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Old 06-25-2012, 08:52 PM   #1
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Do you mash the pedal climbing mountain roads in the west

or go 3/4 throttle?
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Old 06-25-2012, 09:03 PM   #2
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You should have enough throttle left to be able to gain speed so you're not at WOT but it might not be throttle either.
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Old 06-25-2012, 09:51 PM   #3
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Foot to the floor... let the computers handle the details.
I just drove 700 miles on various 2 lanes in Colorado, 50, 550, 285, several others. 8 to 10% grades and 12,000 foot passes seem to be the norm. There sure ain't no accelerating going on... ISC 360 / 1050, stock, with 08 emissions. Some of these roads pulled me down to 35 mph!
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Old 06-25-2012, 09:55 PM   #4
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try driving an old Foretravel with a 225 horse Cummins
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Old 06-25-2012, 10:05 PM   #5
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I try to select a gear that keeps the engine (Cummins 400ISL) at about 2000 RPM which isn't WOT.

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Old 06-25-2012, 10:12 PM   #6
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Pedal to the metal just wastes fuel and doesn't get it up steep grades any faster. I back out of it and find a speed the engine is comfortable with.
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Old 06-25-2012, 10:12 PM   #7
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I mash the pedal, which just about lets my 370 hp Cummins get my 38,000 lbs up the grade without slowing down too much. No danger of overreving either - the tranny handles that just fine.
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Old 06-25-2012, 10:18 PM   #8
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Quote:
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try driving an old Foretravel with a 225 horse Cummins
Started my RVing in '87 with a 4 cyl Toyato Dolphin. I can remember finally getting to the top of a few grades with speed dropping down as low as 12 to 15 mph. Had a bicyclist do a good job of drafting on me on one climp.
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Old 06-25-2012, 10:59 PM   #9
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If you haven't gained speed prior to starting up you are certainly not going to do it going up an 8% grade. Find the gear and RPM to get to the top. Not WOT
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Old 06-25-2012, 11:45 PM   #10
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I will gear down so I can back off and keep the engine from heating up.
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Old 06-26-2012, 12:25 AM   #11
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Started my RVing in '87 with a 4 cyl Toyato Dolphin. I can remember finally getting to the top of a few grades with speed dropping down as low as 12 to 15 mph. Had a bicyclist do a good job of drafting on me on one climp.
The 22RE does a lot better with a turbo, trust me..
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Old 06-26-2012, 04:54 AM   #12
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So as I understand this correctly, I need to find the peak torque or peak HP RPM's and stay in THAT range, down shifting if necessary?

Regards
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Old 06-26-2012, 08:18 AM   #13
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On my F53, if it hits low gear and high rpm going up hill, I back off until it goes up a gear and I accept whatever speed it gets
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Old 06-26-2012, 08:27 AM   #14
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So as I understand this correctly, I need to find the peak torque or peak HP RPM's and stay in THAT range, down shifting if necessary?

Regards
You can do that if you like, but on a long 8% grade (or even a 6%?) I'm not sure how different your throttle setting and what gear you're in will be much different than if you had simply put your foot on the mat and let the computers do the work for you?

Then again, I have 275 hp. Might be different with 400....
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