Good Sam Club Open Roads Forum: ? Class-A Gas Climbing MPH
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 > ? Class-A Gas Climbing MPH

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tropical36

Southwest Florida_USA

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Posted: 02/16/19 01:52pm Link  |  Quote  |  Print  |  Notify Moderator

dcmac214 wrote:

What's the real gas class-A hill climbing MPH?

Talking to couple old timers while wandering around RV show, one commented and other agreed that a gas Class-A slows down to about 5mph climbing our Western Mountains. I've had occasion to follow some on prior trips and can't recall ever being slowed down anywhere near single digit MPH.

They should probably see about getting the other 4 cylinders to fire.


"We are often so caught up in our destination that we forget to appreciate the journey."

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timmac

Las Vegas

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Posted: 02/16/19 01:54pm Link  |  Quote  |  Print  |  Notify Moderator

I was able to maintain 40-45 mph going thru the Rockies on I-70 towing 6500 lbs on my 08 Bounder V-10 with 5 speed trans..

I do have the full banks power pack system and 5 Star tuning..

5 mph sounds like the old gasser is just wore out...

ScottG

Bothell Wa.

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Posted: 02/16/19 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

5 mph means to me that it may not make it, especially if you had to stop.
My FIL had that happen to him years ago with a marginally weak TV (6.9L FOrd Diesel). Had to get towed up the hill to his house.
(Then he had it turbo'd)

I would not wan't something that weak.


Scott, Grace and Wesly
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Groover

Pulaski, TN

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Posted: 02/16/19 09:43pm Link  |  Quote  |  Print  |  Notify Moderator

I feel pretty sure that if you were only able to run 5mph for very long at full throttle you would quickly let the smoke out of the transmission. Since that apparently didn't happen I am going to say that they were doing at least 20 to avoid having too much transmission slip.

zigzagrv

Nazareth, PA

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Posted: 02/17/19 07:59am Link  |  Quote  |  Print  |  Notify Moderator

Some of the toughest hills are on US65 from Springfield, Mo to Branson. Several looong and steep (over 6% grade)hills. Have to brake going down to stay under 70 mph, then hit the gas near the bottom to get momentum to get to the top. Usually doing 30-35 mph at the top with the rig in my sig with 4-ways on. Good straight road, but difficult to keep up the speed.


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ArchHoagland

Clovis, CA, USA

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Posted: 02/17/19 11:34am Link  |  Quote  |  Print  |  Notify Moderator

zigzagrv wrote:

Some of the toughest hills are on US65 from Springfield, Mo to Branson. Several looong and steep (over 6% grade)hills. Have to brake going down to stay under 70 mph, then hit the gas near the bottom to get momentum to get to the top. Usually doing 30-35 mph at the top with the rig in my sig with 4-ways on. Good straight road, but difficult to keep up the speed.


I remember going over those years ago thinking, wow these are STEEP.


35 to 40 MPH going over Grapevine, Siskiyou's, Tehachapi, Donner.

I've passed diesels on those but it was because the diesel had got stuck behind a slow truck, unable to get around.

Once you lose speed I don't care what you are driving you're gonna be slow the rest of the way to the top.


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GREGORYJ

Lac Du Bonnet, Manitoba

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Posted: 02/18/19 08:57am Link  |  Quote  |  Print  |  Notify Moderator

What often happens going up some mountain grades, I-70 west of Denver being one of most challenging, is needing to gear down to first gear. But keeping the
RPMs at a comfortable 3500 for example, 35mph or more is usually easy to maintain. Often in fact you catch up to slower heavy trucks, and as mentioned above, it becomes difficult to get around, so with the 4 way flashers on, you just follow them to the top. Going up is not the problem, going down is where care in needed. You need to stay in a lower gear, but even then, the RV's speed will tend to keep increasing, so brakes must be applied firmly and briefly, with keeps them from over heating.


Ellen & Greg
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frankdamp

Anacortes

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Posted: 02/18/19 12:10pm Link  |  Quote  |  Print  |  Notify Moderator

Around the Western states, we had some slow going, particularly on SR20 going over Washington Pass (5200' above MSL), but our 32-footer Class A with the Ford V-10 managed relatively easily. I think the slowest climb was out of Winthrop, WA, up the long westbound drag to the top of the pass it got down to 30 mph in a couple of places. That was the only time I was mildly concerned, but more about the coolant temperature than anything else. It's about a 15-minute continuous climb.


Frank Damp, DW - Eileen, pet - female Labrador (10 yrs old), location Anacortes, WA, retired RVers (since Dec 2014)

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