Gas vs PSD
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
They will run days on end at peak HP with no problem.
Its when you have poor oil pressure that its a problem...
Elder User
Joined: Apr 2009
Posts: 685
Likes: 0
From: Spokane, WA
Krewat, forgot to mention you stock diesel comment. Every stock diesel from about 2005 on is programmed to defuel long before it will blow up. Look at the rocky mountain test, they floored eack truck the entire 12 miles, did either blow up?
Cargo Master
Joined: Jan 2005
Posts: 2,413
Likes: 11
Diesels have less tq drop off from peak tq to peak hp, but once you rev them past peak hp you are losing power much faster than with a gasser. My 5.4 makes peak hp at 4,500 but it has virtually no power loss if I run it to 6,000. If you run a diesel 1,500 rpms past peak hp you are going to do more than just lose a lot of power.
If me and Exiled get to do our tests I had planned on this being one of our test runs. I don't want to video it and post it on here. I want a witness sitting beside of me videoing it so he can verify the load, hill, rpms, gear, speed, etc.
If me and Exiled get to do our tests I had planned on this being one of our test runs. I don't want to video it and post it on here. I want a witness sitting beside of me videoing it so he can verify the load, hill, rpms, gear, speed, etc.
Yes I would tell whatever you did with your truck you would want to be told.
Senior User
Joined: May 2010
Posts: 119
Likes: 0
From: Corpus Christi, TX
Let's see...5k rpm at no load for one minute...yep that equals a thrown rod, spun bearing, take your pick. Uh, don't do that...
For a tow rig, a gasser will never perform as well as a diesel. That's why you will never see an over-the-road tractor running a gasoline engine. They can't do the miles or pull the loads. Power curve and torque is not right.
For a tow rig, a gasser will never perform as well as a diesel. That's why you will never see an over-the-road tractor running a gasoline engine. They can't do the miles or pull the loads. Power curve and torque is not right.
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
Back your statment up.
Senior User
Joined: May 2010
Posts: 119
Likes: 0
From: Corpus Christi, TX
In my younger more exuberant days I had the joy of re-building a bored and stroked 327 that I did this precise thing to. But hey, whatever...hopefully you won't send the rod out the side of the block. Anyway, the gassers are OK and the diesels are OK too. Whatever floats your boat. I will say that a 5.4 gasser or a 6.0 diesel will not hold a candle to my 6.7 Scorpion diesel. ;0) 'nuff said...
Senior User
Joined: Oct 2009
Posts: 225
Likes: 0
From: dodge, north dakota
It was pretty funny this summer i was at a rodeo and this mini Freightliner with a 6 horse trailer was stuck beside us, and the guy wanted someone to pull him out. So along comes this 2003 F250 V10 hooks up to it, puts her in 4low and jst gives it everything it had, basicall just moanded and groned. So being the nice guy i am i unhook our 2007 F350 powerstroke and hook up to the truck. I put her in 4low built the turbo a bit and then the truck came right out. Not sayin our PSD is a powerhouse, just sayin that low end torque is real nice. Just thoght that i trough this on for some conversation.
Cargo Master
Joined: Jan 2005
Posts: 2,413
Likes: 11
It was pretty funny this summer i was at a rodeo and this mini Freightliner with a 6 horse trailer was stuck beside us, and the guy wanted someone to pull him out. So along comes this 2003 F250 V10 hooks up to it, puts her in 4low and jst gives it everything it had, basicall just moanded and groned. So being the nice guy i am i unhook our 2007 F350 powerstroke and hook up to the truck. I put her in 4low built the turbo a bit and then the truck came right out. Not sayin our PSD is a powerhouse, just sayin that low end torque is real nice. Just thoght that i trough this on for some conversation.
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Senior User
Joined: Oct 2009
Posts: 225
Likes: 0
From: dodge, north dakota
Brother there's a difference in the truck can't do the task and the driver can't do the task w/ the truck. Its understandable that he couldn't pull out the truck revving up to 5k. I see him spinning, fighting for traction. He shoulda just used as much ump needed to pull the truck out. His truck was more than enough to pull em out.
I know i just wanted to share my story. But it was a rather hard pull, the truck was down hill bout 10 feet and in bot 2 feet deep mud, and i was up on pavement so there was no spinning. Maybe its just my mad driving skills.
Elder User
Joined: Dec 2009
Posts: 882
Likes: 0
From: Ohio
Just a reminder. A certain someone claimed that a V10 would run 5000rpm for 20 minutes no problem, and then promptly blew one up trying to do it. (
) I'm assuming this person had enough confidence in the engine to give a go in the first place, but after failure is giving excuses for it's failure. Ok, maintenance history noted and accepted.If I recall there is still a V10 in the stable. One with a much better maintenance history. Now that preliminary testing is over when is the money run? IOW, back up your statement.
I know what a certain someone else would say. Run your PSD at redline along side me and I"ll do it. Thing is I don't recall anyone saying that the PSD would run at redline all day long, only that it wouldn't need to. The V10 camp though HAS made the claim that the gasser will crank 5k ad infinitum.
Personally I wouldn't run ANYthing at or near it's redline for any period of time what-so-ever. There's no way the ol' reliability / longevity graph doesn't take a serious nose dive under those conditions. There are miles, and then there are hard miles, and overall I believe one engine holds up a bit better.
And so......
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Posting Guru
Joined: Aug 2008
Posts: 2,313
Likes: 0
From: Sunny, Snowy, CO
Show me where I said ^ EVER, and I will mail you $20.00 cash. You can't. I said a V10 can't run at redline "all day long" like you, Josh and Bill have repeatedly said. We already blew Bill's up, and it only took 30 seconds or so...Who's next, you or Josh?
Posting Guru
Joined: Aug 2008
Posts: 2,313
Likes: 0
From: Sunny, Snowy, CO
Just a reminder. A certain someone claimed that a V10 would run 5000rpm for 20 minutes no problem, and then promptly blew one up trying to do it. ( ) I'm assuming this person had enough confidence in the engine to give a go in the first place, but after failure is giving excuses for it's failure. Ok, maintenance history noted and accepted.
If I recall there is still a V10 in the stable. One with a much better maintenance history. Now that preliminary testing is over when is the money run? IOW, back up your statement.
I know what a certain someone else would say. Run your PSD at redline along side me and I"ll do it. Thing is I don't recall anyone saying that the PSD would run at redline all day long, only that it wouldn't need to. The V10 camp though HAS made the claim that the gasser will crank 5k ad infinitum.
Personally I wouldn't run ANYthing at or near it's redline for any period of time what-so-ever. There's no way the ol' reliability / longevity graph doesn't take a serious nose dive under those conditions. There are miles, and then there are hard miles, and overall I believe one engine holds up a bit better.
And so......
.
.
.
.
) I'm assuming this person had enough confidence in the engine to give a go in the first place, but after failure is giving excuses for it's failure. Ok, maintenance history noted and accepted.If I recall there is still a V10 in the stable. One with a much better maintenance history. Now that preliminary testing is over when is the money run? IOW, back up your statement.
I know what a certain someone else would say. Run your PSD at redline along side me and I"ll do it. Thing is I don't recall anyone saying that the PSD would run at redline all day long, only that it wouldn't need to. The V10 camp though HAS made the claim that the gasser will crank 5k ad infinitum.
Personally I wouldn't run ANYthing at or near it's redline for any period of time what-so-ever. There's no way the ol' reliability / longevity graph doesn't take a serious nose dive under those conditions. There are miles, and then there are hard miles, and overall I believe one engine holds up a bit better.
And so......
.
.
.
.
Elder User
Joined: Apr 2006
Posts: 850
Likes: 3
From: West Granby, CT.
yeah....this thread keeps going & going & going .....Yet i keep coming back to read it or something? not sure what i read yet? maybe mine is bigger than yours?
It's funny its a v10 vs psd yet the almighty 5.4 keeps getting brought up?
It's funny its a v10 vs psd yet the almighty 5.4 keeps getting brought up?
Cargo Master
Joined: Jan 2005
Posts: 2,413
Likes: 11
You obviously have never driven a diesel with a load as your remarks completely expose you. Egts are a factor of the amount of fuel, not rpms. If you drop a gear and maintain the same speed on a climb, egts go down. So I can be at redline and egts will stay at 600degrees or whatever, but be on a climb at 50 mph and 1,600 rpms and at 1,300 degrees. Then shift down two gears, increase speed and have egts drop to 1,100.
Thanks for exposing your knowledge of the subject.
Thanks for exposing your knowledge of the subject.
This being said how. Long can you hold out at 1300*? If EGTs doest back you off the trans mission temps will. I got 190* in no time when I was empty holding in 3rd. I would hate to see what would happen if loaded.
I'm going to research this. And as it always does this just may end up me trying stuff out on the road. I will be willing to post my findings if yall would like me to.