1974 Duster

Calculated hp 2 weeks ago = 250 hp (average between ET/MPH)
Calculated hp yesterday = 323 hp (average between ET/MPH)

Adding 18% for drivetrain losses, that works out to 380 hp or so flywheel which is in line with several dyno articles on the 5.9 with a good cam, intake and headers. 18% is a touch low I think as I know from a Chrysler engineer that 18% was observed from them going from a 300+ hp 2.2 on a dyno to in car testing with a manual transaxle, 20% with RWD and a auto would be closer I think.

Track was packed yesterday, I think we averaged about 1 pass every 1.25 hours and this was with me getting right back into staging after a pass.