ex JGTC (now Super GT) have some crazy cars... all the GT500 class cars can basically destroy GT1, GT2, GT3 cars easily. They are almost on par with P1 machines.
Engines:
NSX-GT: C35B 3.5L V6
GT-R: RB30DETT/VQ45DE 3.0 I6 TT/ 4.5L V8
Supra: 3S-GTE/4T-GTE 3.0L I4 TT / 3.0L I6 TT
SC430: 3UZ-FE V8 4.3L V8
HSV-010GT: HR10EG 3.4L V8
R35: VRH34A 3.4L V8
GT500 GT-R Video - Hits 700-800hp when delimited, ballasted to weight at lease 1100kg, generates twice its own weight at around 200km...
http://speedhunters.com/archive/2008...ssan-gtr.aspx#
Just a glimpse of what they do to their cars in GT500 class.
2009 Honda NSX-GT Final Specification
* Chassis: NA2, Carbon fiber reinforced aluminum frame, steel Roll cage, JAF approval.
* Engine: C32B based, water-cooled V6 Normally aspirated (Longitudial-mounted), 3.494 liters, DOHC, 4-valves per cylinder, dry-sump.
* Power: 500PS (Limited)/ Over 400NM
* Fuel: On the market unleaded 100 RON gasoline
* Lubrication: Mobil 1, BP, MOTUL, Elf
* Fuel delivery: Fuel injection
* Wheelbase: 2530 mm
* Length: 4610 mm
* Width: 2000 mm
* Weight: Over 1120 kg
* Fuel capacity: 100 Litres
* Clutch: AP C/C 5.5" 4 plates pull
* Brakes: Alcon, Performance Friction
* Springs and dampers: Showa Double wishbone inboard type
* Gearbox: Hewland 6-speed sequential.
* Spark plugs: NGK
* Wheel rims: RAYS Engineering, BBS F: 13J-18, R: 13J-17.
* Tires: Bridgestone, Dunlop F: 330/40 R18 , R: 330/45 R17 radial slick/treaded rain tires.
* Intake air restrictor: 29.1 mm 2mm
* Safety equipment: TAKATA 5-point seatbelt, HANS Device
* Team: Autobacs Racing Team Aguri, Dome Racing, Nakajima Racing, Real Racing, Team Kunimitsu.