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Old 03-29-2012, 07:53 PM   #11
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"If one has to run their gas engine at 5000 rpm to get up a hill,their engine is too small or their camper camper is too big."

Spoken by a true flatlander with a diesel.One who doesn't understand where a gas engine produces it's power(the power band) which is closer to the max horse power then the max torque.With the hills here in BC and a gas engine of the correct size for the camper in tow,if you held your rpm to 3500 you would in no time be in 1st gear for miles on end.My truck engine is a 5.4l Ford and is run at 4000-5500 rpm as nec to keep the engine in the power band it was designed for.I do agree with using the same gear or lower(at a slower speed)when going down the same hill.

Go ahead and flame(fireproof suit on).

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Old 03-29-2012, 08:08 PM   #12
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"don't lug it down"
============
Actually, you will never hurt an engine by "lugging" it, but reving the snot out of it will definitely shorten its life.
We have run everything from massive old Cat Diesels that ran at 1200 rpm, to screaming Detroits, to all sorts of gas engines. We over-reved none of them, ever.
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Old 03-29-2012, 08:11 PM   #13
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My 1/2 ton dodge sounded like I was going to blow it apart I fixed that by trading it in on a 3/4 ton Chevy 6.0 motor 4:10 rear end.. Now I tow with a 1 ton dodge try knocking the smile off my face.
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Old 03-29-2012, 08:13 PM   #14
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09Grizz, we have pulled in the mountains of BC right down to Colorado with a gasser, so I ain't no typical "flatlander". I never found the need to rev the heck out of my engine, seldom pushing it past 3500 rpm. I guess I just wasn't in as much hurry as some?
By the way, I am proud to be a 'flatlander', nothing better than being able to see for 50 miles in all directions, and watching thunderstorms coming over the horizon from the next province! Montana might be Big Sky country, but ours is bigger!
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Old 03-29-2012, 08:56 PM   #15
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I ran my Dodge V10 8.0 liter engine at 4200 RPM's in second gear to get up true mountain grades in the Rockies. It takes high RPM's to achieve maximum horsepower in a gasoline engine.
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Old 03-29-2012, 09:03 PM   #16
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Crocus.

We have had some manual trans diesels (at the repair shop I work at)(Ford,GM, and Dodges) that have worn out the crank bearings from being lugged at a too low of rpm(old highway rig drivers)accelerating in 4th gear with a load at 1000 rpm(they should have been in 2nd gear)But typically lugging doesn't hurt an engine.Yes,you have every right to be proud of being a flatlander(have a few friends and family that live on the prairies)as I am of being a mountainer and a Canadian.Maybe our paths will cross and we can have a Beer or other together,Cheers.

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Old 03-29-2012, 09:15 PM   #17
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We live in STL and we're wondering what hill to which you're referring?
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Old 03-29-2012, 09:18 PM   #18
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I also go through the mountains of BC and I try to keep the RPM's below 3500. Most time I pull in behind a 18 wheeler and follow him up. By the time we reach the top we might only be doing 35mph but what is the rush?
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Old 03-29-2012, 09:29 PM   #19
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mtnguy doesn't say if his is a diesel or not, 3-3500 for a diesel pull up hill is good but for a gasser 4-5000 is more appropriate because that's where a gassers power band is at.
Crocus is correct, I have a gasser.....the 5.4L. Yes, I would get more power in the 4000 rpm range, but 3000 to 3500 is plenty power for me....without working the engine hard.
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Old 03-29-2012, 10:55 PM   #20
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One thing you get taught when getting your Commercial Drivers license is "never go down a hill faster than you would go up it". Has worked for me, and I rarely go uphill at more than 3200rpm, so I come down them pretty slowwww.
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