For the MLK weekend, we decided to rip it up at the Imperial Sand Dunes (ISDRA), so I got a wild hair and wanted to see how my truck would do with the new goodies on my Aggressive Tow tune pulling my 12k lb trailer. Long story short-I was VERY pleased. For this trip, the gross of my truck and trailer was roughly 18k lbs, it was about 75* ambient temperature and while there are only 2 "real" hills (Mohawk mountain and Gila mountains) between Phoenix and ISDRA, it handled them both quite well.
I won't post the whole datalog, but below are my average and peak readings.
Vehicle speed was 75mph
Tranny temp was 175*; 185* peak
EGT's were 1200*; 1350* peak
EOT's were 216*; 239* peak
ECT's were 209*; 225* peak
ICP was 2141psi; 4061psi peak
Peak temps were recorded pulling the 2 mile 6% grade through the Gila mountains with the pedal to the floor. It didn't help that I was passing a similarly equipped 03 F-250 with about the same size trailer with Banks stickers plastered all over it. It was priceless to see his face as I cruised passed him... I can only imagine his complaint to his Bank's dealer when he got back home!!!
When I crested the hill, I was down to 62mph, which is about a 10mph increase over my stock turbo setup!
I believe that despite running a hotter tune (which hasn't been tweaked for my new turbo), my BPD oil cooler worked EXTREMELY well at keeping the temps in check as did my new turbo. I would imagine that if I got my aggressive tow tune tweaked to match the new airflow, I could improve the EGT's while cruising and perhaps keep the oil a touch cooler.
I guess I could always run my "standard" tow tune which runs cooler temps yet, but what fun is that?