maf voltage at idle
Does anyone know off hand what the maf voltage is at idle on a 1.8l engine or around. Also does anyone have a map of grams a second to voltage of the 1.8l maf.
Interested in how much air the engine is drawing in at idle. |
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olderguy whats the link for?
I see, unfourntaly I don't think that will give me the info I need. Thanks though olderguy |
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sjmarcy do you have grams a second to voltage for that maf output?
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Originally Posted by Techsalvager
(Post 692763)
sjmarcy do you have grams a second to voltage for that maf output?
:rolleyes: What are you trying to accomplish, exactly? |
Looking to see what the draw of airflow is at idle in grams a second to see if my KA24DE maf I have will be ok or if it will not scale correctly at idle. Considering the 2.4l is a bigger engine and probably wouldn't need to go as low as 1.6l\1.8l equiped maf would need to.
Looking to implement it in the MS2 I have. |
Originally Posted by Techsalvager
(Post 692768)
Looking to see what the draw of airflow is at idle in grams a second to see if my KA24DE maf I have will be ok or if it will not scale correctly at idle. Considering the 2.4l is a bigger engine and probably wouldn't need to go as low as 1.6l\1.8l equiped maf would need to.
Looking to implement it in the MS2 I have. |
Originally Posted by sjmarcy
(Post 692775)
So…you plan to use the Honda MAF on your Miata?
Yes if it can scale to what the engine will draw in. |
Originally Posted by Techsalvager
(Post 692778)
Nissan maf
Yes if it can scale to what the engine will draw in. I don't see why you couldn't accomplish this. The MAF itself provides a voltage output (not frequency), yes? The muscle car guys run large MAFs all the time. They do things like change sensor tube sizes, process the voltage via opamps, or do it all in the 'puter. |
Originally Posted by sjmarcy
(Post 692779)
Ok, Nissan.
I don't see why you couldn't accomplish this. The MAF itself provides a voltage output (not frequency), yes? The muscle car guys run large MAFs all the time. They do things like change sensor tube sizes, process the voltage via opamps, or do it all in the 'puter. |
Originally Posted by Techsalvager
(Post 692781)
yes it is voltage output 0-5v
I guess you'll need MAP too as you are boosting IIRC. Can you describe your plans in more detail? Thanks. |
I can't really add much to this, but is there any reason why you're going to all this work fitting a differentn MAF onto the car when you could easily switch it over to MAP and get ride of the MAF altogether?
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Originally Posted by sjmarcy
(Post 692784)
Ok then as Nike says, Just Do It.
I guess you'll need MAP too as you are boosting IIRC. Can you describe your plans in more detail? Thanks. Plan is to install the MAF and tune for fueling with it, I believe the maf use the AFRtable instead of the VEtable to deal with fueling. So putting 14.7 in the 1000rpm vs 30kpa box while your maf is around that area should net you 14.7 AFR's. so instead of using a fuel VE table to tune in your desired AFR outputs are rpm vs load you use something that seems easier imo. But I'm not the smartest person so we will see. plans though are to install the maf, wire the maf circuit into the ms2, build the correct inc table for tunerstudio, 1024 adc to grams a second points. maf will be placed post turbo. tune my speed density setup a little more because of changes in pipping, it litteraly changed the overall tune and has pissed me off. Makes me wonder if the resonace chamber ( airbox near tb ) has more behind it than just for quieting sound. I will leave the map sensor in for the turbo and probably look at using mafmap blend, once it starts hitting boost than I can let it take over for VE table, though it makes me wonder about some stuff in different altitudes. |
Originally Posted by dustinb
(Post 692791)
I can't really add much to this, but is there any reason why you're going to all this work fitting a differentn MAF onto the car when you could easily switch it over to MAP and get ride of the MAF altogether?
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Originally Posted by Techsalvager
(Post 692748)
olderguy whats the link for?
I see, unfourntaly I don't think that will give me the info I need. Thanks though olderguy |
yes but without knowing the voltage to grams conversion, I'll just have to see what happens
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Originally Posted by Techsalvager
(Post 693246)
yes but without knowing the voltage to grams conversion, I'll just have to see what happens
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bump this up, still looking for the idle grams a second of a 1.8.
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Why do you need to know g/s? Just install the MAF sensor and log it.
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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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Originally Posted by Joe Perez
(Post 826854)
Why do you need to know g/s? Just install the MAF sensor and log it.
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But if it's plugged in and logging, doesn't that tell you the answer?
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Originally Posted by richyvrlimited
(Post 922440)
But if it's plugged in and logging, doesn't that tell you the answer?
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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? |
Originally Posted by Joe Perez
(Post 922494)
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? Nothing, I;ve had the info for a while now, have a way to find out mass flow at various engines speeds\loads |
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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Originally Posted by triple88a
(Post 922500)
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.
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 |
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. |
Originally Posted by Joe Perez
(Post 922513)
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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