I'm not sure about that exact system, you'd be better off contacting them directly to check. Our local club runs an iRace system, similar IR setup and they state you can have up to 50 cars per race: https://www.kamtec.co.uk/p/irace-lap...d-complete-set

Its worked flawlessly for years. Transponders are cheap enough to have quite a few handouts if we run bigger meetings, plus racers dont mind buying them due to the price.