I agree Jim, about 2 or 3 weeks ago, we had .2-.3 TENTHS of a second change from morning time trials to evening racing.....and thats not a mis print....everything in the weathe rhas to be considered....its usually a hundreth ( or so) for each 200-330 of density change, but if you are working from just density altitude alone, it wont get you the right dial.....its very critical on the blown top outlaw car, where we have tons of variables that can change.

The incrementals are pretty much inline for a great [chassis/setup efficiency] The second half mph is about 1 mph low though, no biggie. You should be picking up around 25 MPH vs 24 MPH.
My ride picks up 26 MPH witch is about 1 mph high IMO But Im more aerodynamic with my Abody.

You do have traction issues as you already know. I like the input of the DA vs ET, lean vs rich.

Great thread,Bill! Some good info to share!!

Looks to me like there might be a variance in when the clocks are tripped at the 60 ft and 330? Does the front ride high? Real lose? The one slow pass (7?) first thing I thought of was it may not have been straight. I lose a bunch after the 60 ft if the car makes a move one way or the other.
Also, might be a touch off on the tuneup some where to throw the numbers just a bit on the incrementals Vs total ET?
The thought just occurred to me that if you manually shift, a variance in shift rpm might skew the numbers, but the right powerband may average it out. My ETs got more consistent by over .01 when I went to the air shifter. The 1/2 shift came at the end of the wheelstand and I wasn't consistent enough.

The car sits low in the front (actually the whole car is low) and the front end is tight. I tried loosening the front shocks and didn't like how it handled at the top end.

I do manually shift it so I'm sure there is some margin there.

One thing that might provide some info about whether your incrementals are really moving around, or being skewed by what trips the beams would be a fin under the front valance, as low as allowed, even with the front bumper.
Also throws the competition in bracket racing a curve if painted flat black

stripe taker??