You know I have hauled heavy equipment, dirt and rock up and down all over the mountains on 21,16,421,321,221,181, 40 across black mountain and up to the top of beach and bald Mtn. and up the Mtn on 19E coming back from Johnson city TN. The only time I have ever had a problem was with a truck that the owner was to sorry to service the cooling system in and the water in the radiator look like mud. I say most of those trucks you see over heated on the side of the road are because the driver pushed the truck to hard by pouring the fuel to it hoping to go faster or had cooling system that need to be service.
As a DOT approved CMV driver with a CDL I agree. When you increase your ALT you must increase RPMs to or decrease MPH keep the BTUs from increasing. However when you reduce ALT the increase in RPMs to maintain your MPH can automatically increase your BTUs in you POV or CMV. JMO
Joe T. I have to say being a CMV driver myself with my CDL for over 20 years now. You need more RPMs to go more MPHs, sort of takes one to do the other UNLESS you're going down hill thanks to gravity. But now go up Black Mtn toward Asheville on I-40 and you'll see loads of trucks over heating and hitting the shoulder because they are going too slow to cool the engine. Also you'll notice the states that do NOT require state inspections i.e. Tennessee, their roads are terrible, filled with potholes and falling apart, very rough roads. That is why. My uncle has A LOT of years employed by the D.O.T. and he knows all about how this works and explains it all to me. I agree with Osmosis it's unfair that a d.w.i. recipient can then ride the roads on a moped for free while I go by the law and I have to pay.
I don't need you to explain engines to me since you don't understand what you are talking about. I guess it is a good thing that you aren't going to post any more since you can't understand the difference in engine speed (RPM) and a cars speed (MPH). Semi's operate at 1800-2200 rpm and are water cooled and they seem to pull 421 mountain with out any problems. do some research and you will find that regardless of the type of engine the slower the RPM on the engine the longer it will last.
By the way cars are designed with a cooling fan to force air thought the radiator if you have a problem with overheating at slow speeds you should have your cooling system check.
J T- Lawnmower engines are most often air cooled. The usually have 2 cylinders or less. They don't put out as much heat. Air is forced through fins cut in the ehgine block and cylinder head. The heat in most automotive engines is removed from the water that circulates through the block and heads by air passing through the radiator. If you slow an engine that is working down and the flow of air through the radiiator is restricted the engine temperature will rise. Take your car up 421 toward boone and drive up the mountain real slow. See what happens. Im not going to post anymore about this topic. Maybe you'll meet some of those freeloading moped drunks from Watauga and Wilkes coming down the mountain.
None of what you posted changes the fact that the slower a engine turns the longer it will last. The fact that your friend had a car with a poorly design cooling system doesn't change this. There are several ways to over come heating issues on a car that requires airflow for cooling. High revving high Hp engines don't last very long compared to their slowing turning brethren. Take lawn mower engine for an example engines that turn 3600 rpm don't last as long as one that turns 1800 it is the same for any engine. This is why most commercial and industrial engines turn at 1800 rpm or slower some as slow as 900 rpm. I just read about a Natural gas pumping station off of I-77 in Virginia that has use the same low speed pumping engines for over a hundred years only being shut down for routine maintenance. I doubt any that the high revving engines that they are being replace with will last that long.
As far as inspections goes the emission test is not require in every county and not all cars are require to have the test. As far as that goes there are states that don't require any inspection period there for it can't be considered federal mandated unlike the inspection for a commercial motor vehicle which has to be done on all CMV in all states.
Joseph T If you try to run a high output engine real slow you can' t run enough air through the radiator to keep it cool. A friend of mine use to have a Plymouth Roadrunner that you couldn't drag main in Elkin with because it would overheat. The fan wouldn't pull enough air through it to keep it cool. If we sped up to 40-45 you could watch the temp guage go down. I was sort of referring to the old James Taylor song Traffic jam. Also I think the EPA requires the state to test vehicle emissions in a lot of NC countys. The state requires the emissions test because the EPA ( part of the federal government) forces them to. If the state didn't test them the feds wouldn't give us highway money. I had to get my old Camry worked on this time because it wouldn't pass inspection. Coat me over 200 dollars. Its not a commercial vehicle. I get tired of spending my money to use the road and some guy gets a free ride. I think if you use the road you should have to pay your part. Why should I have pay to drive along when some people don't.
Go to any drug rehab center and you might see one moped for every thousand cars. I almost got ran over this morning by one of these fine, outstanding tax paying citizens a few minutes ago. They came out of a sharp curve in my lane and I had to hit the shoulder to avoid a head on collision. My maddog got shook up but is ok now and I have it sitting in the river getting cool. If you can't keep that car or pickup on your side of my highway stay off the **** roads. �
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What a dumb ***.
