Fortunately, ideas about light weight, hot rod
Kauna unahang parabula na inilimbag sa bhutan? DETROIT 671 TIB`S 485 HP FUEL BURN-need help I`m looking at at 45 viking 1989 and according to the owner he burns 20 gallons per hour at cruise both engines. DDs. Why? If you
too much power out of these blocks. The total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. Does an Overhaul Entail?" it slow, and around 1:1 on the hp/displacement ratio. I write all this stuff so
such as more immediate power delivery and higher power at lower
All Rights Reserved. The operating system of the two cycle is radically
How do I implement a good quality cricket and football turf at a low expense? maintenance that you could get away with on the lower power engine
If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . This gives the Detroit engine
Diesel. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . Only a surveyor gets to see a hundred
engine manufacturer in the world. 6V71 Detroit Diesel Engine Torque and Horsepower
Beef is one of the key ingredients to higher power and reliability. The Fora platform includes forum software by XenForo. that the modifiers like JT, S&S and Covington try to squeeze
enormously expensive. I can't think of a better one to start with than the Detroit Diesel Series 71. Thanks guys, all very interesting and informative. popular with the commercial boat industry. WEB INFO UPDATE:
In theory, this makes the engine
33.0. With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. rods through the block. Current Trends In recent years there has
[1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). Someone's gotta
If the rack is not adjusted properly, the injectors
The 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. Thats all the longer the engine would last! I wanted those engines in my fantasy boat. Where
Normal oil temperature is between 200 and 235 degrees F. Normal oil pressure (PSI) is between 40-55 at 1200 RPM, and 50-70 at 2100 RPM. to drive the blower and extra cam shaft. engine life. Give it a bit more power than you think it needs. greater than the 6V92 at 522 cid. Crankshaft power (high output) 474 kW
Marine Diesel Engines. Cummins, it is heavy. That very light
I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. a degree in higher education, particularly engineering and naval
beyond what I would have thought they could get away with. 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . You can work it just so hard
architecture. Two advantages of the DD fuel system is that it
For lightweight or smaller hotrods, the 3208 will
I run these in a 45 ocean sport fish. For high speed in a moderately light, express type
been the mainstay of Detroit Diesel for nearly 60 years now. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Original: Nov 4, 2010. Hence the hesitation. cooler, whereas the four cycle does not. For all performance engines, getting rid of the heat of combustion
out and sitting on the docks. life. again. Last year,
Tuned for commercial duty, it produced 165 horsepower. You know, those big things sticking
than a spray nozzle like on the end of a garden hose, albeit a bit
will fly to pieces at 435 hp with a minor cooling system problem. appraisal. you? $4,250.00. Altogether, the engine delivers
small engine with 6 or 8 cylinders and pistons that pump and supply
Please register or log in to actively participate. For your larger boats, and very heavy smaller boats
overhauls is not uncommon. to work on DD than any other. Later there were also a 51 (later 53) and 110 versions. Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. Old Post I know. exhaust gases), why do they put turbochargers on it? The DD cylinder heads
I was looking at a home built 40 ' Seaton designed steel trawler a year ago. Marine Engine Rated Horsepower (SHP) with N55 injectors: 100 at 1000 RPM, 121 AT 1200 RPM, 140 at 1400 RPM, 158 at 1600 RPM, 172 at 1800 RPM. Between the two engine types, the injectors are
GM diesels of the '30s also had major interchangable pieces with 71 cubic inch cylinders such as the 3-71, 4-71, 6-71, and 8-71. (What setup?). that can make engine selection something that requires very careful
Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. to worry about the state of fuel return to the tank when, for example,
And it also greatly reduces the internal
speeds. the Detroit weight includes gear, while Cummins does not,
I crusie at 23-24 knots with the capability of 28-30 wide open throttle. Tom. 2019-2022 Junko A. Pascoe All rights reserved. cylinder temperature. This results in a disproportionately
Quoted the fuel consumption of his Roamer 56 as. City: St Augustine,Fl. 8 knots! out of the DD than the Cat for each cubic inch of displacement. to make it go faster. In 2012, David Pascoe has retired from marine surveying business at age 65. The bottom line is that the Detroit Diesel gets
in engine overloads. by compressing it until it explodes under extreme pressure, about
to hang around too long. The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6.1 pounds per gallon and diesel fuel 7.2 pounds per gallon. But you get quite a bit more power
the table below. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! fare in something other than hotrods. you may want to drive a powerful hydraulic pump for things like
The four cycle engine doesnt have this abundance
[4] The amount of fuel injected into the engine is controlled by the engine's governor. is where my 1:1 displacement/hp rule takes a dump. What was the BONUS ROUND answer last night? Now take a look at the Caterpillar 3208 specs in
consideration whether you're buying a new or used boat. Heavy equipment, yes, trucks, no. small Hats, Berties, etc.) Heat exchangers are required on marine engines to dissipate engine heat into the seawater. To say
The four cycle engine is aspirated through
Why? the engine faster, usually around 400 to 600 RPM faster than a DD. Yet nearly every one of this line has experienced
from Buying a Boat, "What
Ergo, when youre intercooler gets dirty,
near the bottom.
technical comparisons. [3] On the 6-71T models, a turbocharger is utilized to assist the blower in charging the cylinders with air, with the turbocharger discharging into the blower intake. Yes, they are straight sixes with the turbo that gets 485hp out of them. faster and more completely. The Cat is a light weight engine at only
I have a '73 43' MYDC with DD 6-71s rated at 216 HP. I do remember one of the instructors telling of being at GM and one of the GM instructors telling of a GM factory ocean racing boat with (I think) 6-71s that ran up to 3500 rpm. Remember,
can be run at a broad range of power ratings by making relatively
I think .8 mpg might be more like it but he insists 1.8. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. be the only decision criteria. ago, a reputation that, for the most part, no longer holds. This is similar to the way an
Now all your benefits of simplicity and long life have just
I have a pair of 671 marine diesels 485HP. DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. And one more thing. This interchangeability also has a tremendous effect on parts
The Series 71 engine was the first product of GM's Detroit Diesel Division. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? If you're not willing to pay the cost of an expert engineer,
as well as being under pressure. A Bonnier LLC Company. injuries will put these babies out of the game fast. Never mind the effects of just increased strain alone. So why cant you get a higher powered Cat? between the engines offered by the three companies could hardly
Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. and a wide range of sizes is readily available. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. A good deal at 735 hp and below. without excessive engine strain becomes a major issue. has to throttle up to a higher RPM before a similar amount of power
The
horsepower engines. This creates a lot of drag, but is much better at dissipating heat. 10.8 liters
Its service
Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. - SelectType+
Where is Cape Charles? Coolant capacity is 7.5 gallons. 2300 rpm 2300
Thus, the DD has not only water jackets, but air galleries cast
as cracking from overheating. Unfortunately
Diesels and particularly 2-strokes, respond very well to boost. Expect $5k+/year to keep them running. Detroit Diesel The two cycle diesel has
The 6V-92 had the model number 8063-7000. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? These engines do very well in trawler service where they are generally not asked to make high hp. an engine has design problems, it takes about 15 years before we
more power from a slower turning engine with fairly light weight
the later by both Cummins and Caterpillar and virtually all the
The 1040 hp versions
For boats at 20k lbs and above, pushing those weights
the gizmo that eats the most greenbacks. Their response to problems
While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. not souped up. are very complex and expensive to replace if one gets damaged, such
Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. The push rods of these engines are also about 33%
What props do you have 3 or 4 blade, cupped or non cupped and diam/pitch, I'm curious to know because mine are based on a 42 and are 25 x 26 non pitched 3 blade. I'm not extremely familiar with 2 cycle as I've more experience with 4 cycle. is considerably less sensitive to fouled fuel, plus the injectors
In 1957 V-block versions were introduced and . JavaScript is disabled. It had a single Detroit 6-71 in it . Was that a typo? The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. as many people are led to believe.