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Mass Air Flow Sensor  

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(@captndiet)
Member

Has anyone considered using a mass airflow sensor to log cfm on an engine dyno ?

It appears the Bosch MAF uses 0-5v .

I would use for 10-30 hp small engines.

Jeff

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Posted : 12/02/2020 5:02 pm
(@admin)
Member Admin

Hi, seems no answer from anyone here, but if it gives our 0-5V it should be possible to use!

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Posted : 19/02/2020 10:24 pm
(@captndiet)
Member

I asked just to see if anyone had tried it.

Looks like I am the guinea pig.

I attached a page of info in case anyone in the future wants to try.

 

Jeff

 

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Posted : 19/02/2020 10:54 pm
(@captndiet)
Member

When I get the time to mess with this, I will wire it up and put it on my flow bench to determine what the cfm is at a given voltage.

 

Jeff

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Posted : 19/02/2020 10:58 pm
(@mach_1)
Member

Hi Capndiet ,  Can i ask a silly question ? What are you going to do with this cfm data ?

Are you going to measure fuel weight/flow as well ?

Cheers

This post was modified 1 week ago by Mach_1
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Posted : 20/02/2020 4:07 am
(@captndiet)
Member

On single cylinder engines they have a massive amount of reversion in the intake tract.

The MAF reads zero flow at 1 volt and do read negative flow below 1 volt.

In theory, it might help me design intake manifolds to help minimize reversion.

or

It will give me a bunch of useless information.....

Jeff

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Posted : 20/02/2020 5:47 pm
(@mach_1)
Member

@captndiet

Hi Captndiet , It all depends how you analyse the information.
Getting the intake and exhaust pressure wave timing correct is crucial , if incorrect can be a engine power robber!
Get yourself a copy of PipeMax worth every dollar you spend on it. Join the forum Larry Meaux's PipeMax Header Design software at www.maxracesoftware.com
The software will do all the necessary mathematical calculations for you it is staggering the amount of information you will have at hand.

 

 

This post was modified 1 week ago 3 times by Mach_1
ReplyQuote
Posted : 20/02/2020 11:21 pm
(@mach_1)
Member
This doesn't come cheap have a look TFX Engine Technology Inc.
Cylinder Pressure Data Loggers/Analyzers https://www.tfxengine.com/
Nitro2 is "Clint" and owner of TFX Engine Technology Inc.

You will have to join www.speedtalk.com forum to read some of these threads,
if you not a member I strongly recommend you join the forum worth a read.
Here are a few threads to give you brain overload information. HAPPY READING.
 
Use the "search" feature of the forum heaps of useful information that is priceless there are
some very intelligent and  knowledgeable people in this forum sharing information and ideas.
 
Exhaust Port Pressure Traces - 4" Stub vs. 4-2-1 vs. Custom
https://www.speed-talk.com/forum/viewtopic.php?f=15&t=31606
 
 
Pressure Analyzer Info Related to Small cc and Turbo Engines
https://www.speed-talk.com/forum/viewtopic.php?f=15&t=27441&p=317943#p317943
 
 
 
 
ReplyQuote
Posted : 21/02/2020 12:15 am
(@captndiet)
Member

Well, I really wish you had not shown me the TFX info.......

Guess I better call them.

Jeff

ReplyQuote
Posted : 21/02/2020 1:10 am
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