One more, this time showing the 1.59 annular vs the 1.52 downleg carbs... neither of which are really dialed in at this point.

That looks like a toss up. The 1.52 is a little choppy but that could be due to something else. Sometimes a dyno pull just gets choppy for some reason. How much air was the engine using during the pulls? 800 cfm or thereabouts?

Peak airflow #s ranged from about 880 to 900, depending upon carb & spacer combination.

Did you get all of the data in a .txt file so you can dump it into Excel? If so then you can look at avg power for different runs and area under the curve. Those will tell you if you have any difference or not between parts.

Nope, just standard printouts. Any data analysis requires me to fat-finger it all in.

There might be a way to export the files. Worth checking on since I'm sure you'll want to play with that info. The dyno software we use has an option of outputting the file in .txt format which you can then read into Excel. Makes it really nice for analysis.

My fingers need the exercise.

Can I ask what the BSFC numbers look like?

On the sheet I'm looking at, they start out in the very low .4's, and start creeping upward into the mid-4's at around 5800rpm, then into the upper-4's at 6800 till the end of the pull(7200).

In hindsight, I think a jet change might have been a better move than an air bleed change.

Yeah... but we were out of time... and I was about out of $$$.

We did what we could in the amount of time we had. Still learned a lot, just a few more take-aways to follow up on than I probably expected.