No? I don't have a dakota digital gauge set up.

In the background of things I've been working on trying to make a reasonable attempt at checking the flow of these heads using my spare block and David Vizard's shop vac setup (http://www.musclecardiy.com/cylinder-heads/build-flow-bench-port-flow-testing-cylinder-heads-part-3/) and if I get reasonably repeatably result I'll see about having a cfm calibration plate made, but in the mean time I've wanted to work on a proof of concept as well as see if the $8 USB camera would work well enough to "watch" wet flow. Today's tests were interesting to say the least!

I'm still trying to figure out how to best seal the bottom of the chamber with the shop vac. My first, and only, test so far was with a cut up nerf foot ball with a hole sawed hole in the middle for the shop vac fitting. Because I wasn't looking for specific repeatable numbers yet I just stuck the camera cord through the hole too. When I got it reasonably positioned and turning the vacuum on I learned a few things. One it simply sucked the whole thing to the top of the chamber and two the test valve springs I am using are not strong enough and both the intake and exhaust valves are pulled off their seats. So I need stronger springs and to work on the seal still. The second thing I learned is the camera isn't quite good enough to see how water mist flows into the chamber when spraying water at the port. And the third thing I learned is when the shop is 10ºF, and the block and head probably is too, ice builds up! LOL! I'll call this a "COLD flow test" lol.


The test set up.


Now the ice may have been as much a blessing as a curse as it has there frozen the water (fuel?) spray direction/pattern.


So you can see why I opened it up on the sparkplug side of the intake valves (old photo).


I found it interesting that there was no ice build up on the cylinder wall side of the intake port or chamber. Basically confirms everything I've read.






A better view of the sparkplug. The ice had built up enough to keep the intake valve from seating.


I tried taking some video's of the water flow, but all of them have water hitting the camera and blurring out (possibly icing up the camera..). So I decided to put a cam housing on with a 1bbl cam in it and video the valve action. The chamber is already iced over but it's still kind of neat to see. The overlap between the intake and exhaust is very minimal.
https://www.youtube.com/watch?v=g8FAxhOTcx0


I've built a 8ft tall manometer with $15 worth of tubing and measuring tape and a spare piece 8ft white baseboard trim, but I won't put water in it until I'm sure of the rest of the test rig AND I know it won't freeze up!