Rosenqvist set the quickest four-lap common of 234.081mph across the 2.5-mile oval, boasting a quickest single lap 234.534mph.
With the observe temperature up 20-degrees since closing follow, speeds have been barely slower because the automobiles required extra downforce on the hotter racing floor. However gentle winds helped the drivers to remain flatout on the throttle.
Ferrucci unleashed a stellar four-lap run of 233.911mph that set the tempo for a lot of the session in his Chevrolet-powered Foyt machine.
“That’s about as near the wall as I’ve ever been in qualifying right here,” stated Ferrucci. “Undoubtedly the quickest 4 laps of my life. I wish to make historical past and I need that pole.”
However Rosenqvist nearly matched Ferrucci’s first and second lap speeds and dropped off much less on his third and fourth excursions to go to the highest with 234.081mph, beating Ferrucci by two tenths of a second over the 4 laps.
“It actually helped to see my team-mates run and so they gave me good suggestions,” stated Rosenqvist. “We really bettered our run from yesterday when it was hotter. Let’s go and do it once more.”
Rinus VeeKay (Ed Carpenter Racing), who suffered an exhaust header drawback in closing follow, nearly matched Ferrucci’s tempo lap by lap to supply 233.801mph, which was good for third.
He stated: “Very joyful, it was robust this morning with the problems, however the crew introduced their A-game and the engine felt nice. Fairly proud of that.”
Alex Palou (Chip Ganassi Racing) set an enormous 234.581mph first lap, however his tempo then fell away and he dropped behind each Ferrucci and VeeKay, ending with a mean of 233.779mph in fourth.
“We tried, and we noticed the massive speeds from Santino and VeeKay, however it’s good to get two Ganassi automobiles within the Quick Six,” stated Palou. He was backed up by team-mate Scott Dixon in fifth at 233.430mph.
“That was fairly on the restrict on downforce and stability, the final three laps I used to be hanging on fairly tight as we went fairly aggressive,” stated Dixon. “Some automobiles out right here appear to have a ton of pace.”
Pato O’Ward (McLaren) simply made the Quick Six with 233.229mph for sixth and stated: “I feel we missed it there slightly bit, it began getting actually wiggly.”
Of those that didn’t make it to the Quick Six, Alexander Rossi (McLaren) struggled via Flip 3 on his approach to 233.110mph and can begin the Indy 500 in seventh. “We didn’t fairly get the stability proper, however seventh is an efficient beginning spot,” he stated.
Takuma Sato (CGR) will begin eighth, forward of Tony Kanaan (McLaren), Marcus Ericsson (CGR), prime rookie Benjamin Pedersen (AJ Foyt Racing) and Will Energy (Crew Penske), the latter reporting: “We had a giant push on the second lap and I needed to carry and received near the wall.”
Firestone Quick Six qualifying, that can determine the pole winner of the 107th Indy 500, takes place at 5:15pm native time.