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  #1  
Old 01-12-2010, 07:46 PM
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High Altitude & Naturally Aspirated

I'm planning a road trip for this summer. I'd like to go to Colorado. Has anyone taken a 1995 E300D over 8,000 feet? Anything in particular I'll need to adjust?

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Old 01-12-2010, 07:59 PM
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Originally Posted by JayK View Post
I'm planning a road trip for this summer. I'd like to go to Colorado. Has anyone taken a 1995 E300D over 8,000 feet? Anything in particular I'll need to adjust?
Your attitude towards top speed going over the passes?
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Old 01-12-2010, 08:15 PM
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I took my 67hp 240D over those passes.

Scott
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Old 01-12-2010, 08:19 PM
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I took my 67hp 240D over those passes.

Scott
At about 45mph I'm guessing.

Turbocharged Diesels love high altitudes, NA versions.... not so much.
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Old 01-12-2010, 08:30 PM
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At about 45mph I'm guessing.

Turbocharged Diesels love high altitudes, NA versions.... not so much.
Very good guess. 40-45 mph up the highest roads at around 10,000+ feet above sea level. Not bad for 67hp.

Scott
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Old 01-12-2010, 08:36 PM
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If you look at other parts of the world, there are plenty of locations where Mercede3s diesels are used at high altitudes. Many snow plow tractors in Europe are MB.
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Old 01-12-2010, 08:39 PM
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Basically there's nothing you can do about the power loss. Running out of air is simply running out of power, without a turbo you're out of luck. The 240d example is to show how it's not that big of a deal. Although the 45mph deal isn't reassuring, I'm sure it's not going to be that bad since you're starting with around 140hp instead of 67.
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Old 01-12-2010, 08:51 PM
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The 240d example is to show how it's not that big of a deal.....
You might feel a bit differently about that issue when you gaze into your rear view mirror and see a Ford F-350 dually (that has a very effective turbocharger) doing 85+ MPH closing on your 240D that is lumbering along at 40 MPH.

I haven't used a 240D or (even worse) a 220D as a daily driver in many years but I've logged more than a few miles on upgrades on the shoulders with my flashers on doing 40 MPH.

I don't miss those times.....
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Old 01-12-2010, 08:59 PM
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I'm not concerned about speed, since I'm a slow driver anyway. I'm more worried about smoking. Is that to be expected at high altitude?
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Old 01-12-2010, 09:06 PM
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If it's working properly it'll detect the pressure change and reduce the fuel.
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Old 01-12-2010, 09:14 PM
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I'm not concerned about speed, since I'm a slow driver anyway. I'm more worried about smoking. Is that to be expected at high altitude?
Smoking? No. Unless you mean smoking cigs because you are nervous about 18 wheelers running over you.

Just kidding. I drove my '95 E300 over the Rockies last year. And to boot (although I didn't realize it at the time) my linkage was all jacked up so it wasn't downshifting properly. I had to do my own downshifting - the way it shifts now I don't think I would have any trouble climbing those hills. You be fine if everything is in order.
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  #12  
Old 01-12-2010, 09:27 PM
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I've driven my 240D over the Sierra Nevadas many times. There are two passes over 8,000 ft between Carson and San Diego, and it makes it just fine, as long as 40 mph classifies as fine.
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  #13  
Old 01-12-2010, 09:30 PM
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Originally Posted by Scott98 View Post
Very good guess. 40-45 mph up the highest roads at around 10,000+ feet above sea level. Not bad for 67hp.

Scott
That's about what my 240D will do at 10K feet, limited by the rpm in 3ed gear. It goes downhill very nicely.
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Old 01-13-2010, 11:13 AM
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Originally Posted by TimFreeh View Post
You might feel a bit differently about that issue when you gaze into your rear view mirror and see a Ford F-350 dually (that has a very effective turbocharger) doing 85+ MPH closing on your 240D that is lumbering along at 40 MPH.

I haven't used a 240D or (even worse) a 220D as a daily driver in many years but I've logged more than a few miles on upgrades on the shoulders with my flashers on doing 40 MPH.

I don't miss those times.....
85+ mph is illegal . . .

I also drive a 240D, been over 10,000' with it too. I'd not worry about a car with more power being safe, besides most interstates have a min speed of 40-45mph anyways, which most of them have a LAW that if your driving over the min, that you can not use your flashers.
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  #15  
Old 01-13-2010, 11:48 AM
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In practice, there is always a line of trucks in the right lane of those mountain highways. With a 240D, you will end up in the right lane with the trucks on the steep grades. In many places there is and extra right lane for slow traffic, it's not a problem unless you're in a hurry.

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