[Tom Vaught]

One other point Stan.
You are used to seeing Superflow Data, most likely, read with a Turbine Meter.

Turbine Meters just measure the engine air based on a calibration from Superflow for where the Dyno is installed and then they have 'Correction Sheets' that are supposed to give you a rough airflow number. It is assumed that the Pressure in the cell is based off of a Sea Level Test Pressure of 29.92 Hg or 101.325 kPa and 59 degrees F temperature.
So these correction sheets are supposed to get you in the ball park after the math is done.

The Research Cells are calibrated based on "agreed upon" Scientific Numbers based on CODATA Research.

That number for pressure has changed basically from the old 1980s 101.325 kPa number to the 100 kPa number used in the last few years. Same deal for the Temperature number.

Many years ago it was agreed to that a "pound" would be some percentage of a Kilogram. They had a Master Kilogram (stored in Europe) (that all the other Kilogram measurement standards were based off of). Kind of like having a Master Holley Carb and its calibration. Do the other Dominator Carbs match the Master Dominator Carb's numbers?

So any number that you would want me to give you would not match up with your Superflow numbers because even the numbering system and what the calibration base number reported is would be different vs our Research Cells.

If you want to read more about this here is the link. April 2019 is the change over date for the latest CODATA standards.

https://www.nist.gov/si-redefinition/meet-constants

Tom V.

[Stan Weiss]

Originally Posted by Tom Vaught

One other point Stan.
You are used to seeing Superflow Data, most likely, read with a Turbine Meter.

Turbine Meters just measure the engine air based on a calibration from Superflow for where the Dyno is installed and then they have 'Correction Sheets' that are supposed to give you a rough airflow number. It is assumed that the Pressure in the cell is based off of a Sea Level Test Pressure of 29.92 Hg or 101.325 kPa and 59 degrees F temperature.
So these correction sheets are supposed to get you in the ball park after the math is done.

The Research Cells are calibrated based on "agreed upon" Scientific Numbers based on CODATA Research.

That number for pressure has changed basically from the old 1980s 101.325 kPa number to the 100 kPa number used in the last few years. Same deal for the Temperature number.

Many years ago it was agreed to that a "pound" would be some percentage of a Kilogram. They had a Master Kilogram (stored in Europe) (that all the other Kilogram measurement standards were based off of). Kind of like having a Master Holley Carb and its calibration. Do the other Dominator Carbs match the Master Dominator Carb's numbers?

So any number that you would want me to give you would not match up with your Superflow numbers because even the numbering system and what the calibration base number reported is would be different vs our Research Cells.

If you want to read more about this here is the link. April 2019 is the change over date for the latest CODATA standards.

https://www.nist.gov/si-redefinition/meet-constants

Tom V.

Tom,
That is one way, but as you say those turbine can / do have problems. Another is to take two other measured quantities like A/F ratio and Fuel lb/hr and calculate Mass Air lb/hr. Now I can calculate BSAC using Mass Air lb/hr just like I calculated BSFC using Fuel lb/hr.

All that said, one problem I have seen is that fuel specific gravity is not entered correctly and that causes all kinds of funny numbers.

Stan