No problems
We chipped our JD 6850 spfh from 450 hp with a 30% program to 585 hp and have had no problems with the 12.5 L. We even put on a pyrometer on and have had no issues with more heat. At night when the cool air comes on we would be running 1200 to 1250 degrees before the turbo. My opinion is that in a combine you will have no issues. A chopper has a lot tougher life than a combine if you've ever ridden in one. We pushed it all the time. I wouldn't go back to stock and fuel efficiency went up!
We chipped our JD 6850 spfh from 450 hp with a 30% program to 585 hp and have had no problems with the 12.5 L. We even put on a pyrometer on and have had no issues with more heat. At night when the cool air comes on we would be running 1200 to 1250 degrees before the turbo. My opinion is that in a combine you will have no issues. A chopper has a lot tougher life than a combine if you've ever ridden in one. We pushed it all the time. I wouldn't go back to stock and fuel efficiency went up!