The 2021 NASCAR Cup champion will make his IndyCar debut in May's blue ribband with Arrow McLaren, in partnership with Hendrick Motorsports, and completed 172 laps of Phoenix Raceway on Monday.
The test was moved up by a day due to the impending threat of rain, which forced Larson to “get my mind right to prepare myself for that”.
“I thought it went smooth,” Larson said after completing “three or four hours” of running.
“It was good to run through some things, get comfortable out there making laps, but get to do some pitstop stuff.”
Larson revealed that on his final run of the day, “I almost spun out“ when he began searching for the limit but fortunately “was able to catch it”.
“Just got caught off guard a little bit,” Larson said. “I had some warnings a few laps before.
“Honestly, though, nothing about yesterday felt way different than what a Cup car, Next Gen car, feels like. That was good for me.
”I think the characteristics of the Indycar versus the Cup car, at least at Phoenix, felt very similar. You're just going a lot faster in an Indycar.
“The moments happen a lot quicker. The edge of good versus not good feels a lot sharper.”
Source: Autosport