Places for the SpecialEffect Challenge - a race from Oxford to Le Touquet in France and back again - have been extended following overwhelming demand.
The race takes in iconic circuits Brands Hatch, Le Mans and Croix En Ternois, with teams entering cars that cost no more than £500 while raising money for video game charity SpecialEffect.
"The emphasis is firmly on fun. It's much more than experiencing the racing circuits," said organiser Brendon Cross, MD at STL Communications.
"As it's a points-based challenge rather than a race, we'll be keeping the teams on their toes with plenty of outlandish non-motoring mini-games during the four days. We are looking forward to giving extra points for fancy dress and themed cars. Teams whose cars don't make the distance will be transferred to The Bus of Shame, which will accompany the event."
More information on the event (which takes place 23-26 May 2014) and applications for a place on the race can be found at the official website.