Honda brought the horsepower to the Brickyard this year. The increase in boost pressure for qualifying really suited their engine mapping. Only one Ilmor-Chevrolet engine was in the top 13 spots and Team Penske was shut out of the Fast 9.
https://racer.com/2020/08/15/marco-andretti-honda-dominate-indy-500-qualifying/
https://racer.com/2020/08/15/marco-andretti-honda-dominate-indy-500-qualifying/