xkuntrycowboyx said:how do you convert that... is there a formula?
Yes there is. I used to have that calculator also and now I lost the website.
I went 145mph all stock with 3:55 gears. Needle was still going forward at a regular paste so lots left in it. Although my tires were kinda bald and I was with somebody else so I didnt want to put her in any greater danger. Also if you get caught with that kind of speed around here, you automaticaly lose your license. Not sure about the law for the US though..