All the HP in the world is useless without a good chassis, traction, and limited weight.
HP increase does not always equal ET improvements.
I've seen guy spend thousands of dollars on HP parts, only to run slower, or the same.
get it to the ground, and you'll really feel it.
The Mark VIII is "rated" at 280 hp. if you line up a mark VIII, with another car that has 280 flwheel hp, whoever makes the best use of that HP is going to run the better ET.
Find out what causes HP drag/loss, and you can go faster with less power.
...there's plenty more.
You can play with this if you want....but it isnt very accurate at all. Just calculate a loss of at least 20% loss of HP to the rear wheels. In the case of 350 flywheel HP, if it was a A/T car, you could use a estimated HP of 280(just an example)
according to its answers, I am making over 246 RWHP in my 4150 lb car.