A Test & Tune (TNT) is a non-competitive event at drag strips for drivers to get seat time and dial-in their cars, while a Gamblers Race is a low-buy-in, high-payout race-within-a-race, often featuring bracket-style or index racing (like 530 index) with a fun, cash-prize format, with both events frequently held together to offer maximum track time and a chance to win money before formal competitions

. Drivers pay an entry fee for TNT to make passes, and an additional fee for the Gamblers Race, often with separate tech/rules, allowing participants to test setups during TNT and then compete for cash in the Gamblers event.