By the way:
What engines from the light truck series now used liner? FL has liner in 5 !!! different sizes.
I am German and I dont know in Europe no one middle class engine with liner .... Why not?
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Norbert
I gather the question is why not use wet liners? It comes down to weight. Without liners, the cylinder itself is structural and helps hold the cylinder head to the main bearings, which are trying hard to separate themselves due to gas pressures. Wet liners require the block to be structurally stronger as then the liner is not structural.
Dry liners have problems with dimensional stability and poor heat transfer.
And in mid range engines, most engines serve a full life without needing repair to the bores, so not much advantage in replaceable liners.
... once the throttle is set the RPM speed is maintained, even under varying loads. Top RPM is called "high idle" by Cat.
{QUOTE]
....power lever.
Andy G,
No one should be running their engines at WOT unless they are set up right and in good condition.
.
On a truck today a bigger diesel like a DD 50 or more common 60 will go 1,300,000 miles before the first overhaul is required.
This assumes OK maint and on time oil changes.
Wifey B: I'd love to drive my car at high speed sometime. Maybe like the Bonneville Flats. Heck, I've never done more than half it's max.
s
I think he actually runs his engines almost 50% and that's way more than many here.
I-75, 595, OR I-95 in Miami. No matter how fast you go, somebody will pass you.
155mph(CLK 55 AMG cabrio) is the best I've managed ,then was passed by a pack of sportbikes with girls on the back like I was sitting still!. They must have been doing 200, in a light rain, on a Friday night, in fairly heavy traffic, as they disappeared over the horizon.
Once in Miami back in the good ole days, a Highway Patrolman caught me, and offered me cash for the car(1972 280 SE 4.5)-on the spot. No tickets yet.
On the other hand , we were waiting and waiting for a Captain to show up from Ft. Lauderdale for a seatrial in Miami. Waited, waited, waited. Turned out he was in jail. Apparently the Highway Patrol thought that he should had noticed him with the lights and sirens on-for 9 miles behind him at 100 mph. Sigh, kid's , Vettes, and their cell phones.
Marin,
I got that from a post made by you several years ago saying you were burning 3gph on each engine.
Going by the fuel gauge that reads the day tank, we are using more like 5 gph. However, using a fuel gauge to judge fuel consumption is sort of like using Stonehenge to predict the weather. It may be close, but it probably isn't.
5 gph, is that for each engine? surely not.
Except for emergencies there are three reasons to run pleasure rated engines at WOT for a minute or so. Test engine, hull and running gear, test the cooling system, spend money and be stupid.
How may would be happy to have their car tested at wot for 15 minutes? what would it prove?
We run our CAT 3116 at WOT for about 10-15 minutes to clear the the mouth of the river into Lake Erie. We have the power, so why not use it?
Omg, if the engine fails do you go over the Niagara Falls?
The old Detroit's for all their faults were engines designed to run hard and be put away wet. If your look at the size of castings for the heat exchangers and manifolds and mounted hardware it is obviously built for the long run. The engines were modular and can be built asymmetrical, the four cylinder 453 uses a balance shaft to smooth the inherent four cylinder vibration, I believe the twin does as well. They are large engines for there rated horsepower. The draw back of the 53 series is they have 4 valve heads that usually need replacement around 8000 hrs. This was the last configuration of the so called two stroke Detroit's. I've owned three cylinder, ' V6 and inline four versions of this engine. I have never had one fail to start and give me another hard day of work. The Detroit's are a true industrial engine. The JD is an another example of an industrial engine converted from a tractor engine. Typically we felt that 8000hrs was the useful working life of a JD backhoe, Usually the engine was still going strong but the rest of the tractor was getting lose and transmissions and shuttles were ready to go. The idle vibration was annoying but once off idle they are a lot more pleasant to listen to than the Detroit. We used these in lifts, loaders and backhoes. The 3208 Cat and 330B Cummins are engines that were designed for somewhat lighter duty. The 3208 was used in light duty Ford trucks and the 330B started out as a AG pump engine. The 3208 has worked out very well as a marine engine and has proven it self over time. Time will tell if the 330B has the same creds.Scary that was an excellent post.
An old engine that's been over used for years and not taken care of or rebuilt when it's time can't be expected to haul the mail like it did when new. Taking care of anything that wears over time is "the cost of doing business". So even though I disagree w you to some degree I'm sure you're basically right. You obviously know more about it than me but I can't buy into needing to make big adjustments to how hard you run an older engine that's been maintained properly.
And some engines are just better than others .. Not thinking of the Lehman when I say that. I remember the Chrysler cars about 1950 had soft cylinders and so so rings. Cranks and inserts not very good either. Other brands of the time were clearly a notch up.
I think Marin's over the top but not really by much. I think he actually runs his engines almost 50% and that's way more than many here.
But thanks for the great post. We need clarity and objectivity here on engines.
ronlord,
You don't "fight" current. You either plan better or run along at a good speed for your boat and engine or go to plan B ... if you have one.
I've run for hours at less than 3 knots bucking the current and then in another hour run at 10 with the current.
Then why have such cars? Heck if I know.
Cars are sold worldwide , some places 150mph is just fine.
ronlord,
You don't "fight" current. You either plan better or run along at a good speed for your boat and engine or go to plan B ... if you have one.
I've run for hours at less than 3 knots bucking the current and then in another hour run at 10 with the current.