Cosworth's new 750bhp ChampCar V8

The new Cosworth XF-E engine for America's 2003 CART FedEx Championship series [June 21], although closely based on the UK company's existing 2.65-litre ChampCar V8, will be restricted to 12,000rpm (from 16,000rpm) and 'lifed' at 1200 miles (from 600). Increased turbocharger boost pressure will deliver up to 750bhp for road and street circuits, and 700bhp for ovals

Cosworth's new 750bhp ChampCar V8

Over 2003-04, Cosworth will sell 100 of these 'spec' engines to CART, which will lease them to the teams at the rate next season of US$1,125,000, including rebuilds. The XF-E has a range of internal revisions aimed at providing consistent power over the projected 1200-mile maximum service life (2002 engines are lifed at 400-600 miles). All rebuilds will be carried out by in Torrance, CA. The teams will be able to return an engine any time after it has completed 800 miles. No team will get to retain the same engines throughout the season: after rebuilding, each unit will go into a 'pool' to be randomly distributed to its next user.

The maximum crankshaft speed will be cut to 12,000rpm for all 2003 applications, be they testing, qualifying or racing. However, CART's request for an engine that will generate 750bhp for road and street courses has been met by a turbocharger boost pressure increase to 41.5in Hg (1.40-bar) for 2003, from 34in Hg (1.15-bar) used in 2002. Boost will be reduced for oval track events, so as to peg power outputs at 700bhp.

Features that make the engine more complex to operate, such as traction control and fuel mixture control, have been eliminated. A selection of torque maps will be available to cater for tighter tracks such as the street courses at Denver and Long Beach.

Cosworth's project director is Bruce Wood.

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