See that on all my dyno sheets. Old and newer. I don't think it's an Hg type reading. I believe it's a PSI thing, but I honestly don't know. Look to me like its a negative number. I know it isn't erroneous whatever it means. It's a DTS dyno. There are many readings you can choose to be in those columns. That's just my guy's preference, I guess.
Correct, they will always be a negative value if You're not boosted, but intake depression is usually measured in "Hg. If that were indeed pounds that would be an exceptionally
high amount of depression,i.e. restricted at the carb...........I believe for the HP950 it works out to a normal DP rating of 830 or so, I'm inclined to think the chart column is
headed incorrectly.....................if not then the carb definitely was choking the engine at over 3"Hg......I believe You did confirm it was opening 100%?
