Think your Cummins is powerful?

[Bruce Beard]

We are about 2 weeks from getting a new trawler that is powered by a Cummins 6.7 QSB engine.
This Cummins is the 480 hp version and out of curiosity, I went looking for the specs...
Holy cow, this thing produces just shy of 1200 pounds feet of torque at about 1600 rpm!
I hope the ZF transmission behind it is up to the task!
Bruce

https://cumminsengines.com/uploads/...es_FR94127_480_3300_HO_PC_Tier3-02OCT2013.pdf

 

[Kry226]

It's amazing what can be done when you're not facing the same EPA and cooling limitations as the pickups, huh?

 

[jhenderson]

It must meet tier three marine standards which are pretty stringent and requires SCR . Having a whole ocean to cool it is the biggest plus.*

 

[Bruce Beard]

It must meet tier three marine standards which are pretty stringent and requires SCR . Having a whole ocean to cool it is the biggest plus.*

It is tier 3 certified but it does not utilize SCR. I have no idea what tier 3 regulations are compared to the on road EPA regulations our trucks conform to but obviously they are different.
I do know that the tier 3 standards were stringent enough to eliminate entire engine families though so it isn't a walk in the park...
Bruce

 

[Bruce Beard]

It must meet tier three marine standards which are pretty stringent and requires SCR . Having a whole ocean to cool it is the biggest plus.*

It is tier 3 certified but it does not utilize SCR. I have no idea what tier 3 regulations are compared to the on road EPA regulations our trucks conform to but obviously they are different.
I do know that the tier 3 standards were stringent enough to eliminate entire engine families though so it isn't a walk in the park...
Bruce

 

[Vt Redneck]

It's amazing what can be done when you're not facing the same EPA and cooling limitations as the pickups, huh?

Also, HP and torque applied to water puts a bit different load on the engine vs being applied to solid ground. In my experience marine diesels are almost always available in higher HP and torque ratings than their land locked twins.*

 

[Newsa]

We are about 2 weeks from getting a new trawler that is powered by a Cummins 6.7 QSB engine.
This Cummins is the 480 hp version and out of curiosity, I went looking for the specs...
Holy cow, this thing produces just shy of 1200 pounds feet of torque at about 1600 rpm!
I hope the ZF transmission behind it is up to the task!
Bruce

https://cumminsengines.com/uploads/...es_FR94127_480_3300_HO_PC_Tier3-02OCT2013.pdf

I guess the turbo spools up much better at 1600 RPM. Likely different turbo and programming.

 

[Wayne M.]

Wow those are soome numbers! Who knows what the reliable limit is of this engine! Truly the king of small HD's.*

 

[TFucili]

That's pretty impressive.

 

[Killer223]

it's nice. imagine if we had the cooling capacity of the ocean, the HP and TQ they could put in these trucks then!!!
yes tuners "unlock" more HP and what not, but you can't put at 100% all day long at those number or the engine will melt down, however the ocean cooled ones can. imagine having a steady supply of 50-60 water.... awesome!!!

 

[TCDiesel]

Someone please correct Me if I'm wrong, the engine is rated at Higher HP in Marine applications, BC the hardware is only set to use 80% of that HP , Example the Prop is designed to Use only 320HP MAX at 1800 RPMs and the engine is rated at 400.

 

[Bob4x4]

High Output (HO): Intended for use in variable load applications where full power is limited to one hour out of every eight hours of operation. Also, reduced power must be at or below
300 rpm of the maximum rated rpm. This power rating is for pleasure/non-revenue generating applications that operate 500 hours per year or less.

 

[Bruce Beard]

High Output (HO): Intended for use in variable load applications where full power is limited to one hour out of every eight hours of operation. Also, reduced power must be at or below
300 rpm of the maximum rated rpm. This power rating is for pleasure/non-revenue generating applications that operate 500 hours per year or less.

That is correct. When I asked about the 500 hour limit, I was told that it is not a restriction on the number of hours that the engine can be used but rather a classification of "typical" use... I suspect that 500 hours a year is way above what most trawlers put on their engines...
Another interesting tidbit that I've uncovered was that you can predict the lifespan of these based on the number of gallons of fuel burned. Makes sense if you think about it.


*

Someone please correct Me if I'm wrong, the engine is rated at Higher HP in Marine applications, BC the hardware is only set to use 80% of that HP , Example the Prop is designed to Use only 320HP MAX at 1800 RPMs and the engine is rated at 400.

I really have no understanding of how propellers work. I have read articles and tried but somehow I do not see the big picture.
No question that there is a very different reality than our trucks experience...
Bruce

 

[Bob4x4]

It is tier 3 certified but it does not utilize SCR. I have no idea what tier 3 regulations are compared to the on road EPA regulations our trucks conform to but obviously they are different.
I do know that the tier 3 standards were stringent enough to eliminate entire engine families though so it isn't a walk in the park...
Bruce

Spec sheet shows tier 2 for nox that should explain no scr

 

[Cummins12V98]

They claim the 2019's with ZERO engine emissions will have 10 percent more HP 385 x 1.10 = 423.5. *They also claim 20% increase in TQ 900 x 1.2 = 1,080. *We will see!

 

[Newfy]

We fish alot, friend has a house right on the Manasquan River; a big year will see 200 hrs on engine.