Disappointing dyno results

Well. Only suggestion I have is to compare to look for differences.
No way it should be that different run to run.

1. Possibly running on 7 cylinders
View attachment 1716142672

2. Discovered Running without 1 spark plug. new test on all 8. 600 rpm/sec
View attachment 1716142673

3. Next day, no changes known. Air consumption way down, VE way down at the upper end.
View attachment 1716142675
I think the second test here is going to be close to where it ends, a little more by getting the A/F and timing dialed in, pretty close to factory #'s.