Gas vs PSD
Senior User
Joined: May 2004
Posts: 407
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From: Humble, Texas
That is all interesting information, and an interesting question at the end. I would have to think that while a turbo helps at altitude, there still must be some detrimental effect. I doubt that you get sea-level performance at any altitude just because you have a turbo. But I don't know for sure...
The 6.0 is more complicated because it doesn't have a wastegate. I assume the 6.4 is in the same boat but I don't know. I'd assume that it doesn't have excess capacity so, therefore, no need for a wastegate. However, it's possible that the variable vanes take care of the excess capacity rather than a wastegate. This is a long complicated way to underscore my ignorance on the subject. Although my 6.0 doesn't seem to lose any power at elevation but that is hardly an objective or scientific observation.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,852
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On a wastegated turbo, there will be a "critical elevation" that the turbo can provide the same induction pressure to the engine that it did at sea level. The 7.3 would fall into this category. So it can maintain sea level performance up to its critical elevation. I have no idea what that elevation is but I believe it is above 8,000.
...and the light bulb went on in my head, telling me that the 7.3 waste gate is basically wasting energy until it closes off at some particular altitude.
Do I have that right?
I learn something new everyday. Thanks.
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From: Isanti, MN
Posting Guru
Joined: Jun 2005
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From: Amarillo, TX
You sure are what?
And I did not read the other 1500 replys to this thread but have you ever driven a PSD or pulled with one? Or what and how often do you pull with you V10?
And I did not read the other 1500 replys to this thread but have you ever driven a PSD or pulled with one? Or what and how often do you pull with you V10?
Senior User
Joined: May 2004
Posts: 407
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From: Humble, Texas
I think he's saying that he is running stock.
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From: emporium
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Post Fiend
Joined: Mar 2009
Posts: 11,798
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From: Mt. Shasta California
That's another matter of opinion type thing. If I never had a diesel I might like the sound.................king of like developing a taste for limburger cheese (which I do like). But for now , the V-10 sounds good ; Grrrrrrroooowl.
Posting Guru
Joined: Aug 2009
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From: Union Lake MI
I pull a #3200 tandem equipment trailer. #15,000 it is a Dynaweld & a 12,500 Mini excavator, Also a Case 1845c #7000 with attachments, & a Case 350B Dozer #9,500 all over town, Stock truck just turned 100K, Might be time for a tune up. The mini I can feel back there,
.
As for the sound when it spools up it is bone stock not much sound. Mobil 1 ever since the first 6000 miles on the 3rd oil change. New exhaust studs & Muffler is all I have ever done to it. OBTW I did replace the rear springs with 1 ton packs 5 years ago, I forgot. The V10 studs do really suck tho...
This truck out pulls the 97 F350 = 7.3 That is the main reason we got it. That & we used to plow snow with it, PSD are no good for snow removal, in the turbo too much. As for stock to stock the 99 V10 was the winner 10 years ago...
When you run a machine all day you do not want to jump in one to drive home, It sounds cool for the younger kids...
PS: I would never own a 6.0 or a 6.4 too many problems.
The 7.3 is the way to go if you are going to mod it
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Never heard a dozer or cement truck sound like this:
http://www.youtube.com/watch?v=HBY6YCS-8T0
http://www.youtube.com/watch?v=HBY6YCS-8T0
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
It is lacking on the low end, and with these gears I can not get the revs up to peak HP tell about 35mph. Once I have gotten up to that speed, I can keep up with traffic easily.
I tow 2-4 times a weak, most loads about 15k gross.
I have driven a 7.3, 2 V10s and a 5.4. All 98 or 99.
The 5.4 with an empty trailer was pathetic.
The 7.3 has a lot more at low rpm, but the V10 in the right rpm range pulls much harder.