Gas vs PSD
Elder User
Joined: Apr 2009
Posts: 685
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From: Spokane, WA
Just to toss this out there, a turbocharger operates off of engine speed, not necessarily pedal distance or towing needs. The turbocharger spins off of the exhaust gasses exiting the engine, true that the harder you press the pedal the more a turbo will generate boost since the RPMs will increase, but it is a direct relationship to the amount of exhaust the truck puts out which is in turn in direct relation to the RPMs of the truck. You can generate more boost by flowing more air VIA less restrictive exhaust and intake, head work, etc., or by changing the setting on the bypass valve to adjust when the excess boost is blown off (aftermarket turbos, stock PSDs don't have these valves), but in the end the compressor is only able to produce it's max air flow pressure. Ultimately, the boost levels are directly associated to the engine speed, and therefore is limited to the flow of the compressor and the speed of the engine. Just my $.02.
So, yes weight is a factor.
Elder User
Joined: Jan 2009
Posts: 696
Likes: 1
From: Melissa TX
I figured it out guys...
You just can't fix stupid.
No matter how many facts and how much data is presented,they just choose to be stupid.
First my "Gasser tune" can't make any more power according to him, then, he's acting as if my tune make it some HUGE advantage over a 6.4L truck. Which is it? Whatever's convenient to be a ***** at the time?
JL
You just can't fix stupid.
No matter how many facts and how much data is presented,they just choose to be stupid.
First my "Gasser tune" can't make any more power according to him, then, he's acting as if my tune make it some HUGE advantage over a 6.4L truck. Which is it? Whatever's convenient to be a ***** at the time?
JL
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
I think some gassers who have never driven a diesel don't know how this works. The point is, when I am unloaded at 65 mph, my boost is 5psi on flat ground. With my toy hauler attached, it is at 18psi or so. Same rpms, engine speed, and amount of air.
So, yes weight is a factor.
So, yes weight is a factor.
I figured that out a long time ago about you gassers. You even admit that you guys have to bring facts and data in here to try to convince us that a v-10 can hang with a diesel. Us diesel guys don't have to present anything cause we know the truth. The diesel is the better option for heavy towing. But if it makes you feel better and sleep at night continue with your so call facts and opinion but we all know the truth.
Elder User
Joined: Jan 2009
Posts: 696
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From: Melissa TX
Also here in the Dallas area I see ALOT more diesel hauling and towing stuff then I do gas super duty's. Hmmmmm......I wonder why? The only gas engine super duty's I see around here are older ones that they always have a empty bed. Probably cause they don't like the 6-8 mpg you get when towing.
Elder User
Joined: Jan 2009
Posts: 696
Likes: 1
From: Melissa TX
Oh my god LMMFAO my less powerful engine. Man your engine only dreams of what my engine makes. I would do circles around your truck if we ever towed or race each other. LMAO
Posting Guru
Joined: Aug 2008
Posts: 2,313
Likes: 0
From: Sunny, Snowy, CO
Yes, he would produce more hp with 2k more towing or in the bed of the truck. Cruising down the road, the engine isn;t producing anywhere NEAR max hp or torque. Give it more gas (just to give Krewat a stroke) and the boost rises, hp and torque does too.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
Your truck stock made less power than a stock 3V V10.
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Lead Driver
Joined: Jul 2007
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From: Rhode Island
I think some gassers who have never driven a diesel don't know how this works. The point is, when I am unloaded at 65 mph, my boost is 5psi on flat ground. With my toy hauler attached, it is at 18psi or so. Same rpms, engine speed, and amount of air.
So, yes weight is a factor.
So, yes weight is a factor.
You would see the same thing with a V10 (except it would be vacuum not boost) Unloaded 65mph down the highway you might see 15mmHg (just made up numbers here) of vacuum, towing a trailer you might see 3 mmHg of vacuum.
If your max boost is 30 PSI, and you go wide open 30 PSI is all you are going to get. As soon as you hit 30 PSI, that is basically indicating your engine is at full load. It doesn't matter if you have 15 or 15,000 lbs behind you, that is all your engine has to give.
Your sort of get it, except in that 6.4 acceleration video he was to the floor, wide open, pedal to the metal. There is no more throttle to give. That is all the engine has to offer no matter how much weight is behind him.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
That just proves that the 6.4 pulls better than the older V10s.
I am talking about the 3V, which was not in that test.
So at WOT with 19,000 he is making less power than WOT with 21,000.
I am talking about the 3V, which was not in that test.
Posting Guru
Joined: Aug 2008
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From: Sunny, Snowy, CO
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
It makes more at the flywheel and at the wheels.
How would the same tranny and axle in both trucks take more power from one than the other?
How would the same tranny and axle in both trucks take more power from one than the other?
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas