The teams bring enormous amounts of equipment to each race. Obviously a lot of that equipment is wrenches, screwdrivers, and related machinery. But every team is bringing essentially a portable datacenter to each race:
The car has around 300 sensors and the SECU monitors over 4,000 parameters. During the course of a typical race the car will transmit around 3 GB of telemetry data as well as around 4 GB of logging, however this is just the seed for computation. When processed and combined with other sources such as audio and video analysis it can mean a team leaves a typical race weekend with over a terabyte of valuable data — data that is drawn on again and again before and during future events and seasons. -- https://www.eetimes.com/the-importance-of-electronics-in-for...