A pretty crappy day overall. The gear whine is gone from the differential but I still have a bearing somewhere that's bad. I'm really hoping it's not the pinion bearing. I'll replace the rear wheel bearings first if I can't track down exactly where it's coming from. The water/meth is cooling when it's on. The real test will be when I'm at high boost for 10 or 20 minutes. With less power the results will be difficult to quantify. At the 300 HP level I wasn't having a problem with the ECT's. The IAT's max out at 180º no matter my power level or heat exchanger setup so those will be what I give the most creedence. I'm real depressed over the tuning situation. I'm calming down now so I'll dash off an email to my tuner.

Les