who here can flow a MAF?
Thread Starter
Joined: Nov 2001
Posts: 10,018
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From: Virginia
who here can flow a MAF? and get output of grams per second vs. frequency graph?
i will send you a my stock maf and my o1 zo6 maf and a maf translator.
i would like for each to be flowed by themselves, and then each with the maf translators set at full rich. the y scale for the frequency i would like to have plotted in steps identical to ls1 edit
the idea is to put the new scale into edit and push up my calibration range closer to 512 at 11250.
thoughts comments? i may even buy one of those overpriced granitellis to try and if it doesnt go higher than the maft ill just send it back..
thanks.
i will send you a my stock maf and my o1 zo6 maf and a maf translator.
i would like for each to be flowed by themselves, and then each with the maf translators set at full rich. the y scale for the frequency i would like to have plotted in steps identical to ls1 edit
the idea is to put the new scale into edit and push up my calibration range closer to 512 at 11250.
thoughts comments? i may even buy one of those overpriced granitellis to try and if it doesnt go higher than the maft ill just send it back..
thanks.
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Re: who here can flow a MAF? I don't know if it would be this easy or not but, why couldn't you put it on a flow bench and use an Oscope to view the output at a given flow.
Can you lock a flow bench in at a given flow to get an accurate reading of the MAF output?
Then you could just put the numbers in excel and fit a curve to them.
ProM could probably do it for a small fee also.
John
Can you lock a flow bench in at a given flow to get an accurate reading of the MAF output?
Then you could just put the numbers in excel and fit a curve to them.
ProM could probably do it for a small fee also.
John
Re: who here can flow a MAF? I had my MAF for my 99' Z28 tested on a flow machine at Lockheed. It was an engineer that did it for me. He basically came back and said that simply polishing it and clear coating it would drastically increase the flow by about 30-40%. He also stated that the venturi in the center actually improved velocity and helped flow, which is contrary to popular belief from the bigger is better crowd. He stated that the design of the MAF's, is nothing really all that high tech, just a simple venturi. Most are cheap inexpensive castings.
TECH Apprentice
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From: Earth
Re: who here can flow a MAF? Can't you use this ricer mod...it's a lot cheaper and seems to offer wider flexibility
http://www.roadraceengineering.com/newafc.htm
http://www.roadraceengineering.com/newafc.htm
Thread Starter
Joined: Nov 2001
Posts: 10,018
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From: Virginia
Re: who here can flow a MAF? yea i heard you just need an 0scope and flowmeter and log the frequency vs cfm, then convert cfm to g/sec nothing crazy hard... just have to supply the sensor with voltage and find the wire outputting the right freq.
but this comming from a guy that has used an o scope like 3 times ever and never a flowbench..
adjusting the air fuel is not what im going for with this.. i want the stock computer to do that for me..
but this comming from a guy that has used an o scope like 3 times ever and never a flowbench..
adjusting the air fuel is not what im going for with this.. i want the stock computer to do that for me..
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Re: who here can flow a MAF? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MIGHTYMOUSE:
<strong>but this comming from a guy that has used an o scope like 3 times ever and never a flowbench..
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's 3 more times than me. <img border="0" title="" alt="[Razz]" src="gr_images/icons/tongue.gif" /> Check your email. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
John
<strong>but this comming from a guy that has used an o scope like 3 times ever and never a flowbench..
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's 3 more times than me. <img border="0" title="" alt="[Razz]" src="gr_images/icons/tongue.gif" /> Check your email. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
John
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Re: who here can flow a MAF? Hmm, I wonder why clearcoating it would help. I would think polishing it would do just fine, but interesting he said clearcoating it would help???
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Re: who here can flow a MAF? What you need (besides a flow bench you trust)
is just a 5V supply and a frequency counter.
Forget the 'scope, unless it's a newer fancy
one that'll give you a frequency measurement
off the waveform. The frequency counter is a
whole lot more direct. You can even get a
$89 DMM at Radio Shaft that has that function
now.
Hell, I'd like to get one of my spare MAFs
calibrated too, then I could make a flow
bench of my own. Pressure gauges are
everywhere, it's the flow value that's hard
to come by.
is just a 5V supply and a frequency counter.
Forget the 'scope, unless it's a newer fancy
one that'll give you a frequency measurement
off the waveform. The frequency counter is a
whole lot more direct. You can even get a
$89 DMM at Radio Shaft that has that function
now.
Hell, I'd like to get one of my spare MAFs
calibrated too, then I could make a flow
bench of my own. Pressure gauges are
everywhere, it's the flow value that's hard
to come by.
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
Re: who here can flow a MAF? hmmm mantenance at my work has a freq. meter.. wonder if an almost dead 6v battery would work for a supply? and then i need a flowbench.... thats the easy one :/
10 Second Club
Joined: Nov 2002
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From: Berkeley, California
Re: who here can flow a MAF? It might be easy to construct a special purpose flowbench for calibrating MAF sensors. You should be able to use a MAF with known calibration to calibrate an unknown MAF. If the two MAF sensors are connected in series then airflow will be identical in both. You could generate variable airflow with a shopvac and a throttle body and some plastic pipe. I would use a stock 85 mm MAF as the reference.
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Re: who here can flow a MAF? You could use a 16"-18" electric fan(2000-2500cfm) mounted to a sealed plywood box with a piece of PVC coming out the opposite side. Then hook the MAF to the PVC with a rubber plumbing coupling. Then hook another piece of PVC to the back of the MAF. You could use an anemometer sealed to the end of the PVC to measure airflow in CFM.
Anemometer - Just an example
http://www.testequipmentdepot.com/extech/pdf/451189.pdf
Is the MAF on the car powered up when the key is turned to the ON position?? If so then you could get a short MAF extension harness and plug it into the MAF in the "flowbench". Turn the key to ON and use atap to monitor the frequency output of the MAF(If that is an atap option??). If not use the DMM that jimmyblue talked about to monitor frequency.
The fans could be powered off a battery or AC/DC converter. The flow could be varied with a speed control on the fans or with the inline TB idea.
Just some ideas. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
John
Anemometer - Just an example
http://www.testequipmentdepot.com/extech/pdf/451189.pdf
Is the MAF on the car powered up when the key is turned to the ON position?? If so then you could get a short MAF extension harness and plug it into the MAF in the "flowbench". Turn the key to ON and use atap to monitor the frequency output of the MAF(If that is an atap option??). If not use the DMM that jimmyblue talked about to monitor frequency.
The fans could be powered off a battery or AC/DC converter. The flow could be varied with a speed control on the fans or with the inline TB idea.
Just some ideas. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
John
