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So if I am understanding you right for steep mountain grades at high altitude keep your pedal above 90% for PE and a gear which doesn’t take you much above 3,000 RPM unless you can pull the grade in a higher gear and keep it around 3,000 RPM. I’m thinking about the long steep grade on 395 from Bishop to Mammoth and the the even higher grade from Mammoth to June Lake. Summits are at 8’000’ and above and outside temperatures as high as 100. I’m not worried about PE as much as I am about engine temperature. I’m pretty sure we will detach the toad in Bishop and keep the chassis AC off and maybe start the generator and run the coach AC.
I have a 16% downgrade from Big Bear to Lucerne and I will use tow haul and have the toad in tow. Coming up we usually detach the toad and turn the AC off. I usually pick my gear and just try to go up in second at around 3400 RPM’s and 20 to 35 mph depending on the slope. I did this a week ago at 98 with no problems, summit is around 7,000’. I try to keep the pedal constant except for the really steep hairpins.
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