By alley - Jul 24, 2015, 4:10 PM ET

IMSA: RSR, Magnus top Lime Rock FP2

The Rocket Sports Racing duo of Bruno Junqueira and Chris Cumming were fastest during Friday's second practice session at Lime Rock Park.

Junqueira, the 2002 Indy 500 polesitter, posted a lap of 0:48.919 to lead Starworks Motorsport's Renger van der Zande whose 0:48.953 was marginally faster than the 0:49.055 managed by Tom Kimber-Smith in the PR1/Mathiasen entry. Colin Braun, who

led FP1 in his CORE autosport PC

, was fourth with a 0:49.076.

Magnus Racing's Andy Lally improved from third in FP1 to first in FP2 with Porsche 911 GT America GTD entry. His 0:53.536 was a full 0.560 seconds clear of Christopher Haase's Paul Miller Racing Audi R8 LMS (0:54.096), 0.656 ahead of Kuno Wittmer's TRG-AMR Aston Martin V12 Vantage (0:54.192).

16 cars partook in FP2; the 17th entry for the No. 97 Turner Motorsport BMW Z4 is currently being repaired after a crash in FP1.

Qualifying for IMSA's Northeast Grand Prix is up next at 5:15 p.m. ET