I just drove the Patrol up the Sturt Hwy to Callington and back. Its a 40 degree day here in Radelaide. Diving around town the EGT was between 200-300 degrees which is fine. On the flat (freeway) it can get up to around 400 degrees before dropping down to around 350.

Going up the big hill to the tunnel was interesting though. Fourth gear and car felt good but the EGT's got to 600 degrees (alarm sounded from the gauge) and I backed off a little. In no way was I pushing the car but it tended to sit between 550-600 on any of the long hills (5th or 4th gear no difference). On the flat its fine. Also coming off the ramp on to the freeway (flat) I had to give it a bit of stick so I could merge into traffic and again it hit the 600 degree mark.

The Patrol has a Cross Country Intercooler, 3 inch Exhaust and NADS so boost was always around 14.5-15 psi when under load. It has also had the ECU remapped. There was power there but I just felt I could not use it due to the EGT's.

This all happened with the Patrol empty and not towing. If I had the camper I think I would have had to go down to 3rd which defeats the purpose of the ECU remap (more power).

I have a couple of questions:
1. How much difference does the air temp have on EGT's? If it was a cooler day would it have been a lot better or only slightly.
2. What is the max EGT's that a CRD will tolerate. I get the feeling 600 is too low as it gets there very quickly. Or is there something wrong with the tune?