TF & Speedmaster Flow Tests

PRH said

I wonder if……..
One were to rework one of the SM ports to a lesser extent than what’s been tested so far, concentrating primarily on getting SSR area sorted out so that it would allow the flow to show increases past .600 lift…….even if the flow capacity at those lifts is below the current 285cfm level.
Say you got [email protected]……….would the flow in the areas(6 o’clock, etc) where it’s next to nothing now……..still be next to nothing?

At the other end of the spectrum, I wonder how one of PBR’s non-stalling 300+ cfm SM’s would compare with that test.

Click to expand...

Without increasing the size of the valve, any major gains would have to come from areas like 1:30, 3, 4:30, 6, 7:30. 10:30 is maxed out, 12 and 9 are pretty busy as well. David Vizard talks a lot about leaning/biasing the port for more flow at high lift. Seems to me that is just trying to push more air through the 10:30 position, which is already doing the lion's share of the work.

So, I think you are correct that the key is areas like 4:30, 6 and 7:30 if the SSR can be fixed, and areas like 1:30, 3 and 4:30 if shrouding can be reduced. I certainly have not figured out the SSR but I am trying to figure out a system to measure what is going on. There's an old saying in process control "If you can measure it, you can manage it".

I'm chuckling that you place my SSR on one end of the spectrum and PBR's on the other. You are correct. No offense taken. We are blessed to have him around.