Posted: Tue Oct 13, 2009 5:36 pmHey guys, how about any feedback or math help with this part of my project. I am trying to get some ideas rolling as I progress with this "monster" of a bench setup.
Water flow amounts, to measure and how much.
OK, first off, the math. This is what is in my head now. A simple way is to convert the head CFM to LBS/hr, then divde the AF ratio to get my LBS/hr fuel/liquid. I know the differences with water to gas, but just want to nail down math and what will cross reference between running and static. OR, do I have to do something different in regards to BSCF as a whole engine number and then divide up the cylinders....(?)
Second. I was looking at Dwyer's flowmeters which are not too expensive. I wish I knew how to build my own. I have a pump and could set up with a regulator with a testing bypass to set a particular amount of liquid. Thats the easy part. The harder part would be how to change volume amounts without changing discharge pressure using the same "spraying" outlet port. I don't want to see tests scewed because the discharge is different based on trying to get more fluid to the test piece. I hope you guys kinda get what I am saying. All this is just in the "drawing board" stages inside my head.
Now, lets say I have to jet something at the discharge. Carb boosters were brought up, but the draw based on signal strength. Even though there is pressure behind it, well, you know how different motors react with carbs. How about one NOS fogger nozzle. How will it work without the 900 psi from the NOS? How about this, what do you guys think if I were to pressurise a resovoir (spelling?) at 150psi from the air compressor with the fogger nozzle in place?
I will leave it at that for now. I am sorry if my thoughts are all over the place. I will appreciate any feedback
Water flow amounts, to measure and how much.
OK, first off, the math. This is what is in my head now. A simple way is to convert the head CFM to LBS/hr, then divde the AF ratio to get my LBS/hr fuel/liquid. I know the differences with water to gas, but just want to nail down math and what will cross reference between running and static. OR, do I have to do something different in regards to BSCF as a whole engine number and then divide up the cylinders....(?)
Second. I was looking at Dwyer's flowmeters which are not too expensive. I wish I knew how to build my own. I have a pump and could set up with a regulator with a testing bypass to set a particular amount of liquid. Thats the easy part. The harder part would be how to change volume amounts without changing discharge pressure using the same "spraying" outlet port. I don't want to see tests scewed because the discharge is different based on trying to get more fluid to the test piece. I hope you guys kinda get what I am saying. All this is just in the "drawing board" stages inside my head.
Now, lets say I have to jet something at the discharge. Carb boosters were brought up, but the draw based on signal strength. Even though there is pressure behind it, well, you know how different motors react with carbs. How about one NOS fogger nozzle. How will it work without the 900 psi from the NOS? How about this, what do you guys think if I were to pressurise a resovoir (spelling?) at 150psi from the air compressor with the fogger nozzle in place?
I will leave it at that for now. I am sorry if my thoughts are all over the place. I will appreciate any feedback
Perhaps you could reverse math the amount of fluid injected for wet testing for the ratio needed since you know the mass of air at 28" wc and you want to simulate a certain A/F ratio. The trick would be to get the injector timed for that Y amount of wet mass to produce the desired simulated A/F ratio. Using water which then has a different density you would have to figure out a correction for the true amount you inject. Looks very challenging.