[assasinator]

what about the 3.5 liter naturally aspirated rule?


Type: 3.5-liter (213.6 cubic inches) V-8, 32-valve dual-overhead cam (DOHC), Normally aspirated (no turbocharger) Max. bore diameter 93 millimeters Four camshafts, four valves per cylinder.
Weight: Minimum dry weight is 280 pounds - no headers, clutch, ECU, spark box or filters.
RPM: 10,300 rpm maximum (league-supplied rev limiter).
Power output: 650 hp (485 kW).
Fuel: 100% fuel grade Ethanol


i see it now.....
The new rules for 2012 specify turbocharged engines up to six cylinders with a maximum displacement of 2.4 liters.



Following last weekend's running of the Indianapolis 500, the Indy Racing League announced that when its next-generation engine rules go into effect, smaller displacement, boosted engines would replace the current, normally aspirated 3.5-liter V8 engines. The specifics of the new powertrain package still need to be ironed out, but displacements will be limited to 2.4-liters with no more than six cylinders.

By allowing more architecture flexibility, the series hopes to attract more manufacturers to build powerplants. For the last several years, all of the IndyCar engines have been supplied by Honda. IndyCar will also be taking a page from the American Le Mans Series with some green initiatives like adding kinetic energy recovery hybrid systems (KERS) and other fuel efficiency technologies.