Question too those, who work with flowbench

Hallo,
I have build my own flowbench for home use. It is not the perfekt one, but the bench is well adjustable and I can messure up to 300 cfm at 28" of water.
I only have on thing, what make me a little nervous.
If I open the valve up to 0,5" the testpressure is going down with every step of the lift and I have to close the bypass a little to adjust the testpressure.
But when I open the valve from 0,5" too 0,55" and to 0,6" (ported Trick Flows), the testpressure is not going down any more, it is instead of this going up a little, and therefore I have to open the bypass a little to adjust the testpressure.
The velocity i not going down, it is getting up.
Did you have the same experiences with professional flowbenches, or is this only with my flowbench????

Thank you for your help
Hans

I think you would find more flow bench operators on Speed Talk: Interviews - Racing Books - Racing Forum. Could you give us more info? I'm curious how you built this thing.

Hallo,
I am happy that you are interested in my "work".

The link is to a other forum. There you see some pictures from the flowbench.

dr-mustang : die us-car community › Forums › Technik › Racer Forum › Flow Bench - wenns einem mal langweilig ist


regards
Hans

You might want to check out this site. It has tons of info on flowbench's and very knowledgeable people on the board.

Flowbench Technology