Anyone know the range of an average MAP sensor? Wondering what I could use for my DIY flowbench.

Will they give readings from 1 bar?(atmospheric not boost)

What sort of vacuum will be seen in a normal petrol car manifold?

How accurate are they? I would imagine there wouldnt be much pressure difference in my flow bench. I guess I could use an orifice to up the vacuum but want to avoid this to have the cleanest flow going into the ports.

you only need 2 mountable parts

where in you fit the map sensor.

a engine sees negative pressure from 0,3bar to 0,8 on tickover saying that it will depend on allot of things...

peak pressures i donīt know..

the sensor will has an accurancy thats the same as what you could read.

you only need to do your measurements on a stable pressure and then measure the loss in pressure..

the formula will tell you that the lower pressure you do your measurements with the better you get a difference...

Tks

On a N/A engine, 15-115 kPa or 15-105 kPa (absolute pressure!) is a normal range. If you use automotive sensors, they are probably more accurate then your flowbench ;-)

I've experience with the GM ones (see: linky to sensor this shows the 3 bar version, but older vuaxhalls should have this sensor in 1 bar version.) If I recall correctly these are 0Volt @11kPa and 20kPa/Volt from there.