Tractorsport Flowbench Forum Archive

Posted: **Tue Feb 17, 2009 4:49 am**

Hi!
I am trying to figure out at which temperature the standard CFM is measured.

I use a calculator () to get my calibration flow plate numbers. The CFM changes with the temperature, so what is the correct standard temperature to use? If i use the incorrect temperature, the readings should be slightly off.

Thanks Gordon

Posted: **Tue Feb 17, 2009 9:33 am**

Temp: 70F
Baro: 29.92

This is what I use

Posted: **Wed Feb 18, 2009 11:01 pm**

Gordon, Per the 1976 US Standard Atmosphere, the SL standard day is 59*F. However, not every industry uses the US Standard, so

Doug

Posted: **Thu Feb 19, 2009 3:45 am**

Thanks for the replies!

I have seen a youtube clip from A VW tuner , after 30s they show their program, the flow is displayed as SCFM, standard CFM I guess. I have also seen a flow diagram from there, and it displays both ACFM and SCFM.

Then I guess I should get the standard CFM values for my plates then.

I havnt herd much about wich standard that is used before. If I dont have a standard to follow, its hard to be accurate with other benches out there!

Thanks Gordon

Tractorsport Flowbench Forum Archive

Standard temperature for flow readings