Racing flow benches

PRH said

The main point I was making, was as PBR often says........
You need the “before” numbers........ from the same bench..... to really know how good the “after” numbers are.

To say a head flows “x”, without the proper context...... is just a number.
And....... it’s best to look at the whole curve..... not just the big number.

Click to expand...

I think you can see through the numbers once you seen enough and worked enough with a bench. Whenever I see some really high numbers that I don't ever see ..I just assume they're probably about 8 cfm lower in actuality. I don't believe any of us would literally "race another flow bench".
If I'm just close.. it's there enough for me in my filter of 'it's probably a little less than that'. Call me assuming, we all are sometimes. I know you played with the flow bench enough to move that cylinder head around and learn how important it is to line up that chamber on the straight side. Bore size and alignment can change the number drastically on a just fits bore adapter, like 4".
I think there are things the reader just doesn't understand Iike the operator does.