DIY Motorcycle Engine Flow Bench

This engine flow bench is based on the design presented by pingu393, see link below. My original flow bench had a problem of air cavitation when I simulated valves closed. But when I simulated cracking the valve open my manometer went the wrong direction and indicated MORE suction. The design by pingu393 solved this issue so I took his design and pared it down to a more manageable, streamlined tool.
• Build Your Own Flow Bench
Key Words: Engine tuning, Port and polish, Head porting. Motorcycle 4-stroke
Music- "Access Time" by Sound Idea

[@GPZ_Biker]

Do you have a video of it in use, and how you used it? Itbwould be really interesting to see that. Thanks

[@ronporteous1411]

Excellent suggestion. I'm currently working on a HONDA Xr100 big bore installation video. I'll do the flow bench video after so subscribe to my channel and you'll be informed when I post it.

[@GPZ_Biker]

​@@ronporteous1411great. Will subscribe. Thanks

[@David-tv3mg]

Are you saying this basically replicates the flow box with the main plenum and measuring plenum that was shared in the other video you recommended watching?
I’m doing major fabrication work to an existing head and need to know if it made any improvements.

[@ronporteous1411]

This flow bench is the tool you need to verify the changes you make in your engine cylinder head. I am in the process of making a video explaining how it is used to compare before and after changes made in the head ports. The nice thing about this machine is it can be created using inexpensive plumbing parts and an old vacuum cleaner. I recommend you obtain the book "How to Port and Flow Test Cylinder Heads" by David Vizard for a better explanation of the process.

[@David-tv3mg]

@@ronporteous1411awesome! That’s exactly what I’m needing it for. Thanks so much for sharing! Can you provide everything else you used to get the flow readings that you mounted on the wall above?

[@ronporteous1411]

@@David-tv3mg It's just PVC and clear tubing with colored water. I purchased the adhesive-backed measuring tape from Amazon along with the tubing. I think I used 3/16 ID clear plastic tubing and obtained the fittings from the Home Depot. The rest is stuff I had littering the lab. I have a crude detail of the manometers but can't figure out how to send it to you through this medium. Try contacting me through Facebook, I think I might be able to get the details to you there

[@David-tv3mg]

⁠@@ronporteous1411 I think I found you on Facebook and sent you a message. Thanks again!

[@ronporteous1411]

Did you get the information you needed?@@David-tv3mg