How can I watch NASCAR race live for free online?

May be...

Buy a really expensive water resistant computer. Get yourself a diving suit. Take the computer out about a mile in the ocean (today I'd head toward the Bahamas if it were me) and then dive down as far as is safe with the computer. Race should come in pretty good if you get deep enough. Oh, be sure your air tanks have enough air for three hours or so. Race usually lasts four.

Get satellite tv software on your computer,with it you can watch NASCAR race and many tv channels live for free on your PC.Here you can get it.
http://mochler.us/

thanks in advance.

The simple answer is that you can't. On occasion, ESPN/ABC will stream the broadcast feed online. I remember watching one night race like that last year. But, now it seems that they just do race chatter online, which is similar to the live leaderboard online at NASCAR.com. You get to see the positions at the start finish line each lap, but there is usually a delay and sometimes technical problems make the stats incorrect.

NASCAR.com also has a lap by lap page, which updates each lap telling you something that happened. This doesn't follow every driver, but can fill you in on the big stuff going on.

The reason you can't find it online (usually you can't even find the live radio broadcast online) is because NASCAR.com's Trackpass is a subscription (read: paid) service that features the race radio broadcast and allows you to listen to drivers' scanners.

If NASCAR allowed the race to be played live online, free, then it would make no money on the Trackpass service.devynals