Drove the car 90 miles to Eureka, ran down the track 8 times, and drove home without any hiccup and calling that a win. The car was quite slow, but got some good data running down the track.
The engine seemed to like 36º timing, it slowed down at 38º and 34º, liked to shift at 5,200rpm and slowed down when trying to wind it up to ~5,600rpm, and it liked about 40% throttle at 1,600rpm at the line for the best 60ft. I ran it around 13.0 AFR as best I could across the board. I had one lean pop running a bit leaner than that, and started as rich as 11.0 when I got there and progressively leaned it out.
The plan I followed was, first three passes I adjusted the shift point RPM with a bit of leaning it out, leaving timing at 36º, the next two passes I leaned it out incrementally, one more with more rpm (and slowed down), then tried 2º more, then 2º less timing and both slowed down.
So the numbers. Eureka Airport Elevation: 5,954 ft Temperature ~93ºF Density Altitude according to the Airport computer: 9,100 ft.
My best ET and MPH were on the same run at 18.345 seconds at 77.13 mph with a 2.095 60ft. My best 60ft was 1.983 on a different run. After my third run, I really wanted to hit that 17.9 =P But I think that 9,100 foot air put a stop to that =P
Extrapolating from the Wallace Racing calculators I get a corrected 16.23 seconds at 86.65 mph, for a corrected 174.54 HP, which is about spot on for the low compression 1bbl engine's OEM rating.
I'm going to re-look at the cam timing and may even stick the slightly smaller 1bbl cam back on the engine as it could be a better match for the compression.
In any case, I have a successful day going down the track and have a baseline to start with! And that nearly 10,000 foot air sucks!
