Sebastien Bourdais has set the benchmark on ‘Fast Friday’ at Indianapolis, while Fernando Alonso was fourth fastest for the third day in a row.
With cars in qualifying trim ahead of Saturday’s first day of qualifications, including an extra 10kPa of turbo boost, Bourdais lapped the 2.5mi superspeedway in 38.6074s (233.116mph, 375.164km/h) during the first half-hour of the day.
The Dayle Coyne Honda driver’s effort bested that of Ryan Hunter-Reay, who had set a 38.7711s within the first 10 minutes of the session in his Andretti Autosport Honda.
Hunter-Reay remained second for the duration, while the top two were reversed on the non-tow rankings.
Another two Andretti entries followed, with Takuma Sato third-fastest.
Unlike most of the front-runners, Alonso’s fastest lap in the McLaren-backed Honda came in the final hour of the day, and in a good sign for qualifying was the first of four consecutive laps above 231mph.
Rain had threatened and ultimately cost drivers more than two-and-a-half of the six hours of scheduled running, hence the early rush to set lap times.
Juan Pablo Montoya led the Chevrolets for Team Penske in fifth, while team-mate Will Power was 16th.
Spencer Pigot (Juncos Racing Chevrolet) and Zach Veach (AJ Foyt Racing Chevrolet) came to grief at Turns 1 and 2, respectively, but neither was injured.
Saturday sees a further 90 minutes of practice from 2200 AEST before Day 1 of qualifications starts at 0100 (Sunday morning) AEST.
VIDEO: Pigot hits the wall
VIDEO: Veach hits the wall
Practice 5: Indianapolis 500
|Pos||Driver||C/A/E/T||Time||Diff||Gap||Best lap||Total laps|
|4||Alonso, Fernando (R)||D/H/H/F||00:38.8220||0.2146||0.0237||36||46|
|5||Montoya, Juan Pablo||D/C/C/F||00:38.8463||0.2389||0.0243||5||17|
|9||Jones, Ed (R)||D/H/H/F||00:38.9185||0.3111||0.0004||8||23|
|25||Harvey, Jack (R)||D/H/H/F||00:39.4001||0.7927||0.0341||22||23|
|30||Veach, Zach (R)||D/C/C/F||00:39.6333||1.0259||0.0151||41||52|
(C)hassis: D=Dallara | (A)erokit: C=Chevy, H=Honda | (E)ngine: C=Chevy, H=Honda | (T)yre: F=Firestone