Prestage.com has ......a page where u enter ur 1/4 mile..trap speed......and weight...and it spitts out ur drive wheels hp.........
Has nebody found this to be fairly accurate?......
I tried it for my car and it came up with some crazy numbers...that i don't think could be true......

 

That thing is severely off. My trap and vehicle weight says I'm putting 215 to the ground. I've dynod multiple times at 182-184whp. Its off by like 15%

 

whp estimates by those cheesy things aren't accurate for your ET. It's much more accurate if you use your trap speed.