What is the collective noun for racing cars?

There isn't a single, universally accepted collective noun for racing cars. However, here are some options depending on the context:

General terms:

* A field of racing cars

* A grid of racing cars (referring to the starting lineup)

* A fleet of racing cars

* A pack of racing cars (when they are close together)

* A gaggle of racing cars (a playful and informal term)

More specific terms:

* A squadron of Formula 1 cars

* A stable of Indy cars

* A pack of NASCARs

Ultimately, the best collective noun will depend on the specific type of racing cars and the context of the sentence.