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shoestring

Tennessee

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Posted: 09/29/09 07:24pm Link  |  Print  |  Notify Moderator

I have a 2008 Fleetwood Terra LX with the Ford Chassis. The RPM gauge does not have a red line on it. I am trying to figure out what the red line is, and what is normal for the V10 as far as RPM's. When climbing steep grades the rpm's will rev pretty high (3500 to 3700 is about as far as I let it rev). I will back off the gas as much as possible, but I usually end up going pretty slow. I think I am just not use to hearing the high rev of the gas engine. Does anyone know what would be an ok RPM range for climbing hills and steep grades, and what the red line is? Any advice is appreciated. Thanks for the help.

2oldman

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Posted: 09/29/09 07:31pm Link  |  Print  |  Notify Moderator

v10 redline - google search

TN Tarheel

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Posted: 09/29/09 07:32pm Link  |  Print  |  Notify Moderator

There was a thread on this subject so you might search for it. As I remember, there is no "red line" as computer will not let you over rev it.

skipnchar

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Posted: 09/29/09 07:32pm Link  |  Print  |  Notify Moderator

The V-10 Triton engine or it's companion 5.4 engine has no red line. It is computer controlled and the computer will not allow it to over rev. The only thing that the owners manual says is to not run the engine at maximum RPM for long periods of time.
Good luck / skip


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smkettner

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Posted: 09/29/09 07:41pm Link  |  Print  |  Notify Moderator

Find the peak horsepower RPM and add 500 to 1000 as a practical max.
The peak torque rpm +500 is good for running all day.


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JimM68

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Posted: 09/29/09 07:51pm Link  |  Print  |  Notify Moderator

smkettner wrote:

Find the peak horsepower RPM and add 500 to 1000 as a practical max.
The peak torque rpm +500 is good for running all day.

accurate, but not really practical.

Mine upshifts at 5200.

On a tough climb, it will downshift to second and put the rpm's at 4500. If the climb is really tough and it won't pull second it may downshift to first and the rpms then pop back to 4500.

I "really" don't like listening to her scream at 4500 rpm with my foot on the floor, but I've done it, for as long as 10 minutes a time or two.

Generally tho, I'll back off the gas and let her slow until the rpm's are below 4000.
Mostly for my own peice of mind, that ole v10 don't care.


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mountainviewer

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Posted: 09/29/09 08:25pm Link  |  Print  |  Notify Moderator

In 1999, when our V-10 powered unit was new, I was concerned about no red line on tach, and high reving of the V-10.

I called Ford Motorhome customer sevice in Lake Havasu, and they told me there is no red line on the tach, because computer will limit revs to a max of approx 5200, so no way to overrev the engine in normal driving. They said the V-10 is designed to be hi revving,

They said the only way to overrev the V-10 is when decending a long grade using engine braking, and that could push the rpms past the recommended limit, and to be VERY careful and not let that happen.

garym114

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Posted: 09/29/09 08:48pm Link  |  Print  |  Notify Moderator

Stock 2003 Ford V10 6.8L HP RPM Graph


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XBoater

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Posted: 09/29/09 09:48pm Link  |  Print  |  Notify Moderator

Gee, looking at that chart when the engine reaches 5000 rpm the HP and torque will be at zero.

I have been at that stratospheric level once or twice and the motor is sure making a lot of noise for not producing any power...


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smkettner

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Posted: 09/29/09 10:10pm Link  |  Print  |  Notify Moderator

JimM68 wrote:

smkettner wrote:

Find the peak horsepower RPM and add 500 to 1000 as a practical max.
The peak torque rpm +500 is good for running all day.

accurate, but not really practical.

Mine upshifts at 5200.

On a tough climb, it will downshift to second and put the rpm's at 4500. If the climb is really tough and it won't pull second it may downshift to first and the rpms then pop back to 4500.

I "really" don't like listening to her scream at 4500 rpm with my foot on the floor, but I've done it, for as long as 10 minutes a time or two.

Generally tho, I'll back off the gas and let her slow until the rpm's are below 4000.
Mostly for my own peice of mind, that ole v10 don't care.


Peak HP is at 4750 so shifting at 5200 sounds perfect. Yes I think that is a practical max to run it up to catch the next gear. No I would not run it at 5200 for 20 minutes.

Peak Tq is at 3250 so add 500 gives 3750 and that seems to be where you run it when you have a longer incline to pull. The v10 will run at 3750 all day long. Although I would not run that rpm unless you require full power all day long and you never will.

The OP was concerned about running at 3500/3700 when needed and this rpm is just fine for as long as the mountain road is going up or aiding the braking during decent.

RPM #s from F350 v10 specs on www.msn.com

JMHO, YMMV.

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