In the world of Le Mans, 'GT' means, race-cars, loosely based on production sportscars. We are going to look at the GT1 class in this piece, with GT2 class tomorrow. A GT1 car runs at 1125kg (Corvettes & Astons run 25kg heavier) with a maximum engine capacity of 8 Litres for Normally aspirated engines or 4 Litre for Turbo charged cars. Budgets