Im male 170 lb. 5'9. how many hours do i wait to blow a zero on a breathalyzer test after drinking 8% alcohol beer...2large ones?

It depends: how many ounces were in each beer? Everyone metabolizes alcohol differently but a general rule of thumb is that it takes approximately one hour to metabolize 12 ounces of a 4-5% beer.

The average person: metabolizes 1 standard drink per hour. It the drink is larger or stronger than usual more time would be required. You mat want to allow at least 4 hours to get to 0.