There was a thread posted several years ago on this forum, but unfortunately, the OP didn't respond with the fix.
http://www.svtperformance.com/forums/showthread.php?784416-2011-GT500-boost-dropping-off
I just picked up a 2012 GT500 with 14k miles on it and have the exact same issue as the video below. Yes, my foot was mashed to the floor as well.
[video=youtube;bHe808NqIPg]http://www.youtube.com/watch?v=bHe808NqIPg[/video]
Only mods:
2.5 pulley
90mm idler
Borla Touring Axleback
http://www.svtperformance.com/forums/showthread.php?784416-2011-GT500-boost-dropping-off
I just picked up a 2012 GT500 with 14k miles on it and have the exact same issue as the video below. Yes, my foot was mashed to the floor as well.
[video=youtube;bHe808NqIPg]http://www.youtube.com/watch?v=bHe808NqIPg[/video]
Only mods:
2.5 pulley
90mm idler
Borla Touring Axleback