When I drag race I know that my rear psi is around 15-18 psi, but what about the front tires. What should I have them at?

 

What kind of tires are we talking about here?

 

The front tires are 255/50zr 16's. Basically street tires

 

If it's just bracket racing, then I'd just run them at regular street pressures. But if you run in class racing, and want to squeeze every last MPH out of the car, then I'd inflate to max recommended to decrease rolling resistance. But if that's the case, you'd probably be running skinnies in the front anyhow.