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Old 06-11-2013, 05:55 PM   #1
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I70 in Colorado. 11+k feet high. Anyone have a problem

We are thinking of taking I70 in our Damon Astoria 340HP over Colorado's I-70. Has anyone completed that trip, 11K feet and a long tunnel. Any problems? Advice?
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Old 06-11-2013, 07:06 PM   #2
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You will be fine. Trucks do it both ways every day. Steep but doable and it is a long pull but just keep your foot out of it and let the engine take care of it's self. Pay attention when in the tunnel and you will see there is plenty of room.
Thing that bothers me more than anything else heading west is the traffic in and around Denver. Good traveling to you
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Old 06-14-2013, 12:22 PM   #3
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The Eisenhower tunnel itself is not a problem. Getting up to it is not a problem. Getting down from it requires caution and diligence ... it is a very long downgrade so you need to keep your speed under control for 4 or 5 miles.

I have been through there several times in my motorhome ... I think you should plan about an hour to travel between Georgetown and Silverthorne (in either direction)
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Old 06-14-2013, 04:35 PM   #4
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Did that trip going west a couple of years ago and it took me three days. First day was from Royal Gorge to train up Pikes Peak, then west side of Denver and starting the long grade. Engine started getting too hot for first time. Since then learned about slobber tubes (fixed), gunked up radiators (fixed), and keeping engine rpm's at or near peak hp and torque (driver education fixed). Stopped first day at Idaho Springs, because it was that time of day, not because engine was too hot. Next morning, three inches of snow!. Eisenhower Pass required chains and being from Texas, that was not going to happen. Pleasant day of walking in the snow and reading. Then third day, pulled rest of grade without a problem, and eased down the other side. Keeping geared down and occasionally braking enough to slow and then letting brakes cool. Do not have engine brake. So to answer your question, I do not think you will have any problem with the grade. Just slow and steady and keep an eye on temps. And enjoy the great views. Happy trails.

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Old 06-14-2013, 05:13 PM   #5
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Quote:
Originally Posted by skigramp View Post
The Eisenhower tunnel itself is not a problem. Getting up to it is not a problem. Getting down from it requires caution and diligence ... it is a very long downgrade so you need to keep your speed under control for 4 or 5 miles.

I have been through there several times in my motorhome ... I think you should plan about an hour to travel between Georgetown and Silverthorne (in either direction)
Not to hijack this thread but can you go thru the tunnel with the propane tank. Do you have to shut it off. Just wondering?
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Old 06-14-2013, 06:21 PM   #6
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No signs or restrictions posted about LP gas in the tunnel. Not only is the grade steep from the tunnel west, but you also have Vail Pass to go up and down. Pay attention to temperature and RPMs. Downshift when hot and let engine revs go up to aid in cooling. Use engine brake and don't go down faster than you went up. If you apply brakes, do it firmly to reduce speed by at least 10 mph, then let foot off and wait until speed builds again, then firm braking. A long braking to slow will overheat brakes and cause failure.
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Old 06-15-2013, 11:27 AM   #7
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This is very good advice. Also, if you plan on mountain driving, consider flushing / changing brake fluid. Brake fluid absorbs water; which lowers the boiling point, and steam is a very poor hydraulic fluid.

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No signs or restrictions posted about LP gas in the tunnel. Not only is the grade steep from the tunnel west, but you also have Vail Pass to go up and down. Pay attention to temperature and RPMs. Downshift when hot and let engine revs go up to aid in cooling. Use engine brake and don't go down faster than you went up. If you apply brakes, do it firmly to reduce speed by at least 10 mph, then let foot off and wait until speed builds again, then firm braking. A long braking to slow will overheat brakes and cause failure.
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