how accurate is that? i just calculated my time and this is what it gave me.
Stock and Mildly Modified Naturally Aspirated Engines
13.663 @ 99.405 MPH

Extensively Modified Naturally Aspirated Engines
13.892 @ 97.667 MPH

Extensively Modified Supercharged and Turbocharged Engines
14.232 @ 95.399 MPH

 

I don't know much about it, but I'd guess it's just like any other calculator. There isn't one that is going to be 100% accurate for every situation, but it's likely close for a majority of situations. I'd like to know if anyone has more info as well.

I really don't fit into any of the three choices. My truck isn't extensively modified (IMO) but it has a supercharger strapped on. This is what my time from last night converted to:

Stock and Mildly Modified Naturally Aspirated Engines
12.785 @ 106.65 MPH

Extensively Modified Naturally Aspirated Engines
13.043 @ 104.406 MPH

Extensively Modified Supercharged and Turbocharged Engines
13.465 @ 101.328 MPH