Chowrasia shot 72 and was still at three-under for 36 holes in tied 44th place, while Shiv Kapur (69) was at two-under 142 and in tied 57th place.
Missing the cut were Gaganjeet Bhullar (70-73) and Jeev Milkha Singh (76-71).
Chowrasia, making an attempt to win back his card and full playing privileges on European Tour, where he twice won co-sanctioned events with Asian Tour, shot an even par 72, which included three birdies on front nine.
Kapur, starting on the back nine, had four birdies against one bogey.
More From This Section
Meanwhile, a superb back nine of six-under 30 helped Stephen Gallacher revive his Ryder Cup dream.
The Scotsman, who needs to win or finish second (alongside no more than one other player) in Italy to take the last of nine available spots on the European Team to face the USA at Gleneagles next month, was informed that South African Hennie Otto and Austrian Bernd Wiesberger had carded respective rounds of 62 and 66 to move 15 and 12 shots clear of him as he prepared to begin his second round at Circolo Golf Torino - La Mandria.
But Gallacher roared back into contention with a sensational back nine that saw him make six birdies to take a huge chunk out of Otto's lead and give himself a chance to achieve his goal of a top two finish with 36 holes to go.