11. The first post-war rules for the top level of motor racing allowed 1.5-litre supercharged or 4.5-litre normally aspirated engines . 12. Since atmospheric pressure reduces as the aircraft climbs, power drops as a function of altitude in normally aspirated engines . 13. It marked the introduction of a new production-based, normally aspirated engine formula as well as a new chassis design. 14. As early as 1989, the 9000 was equipped with the larger B234 2.3-litre engine, providing in the normally aspirated engine . 15. Combined with their normally aspirated engines and a higher downforce chassis, the IRL cars were able to handle the steep banking. 16. On a normally aspirated engine ( no turbo ) you might not improve things at all-and you could make matters worse. 17. Single-seat chassis built by G Force and Dallara will be matched with Oldsmobile Aurora and Nissan Infiniti Indy 4.0-liter normally aspirated engines . 18. However, in race trim they were delivered putting out, which could be improved further to, while still using normally aspirated engine components. 19. It also swallowed a huge pill of pride when it decided to abandon the turbocharged engine in favor of a normally aspirated engine . 20. The chosen engine is the Lycoming TIO 540 AH1A engine, which is a turbocharged version of the currently installed normally aspirated engine ."
