Originally Posted by fast68plymouth
A friend of mine bought a used motor Monday, had it on the dyno Wednesday, it’s in the car at the track today.
Motor dynoed at 728hp.

There is also a slight head wind(8-9mph) at the track today.

The Moroso chart shows 665hp for the speed(144), which is within 10%(8.7%) of the dyno numbers.
It shows 695hp for the ET (9.21) which is within 5%.

Wallace shows:


So if you applied the 1.05 correction factor to the Moroso # 695 X 1.05 = 729 ??

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5