QSB5.9 - 875 Ft Lbs from Cummins

[hammersley]

First time I've seen torque figures from the Marine Engine - this is a "New" venture with mercruiser..... http://www.cmdmarine.com/pdfs/4081898_0903.pdf

 

[Rosco]

Basically that say's if Dodge will build the right transmission we can put Ford and GM to bed for a long time. If someone can show me a Powerstroke or Duramax making that kind of power in a marine setting for thousands of hours on end and I will eat my Cummins piece by piece.

 

[RustyJC]

Like most marine engines, the key to these ratings is the sea water heat exchanger cooling systems. Having an infinite supply of 60-70 degF cooling medium for the intercooler, oil cooler, engine coolant heat exchanger, etc. pretty well takes care of any air density and overheating problems.



Rusty

 

[HoleshotHolset]

It doesn't mention it in that document, but those ISBe's have articulated pistons with steel up top... right where you need it.



Matt

 

[EMD Diesel Power]

Originally posted by RustyJC

Like most marine engines, the key to these ratings is the sea water heat exchanger cooling systems. Having an infinite supply of 60-70 degF cooling medium for the intercooler, oil cooler, engine coolant heat exchanger, etc. pretty well takes care of any air density and overheating problems.



Rusty

Rusty is quite right here, seawater is a great coolant--- and its endless..... as long as you dont go aground.



take the high-HP trucks in the TDR... . and rig em for seawater cooling, and I guarantee you there won't be much temperature problems... if any.



Jeff

 

[hammersley]

And don't forget they work a lot harder---

Pushing a boat than pulling a trailer (or our fat butts). Those marine engines are always running "up-hill" in that they are always working hard against the water - no coasting or downhill runs - or stopping.

 

[Joe G.]

Re: And don't forget they work a lot harder---

Originally posted by hammersley

Pushing a boat than pulling a trailer (or our fat butts). Those marine engines are always running "up-hill" in that they are always working hard against the water - no coasting or downhill runs - or stopping.

That's exactly right. A truck never sees the constant load that a marine diesel sees. When I was fishing we would leave Humboldt Bay headed for where ever the albacore reports said the fish were. Sometimes it was three days of throttle against the stop to get there. Three days around the clock of a jimmy screaming is enuff to make you jump overboard.

 

[HoleshotHolset]

"Three days around the clock of a jimmy screaming is enuff to make you jump overboard. "



I've never been through anything like that, but I have a feeling that I would want to jump overboard as well. :-laf



Gotta love the 2-stroke Detroits - just like has been said before: "... they do an excellent job of converting #2 into noise".



Matt

 

[HEMI®Dart]

Originally posted by Rosco

If someone can show me a Powerstroke or Duramax making that kind of power in a marine setting for thousands of hours on end and I will eat my Cummins piece by piece.

:-laf :-laf

 

[CATCRACKER]

somone put it to me like this the d/f b/t stress on a truck diesel and a marine diesel is like this. the stress on the truck diesel is like pulling a full load down a flat hwy doing 60 where with the same load the marine is pulling up a super steep hill while being floored. When my buddy was a coasty he told me they were constantly taking oils samples on there cummins. this ought to tell you the d/f my buddies dad has a 65 foot viking with twin detroit diamond series 1850hp engines in it what can an 18 wheeler pull with 550hp? by the way these detroit cost 85000 a piece. when they went to pick the boat up the guy handed to hats to his dad they said detroit diamond series and said each one of those hats cost you 85K. the boat itself cost around 3. 5 million. Some people make it big off of these chemical plants down here.

 

[A Johnson]

"Rating is limited to 1 hour of full power out of every 8 hrs of operation. "



Did you notice the 19. 9 gallons per hour fuel consumption.



A Johnson

 

[nickleinonen]

Originally posted by A Johnson

"Rating is limited to 1 hour of full power out of every 8 hrs of operation. "



Did you notice the 19. 9 gallons per hour fuel consumption.



A Johnson

and a locomotive going 75mph down the track with 15,000' of train behind it will use 200+ GPH



when making/using power, you use lots of fuel

 

[EMD Diesel Power]

Originally posted by nickleinonen

and a locomotive going 75mph down the track with 15,000' of train behind it will use 200+ GPH



when making/using power, you use lots of fuel

Quite true... got the fuel consumption charts around here somewhere for various EMD/GE locomotives. now just take that figure and do a ton/mile comparison and see just how efficient steel wheel/steel rail transport is... . compared to trucks. Its just that we can't build a siding to every doorstep. :-laf :-laf can't live without the other type of thing-- both industries coexist on each other. The railroads built this country though.....



here is a funny thing... . (even with the smaller 3k gallon tanks) if the tanks are topped off at the beginning of a trip... . the crew will die on hours before the units run out of fuel..... and that's assuming Run 8 operation (full throttle) for 12 straight hours. And there will be fuel to spare.



Jeff