Air flow/mass meter tinkering

[Mr Whippy]

Well my derv has an air flow thingy that see's how much goes past.



Now I've read here and there that removing the grille can decrease turbulence improving intake system drag, but also that it can alter the reading, although the flow of air in total is not altered.

Has anyone got any idea if removing it will make it think there is more air, or less air?

Just thinking of cheap and easy ways to up the fuelling a bit more (again, is a derv, so it'll just richen up and not fry my engine)

Probably going to buy one just to see, because they are so cheap anyway, but interested to see if my theory is right to start with!

Dave

[Mr2Mike]

Mr Whippy said:

Now I've read here and there that removing the grille can decrease turbulence improving intake system drag, but also that it can alter the reading, although the flow of air in total is not altered.

If the total airflow is not altered, then there is no point in removing it!

[Mr Whippy]

Total airflow isn't altered, but the reading that it gives may well be due to alterations in the turbulence.

Ie, the device is calibrated with turbulence, taking it away would maybe alter the reading?

Not after more air flow, I'm after subtly altering the fuelling, even by 5% across the board for a bit more grunt

Also probably some reduced pumping losses due to the reduced friction. That mesh is very dense and must generate tons of turbulence...

Hmmmmmm...

Dave

[GreenV8S]

I expect it's something that'll vary depending on the type of AFM and also how it's installed, but I've been told that the mesh on the Lucas meter helps stabilise the air flow resulting in a more consistent reading.