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Old 01-26-2012, 06:27 PM   #21
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So I know how much grams a second to expect the engine to consume at idle and tune the maf transfer function correctly for maf mode to work correctly.
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Old 09-03-2012, 09:30 AM   #22
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Why do you need to know g/s? Just install the MAF sensor and log it.
so I knew how much grams a second at idle was gonna be
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Old 09-03-2012, 09:59 AM   #23
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But if it's plugged in and logging, doesn't that tell you the answer?
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Old 09-03-2012, 11:25 AM   #24
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But if it's plugged in and logging, doesn't that tell you the answer?
why would it, all that would tell me is voltage\frequency at idle not grams a second at idle
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Old 09-03-2012, 02:40 PM   #25
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Typically, the B engines draw around 4.5 - 5.5 grams / sec at idle in a stock configuration.

So, now that you possess this information, what fabulous thing will you do with it?
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Old 09-03-2012, 02:49 PM   #26
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Quote:
Originally Posted by Joe Perez View Post
Typically, the B engines draw around 4.5 - 5.5 grams / sec at idle in a stock configuration.

So, now that you possess this information, what fabulous thing will you do with it?
I can see that if it with accessories running. mine is around 2.x to low 3s.

Nothing, I;ve had the info for a while now, have a way to find out mass flow at various engines speeds\loads
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Old 09-03-2012, 03:04 PM   #27
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I am guessing people are not well familiar with the maf as with map. In comparison it would be like taking a map sensor, not calibrating it or anything, just installing it and running it. Tech wants to calibrate it before he tunes it.
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Old 09-03-2012, 03:10 PM   #28
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I am guessing people are not well familiar with the maf as with map. In comparison it would be like taking a map sensor, not calibrating it or anything, just installing it and running it. Tech wants to calibrate it before he tunes it.
Well its fairly easy to calibrate a map sensor if you have another one to go buy or a way to make pressure\vacuum and you will know pretty much its gonna be in that general area. Also if you know the low voltage and high voltage areas of a map sensor output then you know the transfer function of a map sensor as they are linear output.
Maf not so much as the installs can easily change the curve, and they are non linear output.

Anyways just to finish this thread my answer I sought for I had finally came across and is noted in here how to find out. For anyone else that later on looks and needs help.
https://docs.google.com/document/d/1...li4/edit?pli=1
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Old 09-03-2012, 03:51 PM   #29
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This thread is an interesting combination of trolling and over-thinking the subject.

Trolling because no civilization which has advanced beyond fire and the wheel concerns itself with mass flow in absolute units.

Over-thinking because it's not necessary to attempt to predict every possible operating condition when we have the ability to observe the engine's operating AFR with the use of an EGO sensor and plot trends using spreadsheet software.
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Old 09-03-2012, 04:07 PM   #30
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Quote:
Originally Posted by Joe Perez View Post
This thread is an interesting combination of trolling and over-thinking the subject.

Trolling because no civilization which has advanced beyond fire and the wheel concerns itself with mass flow in absolute units.

Over-thinking because it's not necessary to attempt to predict every possible operating condition when we have the ability to observe the engine's operating AFR with the use of an EGO sensor and plot trends using spreadsheet software.
not sure where you get over thinking from but ok.
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