Old 08-24-2020, 08:07 AM
Admirals Club Admiral's Club Member
Join Date: Apr 2009
Posts: 1,302
Received 210 Likes on 130 Posts

My turbos have yellowed, which I think is normal. However if you were running over 80% load you were pushing the engines pretty hard. I typically set in a cruise around the 75% to 77% load range. Your 550's should definitely hit 3300 rpm.