Should plans continue unchanged, this would be the first use of turbocharged engines since the infamous IRL/CART split of 1994. Although CART (and its successor, Champ Car) continued to use turbos through its demise in 2007, the IRL switched in 1997 to normally aspirated V-8s.
Although the exact specifications are yet to be drawn, the new engines could be either four- or six-cylinder blocks with a single- or twin-turbocharger setup. Either way, the IRL is hoping to see power increase to approximately 750 hp.
Officials also hope the new engine specs will attract more manufacturers, moving the IRL away from an all-Honda series. Although Honda has expressed interest in the new regulations, Brian Barnhart, president of the IRL, claims another two or three companies are considering joining the field.
Source: Indianapolis Star