Gas vs PSD
Junior User
Joined: Jan 2010
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From: peru,il
the only postive thing I will say is my PSD keeps running day after day and making money, we got prob 20 some welding rigs with them in it and they keep building america, the foreman just got his new f450 with the 6.7 and are awatin to see the results, the last f250 had the fantastic 5.4 and might as well had a donkey to ride
Elder User
Joined: Jan 2009
Posts: 696
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From: Melissa TX
But donkeys are very very very slow. And also I wouldn't want a donkey aka jackass as something compare to a engine.
Hotshot
Joined: Mar 2007
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From: Pa
Kinda sounds like an old 300 I6, eh.
Elder User
Joined: Apr 2009
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From: Spokane, WA
PickupTruck.Com - Part 1: 2007 PickupTruck.com Heavy Duty Shootout
Keep in mind, this is not a diesel magazine, so that argument is out. Also. these are F-250 srw cc gas engines against f-350 drw diesels. And yes the psd still outpulled the gas engine on the 15% incline. I would like to have seen them get up to 50 mph though... LOL
The other thing you gas guys gotta know about this test, is the way diesels perform, this is not their best scenario. They defuel when EGTs get to a certain spot, so running at 30 mph is not their strong suit, I don't even know of a scenario in the real world like this, all that matters to me is pulling at 70 mph.
What you are having a hard time with is understanding what tractive force is as well as what we are arguing. The reason the psd wins those shoot outs that the magazines do is because, like Bill said, they are over very short distances. That means that for the majority of the pull the v10 is being compared to the psd in the same gear and at the same rpms, where there is absolutely no comparison between the two(psd wins that hands down by a mile). Make it a longer hill and the v10 will be able to utilize its ability to stay in a lower gear twice as long and the results will be a lot different.
Just for comparisons sake, with both having a 3.73 and TS and going from a 2,000 rpm start in 1st gear, the v10 has a tractive force of 4,763 and the 6.4 is 7,542. By 3,000 rpm the v10 is 5,718 and the 6.4 is 7,097. The 6.4 is already a long distance ahead of it by this point, but it is now shifting to 2nd(and losing tractive force because of gearing) and the v10 hasn't even hit its power band in 1st yet.
What Bill, Tom, myself, Krewat, Sandman and Johnny (to name the ones you mention) are arguing is that the v10 is going to pull harder in 1st from 3,000-5,500 rpm than the 6.4 is going to pull in 2nd, so it is going to start making the ground up and eventually pass it because it will continue to be able to stay one gear lower and produce more tractive force. At normal highway cruising speeds, the v10 doesn't have to deal with getting the load moving from a dead stop or making the ground up it lost off the line, all it has to do is downshift one more gear than the psd and it can climb the hill just as good. You all may think it is screaming up the hill, going to catch fire, shoot a rod through the hood, etc, but all it is doing is utilizing the rpms where it makes the most power.
Just for comparisons sake, with both having a 3.73 and TS and going from a 2,000 rpm start in 1st gear, the v10 has a tractive force of 4,763 and the 6.4 is 7,542. By 3,000 rpm the v10 is 5,718 and the 6.4 is 7,097. The 6.4 is already a long distance ahead of it by this point, but it is now shifting to 2nd(and losing tractive force because of gearing) and the v10 hasn't even hit its power band in 1st yet.
What Bill, Tom, myself, Krewat, Sandman and Johnny (to name the ones you mention) are arguing is that the v10 is going to pull harder in 1st from 3,000-5,500 rpm than the 6.4 is going to pull in 2nd, so it is going to start making the ground up and eventually pass it because it will continue to be able to stay one gear lower and produce more tractive force. At normal highway cruising speeds, the v10 doesn't have to deal with getting the load moving from a dead stop or making the ground up it lost off the line, all it has to do is downshift one more gear than the psd and it can climb the hill just as good. You all may think it is screaming up the hill, going to catch fire, shoot a rod through the hood, etc, but all it is doing is utilizing the rpms where it makes the most power.
Hahaha
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
I think this picture sums up what the V10 guys were saying nicely.
While the Diesel gets the advantage at first, notice how the V10 continues to gain speed while the Diesel has leveled off?
While the Diesel gets the advantage at first, notice how the V10 continues to gain speed while the Diesel has leveled off?
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
I don't know why I thought that they got up to 50 and 56, I was just wrong.
There is a diffrence in being wrong and being a liar.
When did He EVER say that?
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
Just think of how far ahead the V10 would be if that was a 2 mile long hill.
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Elder User
Joined: Apr 2009
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From: Spokane, WA
I think any rational person realizes that 1) a 700 ft 15% grade is not realistic 2) these are not 2 comparable trucks 3) the v10 needed 4.30 gears to even be close and 4) the psd still beat it to the top of the hill.
Elder User
Joined: Jan 2009
Posts: 696
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From: Melissa TX
Yeah these gassers comes up with all these diagrams and so call facts. But the truth is if you take the exact same setup in a diesel and a v-10 the diesel would kill the v-10. Get a v-10 with 3.73's and see how it does with a diesel with 3.73's. Diesel FTW!!!!!!!
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
Both mine have 3.73s and they will still chew up and spit out the same age PSD.
Elder User
Joined: Apr 2009
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From: Spokane, WA
Chew up and spit out. Wow and yet you haven't proven that to us. LOL keep it up! Haha come on, when is a diesel gonna show Bill up in Texas. Ah Bill, nevermind, you probably won't even show. Hahaha
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
Yes, I would show. I want to meet a PSD owner and have a pull off, but there are not any close enough to me.
The only one has a very modded truck, and that would prove nothing.
The only one has a very modded truck, and that would prove nothing.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
The V10 came with 3 diffrent power ratings. I have the older, less powerfull models. If I had an 05 I would pull with a 6.0 or 6.4, but I have the older 97-99 and 00-04 heads on mine.