Racing flow benches

PRH said

I’m not sure if I was clear in the first post......
The two sets of numbers are the same port, on the same head....... tested on two different benches.

The flow bench is a tool to gauge your progress.

Flow it before you start working on it....... make changes..... see if it helps or hurts.

The numbers don’t need to be absolutely correct to be valuable....... but they do need to be repeatable.

Click to expand...

This happens all the time.
People either misinterpret or just read out of it what they want.

I flowed the same port on two different benches... The other gave better .100-.400 lift numbers by about 6cfm and flowed the same peak but by maybe .030 lift earlier.
My thinking is unless they use the exact same module/hardware/manometers that the only diff left is the operator, bore size and its alignment, blower motor winding milage.. just a few things. Lol