu Jan 19, 2006 7:07 pm
by ItalianM3
Got one on mine so cant be all bullshit!!
Posted: Thu Jan 19, 2006 7:08 pm
by Dan318-is
your car was marketed for italy and portugal; countries with very warm weather so probably would have them?
just a thought
Posted: Thu Jan 19, 2006 7:10 pm
by Simon
Your car has an S14 fitted, that's why it has one.
Posted: Thu Jan 19, 2006 7:13 pm
by ItalianM3
Well he asked if any other E30's had one!!
Simon, have you replaced yours, phoned up BMW as I am driving to the Alps and wanted a new one just in case and they had never heard of it!! C3 also!!
So dont any other E30's have one except for the S14 engined ones?
Posted: Thu Jan 19, 2006 7:21 pm
by Simon
Only the S14 engined cars I know of, not sure if other E30's for US market for example had them fitted.
I'm not suprised at the dealer not knowing nothing about them, but quite suprised C3 haven't.
Posted: Thu Jan 19, 2006 7:23 pm
by Simon
318-is wrote:your car was marketed for italy and portugal; countries with very warm weather so probably would have them?
just a thought
It's a sensor for different altitudes, and air pressure, and adjusts the fuelling.
Posted: Thu Jan 19, 2006 7:23 pm
by hoshy
So what setup does the s14 use for air metering?
Posted: Thu Jan 19, 2006 7:24 pm
by Demlotcrew
Simon wrote:Only the S14 engined cars I know of, not sure if other E30's for US market for example had them fitted.
I'm not suprised at the dealer not knowing nothing about them, but quite suprised C3 haven't.
All cars have them.
The older M10/M30 engines have them too.
Modern cars (M40) have the sensor built into the ECU.
They retard/advance the timing depending on the height above sea level.
Andrew
Posted: Thu Jan 19, 2006 7:28 pm
by Ant
No lookup tables for Baro correction on the maps though dude, perhaps its a hardware dongle and directly alters PWM or some jazz
I stand corrected if this is the case, in fact, I'm gonna rip an ECU down and find the fekker
Posted: Thu Jan 19, 2006 8:14 pm
by hoshy
interessssssssting!
Let me know the results! If I had my spare ECU to hand I'd pop off the cover to look myself!
Could be an important issue in the MAF project.
would it have the sensor encased in the ECU itself? It sounds unlikely??
Posted: Thu Jan 19, 2006 11:26 pm
by MONSPORT42
Certainly need them on South African models:
Cape Town = sea level = 100% Oxygen
Johannesburg = 3500ft above sea level = 70% oxygen in the air
In fact the differences are greater than the meter can cope with and need to be maually retuned as well.
Portsmouth = sea level = 100% oxygen!!!
Posted: Thu Jan 19, 2006 11:39 pm
by kam-325i
MONSPORT42 wrote:Certainly need them on South African models:
Cape Town = sea level = 100% Oxygen
Portsmouth = sea level = 100% oxygen!!!
Air is 78% Nitrogen, 21% Oxygen, 1% mixed of CO2, Argon, Farts, Ozone....loads of others..... !!!
Posted: Thu Jan 19, 2006 11:53 pm
by MONSPORT42
Well spotted Kam. Not being a scientist myself but experienced driving in all these places I guess I was describing air density of all air components. Even the farts are thinner (I'm told)!
Posted: Fri Jan 20, 2006 8:40 pm
by Andy335Touring
Demlotcrew wrote:
They retard/advance the timing depending on the height above sea level.
Andrew
I'd have thought it would be mainly the fueling thats changed due to the differant levels of O2 in the air so it would affect the AFR's ?
Posted: Sun Jan 22, 2006 11:33 am
by hoshy
so did we get an answer ?