Well I do know of a F7R thats running 612 BHP at the fly.
just some of the specs
Renault F7R 2.0 16v base engine (but only block & head are original!)
DKE EN40B steel custom crank, (shot peaned, & DLC coated)
Custom forged ally pistons
Arrow H beam connecting rods
big valve mods & custom ports to cylinder head
Port throttled with CF plenum & runners
8 injectors
Fly-by-wire throttle actuation
Garret TR30R WRC turbocharger
Custom stainless tubular exh manifold with HKS remote wastegate
ALS bypass system
In-cylinder water injection (ERL)
Front mount custom intercooler with waterspray
custom stainless low inertia flywheel
Custom crank lower girdle plate & dry sump pan
Pace dry sump system
Custom Cams & increased CR
Motec EMS
12bar 2 pump fuel system