I have been building and playing custom races lately. Today I played 1988 F1, Group A, Super GT 2008, and 2020 V8 Super Tourers.
These are the custom races I have set up to play with full or nearly-full grids of cars. There are only a few stand-in cars where GT has a weird gap in the car list (for example, BRZ GT300s for Prius GT300s). When I get the right liveries on everything, I will post pics of the whole set of custom races I’ve built.
-1959 GT
-1966 GT
-1970 Touring Lights (Alfa, Mini, Abarth, etc.)
-1972 GT
-1972 GT w/ Prototypes
-1967-1972 Trans Am
-1969-1972 Oval Stock
-1979 Classic Rally
-1984 Super Silhouette (650 HP no minimum weight based on Group 5 & AAGT)
-1988 F1
-80s-90s Group A Touring
-80s-90s Group A Rally
-80s-90s Group B/S Rally
-1993 Group C / GT Multiclass
-1994-2004 JGTC (GT300/GT500/Multiclass)
-1997 GT1
-2003 Porsche Carrera Cup single-make
-2008 Super GT (GT300/GT500/Multiclass)
-2009 GT1 + GT3 Multiclass
-2012 LMP1 + GT3 Multiclass
-2015 GT4
-2015 GT3
-2016 LMP1 + GT3 Multiclass
-2016 Super GT (GT300/GT500/Multiclass)
-2019 Super Formula
-2020 Modern Rally
-2020 V8 Super Tourers (750 HP modern V8s w/ 4 seats)
-2023 GT4
-2023 GT3
-2023 TCR
-2023 Super Formula
-2024 LMDh + GT3
-Red Bull Juniors single-make
-Civic TC single-make
-multi-make races that are a work in progress: Kei cars, Trucks, Concours cars, 90s DTM, Track Day cars, 1960s F1, VGT
-single-make classes that are still a work in progress: Spec Miata, MX-5 Cup, Spec E30, Spec E46, Silvia TC Cup, Lamborghini Super Trofeo, 2016 Carrera Cup, 2023 Carrera Cup, Ferrari Challenge, 1988 Corvette Challenge, IROC 1974 (911 RSR), IROC 1975 (Roadster Shop Camaro), Red Bull 2014, Red Bull 2019, Clio Cup, Renault Sport Cup, Radical Cup, BAC Challenge
I do wish that GT allowed for more cars in each grid and for multiple classes of cars. And building whole championships. Would save a lot of time.