I am good for the 40 laps. I need the 10 laps to balance out the 20 laps of blunders. I totally agree with the 8mm rear tire limit. The wider 9mm limit accidentally let an A class Porsche 914 run in the B class. The list of real entrants for Le Mans has Group numbers that seem to denote at least the engine capacity but also maybe other factors. I do not think we should use the real Le Mans group numbers, but they are a good guide for figuring out a slot car for A or B modeling. See below:
https://www.juwra.com/car_classifications.html
Home > Specials > Regulations > Car classifications
The diversity of the cars that have been and are being rallied is staggering. Since small citycar is no match for a big engined sports car, how should different types of cars relate to each others and should there be equality rules? In early days there were rules that penalized cars with bigger engines but currently the principle is to divide cars in groups and classes to compete against similar cars rather than against all the other cars.
From 2011, classes are no longer tied to specific groups but rather are a mix of similarly performing cars from different groups. This results a quite an impressive list of classes, at least for time being until older groups are phased out.
Classes
Groups
WRC (A0)
WRC (2011): 1.6T engine with WRC kit
A1 S2000-Rally: 1.6T engine
A2 S2000-Rally: 2.0 atmospheric, Group R4 cars
A3 Group N car over 2000cc (former N4)
A4 RGT cars
A5 Group A car 1601-2000 cc , Super 1600 cars, R2C, R3C, R3T and R3D cars
A6 Group A car 1401-1600cc, R2B cars, kit car 1401-1600cc
A7 Group A car up to 1400cc, kit car up to 1400cc
A8 Group N car 1601-2000cc
A9 Group N car 1401-1600cc, R1B cars
A10 Group N car up to 1400cc, R1A cars
Since 1981, there have been two groups, N and A. These were introduced, alongside groups like B and S, to replace the original numeric groups 1 to 5 which were used in 1973-1981. To put it short, Group N is a standard car with very few modifications allowed whereas Group A is fully prepared racing car. Classes within group are based on cubic capacity of the car as follows.
Group N production cars
Group A modified road-going cars
Cubic capacity Group N Group A
1400cc or less N1 A5
1401-1600cc N2 A6 (incl. S1600)
1601-2000cc N3 A7 (incl. F2)
over 2000cc N4 A8 (incl. WRC)