Building A Homemade Flow Bench

Start with a reading on the manometer with the plate completely blocked off for a zero flow depression test.

Building a homemade flow bench.

Owning a flow bench has become easier cheaper and a lot more versatile with kits that are available from flow performance. To flow a head you. The diy flow bench is a basic system to measure and display volumetric air flow. It is and has been for decades an invaluable tool to any one interested in increasing the performance of combustion engines.

Building a motor controller severely increases the complexity of the project but gives more possibilities for convenient automated testing and more importantly consistency. Flow is not everything. A flowbench or air flow bench is a tool to measure the air flow capabilities of anything that s required to do this. 2007 sbn a drag week winner first only sbn a car in the 9 s till 2012.

I have calibrated this bench using my machine shop s superflow as the standard. I regularly have the shop check the flow on one port of a customer s head just to make sure nothing has changed. Make sure your bench is sealed so no leakage takes place except through the test piece. Establishing the numbers step 1.

Generally most diy flow benches modify flow rate by using a manual valving system. Diy flowbench design diy flowbench design and construction what s a flowbench. Make the port right and the flow is the flow. Open the 5 cfm orifice.

The flow bench is used as a tool for measuring and quantifying modifications and improvements made to items such as automotive cylinder heads and carburettors by detecting air flow improvements. I have a head flowed by them then put the head on my bench and adjust factors in the calculating tables to get the same readings.