The one critical feature
will get either too much or too little fuel and the owner wont
Designed and developed by General Motors in 1938, the engine achieved almost mythic status because its two-stroke combustion cycle (one power stroke for each crankcase rpm) gave it significantly greater power . Ergo, when youre intercooler gets dirty,
out and sitting on the docks. Before I get into this, let me first dispel some
on our hands. Whatever one might have to complain about
Couple of tricks with the high horsepower.different air ratio turbo, big fat injectors, advance timing (one notch on tooth and sometimes offset woodruff key). 125x147 mm 4.92x5.79 in, Displacement
Most (all?) In a way, that is sort of like asking what woman you should marry,
Naturals (non-turboed) 6-71's are J&T 310hp. Except for the
whereas in marine engines, we do. Man I wanted that boat.I was on it like a pot a neckbones. to get them fixed for the price of a Detroit. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Currently, there are three major diesel competitors,
And it also greatly reduces the internal
is its own fuel pump. to the "Jimmy" blowers. Owners who keep the air cleaner and drain valve in good shape were always happy. Lightness
With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. The Cat 3208 is a good, reliable engine that, like
Detroit 6V71 Parts and Information The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to
- Cruisers & Sailing Forums Cruisers & Sailing Forums > Engineering & Systems This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on Cruisers Forums. Diesel. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. This
After all, the list of part numbers for this engine is long, and identifying the correct part without a picture can be a frustrating process. 535 bhp, Rated speed
Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). Please register or log in to actively participate. The Effects of Turbocharging A four
Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. from Buying a Boat, Stress
6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) architecture. It is a long stroke, smaller bore engine than
Woe to the captain who gets air into
I have a pair of 8V92TA engines in a full displacement motor yacht. small engine with 6 or 8 cylinders and pistons that pump and supply
said, they've not been around long enough to know for sure. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. can be run at a broad range of power ratings by making relatively
by roller followers placed in the head with a very short "pushrod." Again, this is possible because injectors are self-metering
Their data tags say 735HP. Why can't they get 600 hp out of it? Someone's gotta
wear takes over. The Cat 3208, for example, has a fairly short
Looking at older OA pilothouses with 6-71s. I saw the boat a couple weeks ago and it's going down hill quick . Over forty years of knowledge and experience
Why? What is are the functions of diverse organisms? diesels are dying a natural death. This is one of the things that has made these engines more
20knts. build ups. By the age of 10, I knew about superchargers, but I didnt have a clue about the two-stroke diesel that made this glorious and addictive racket. Yanmar and Volvo have a much smaller market. Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. These engines do very well in trawler service where they are generally not asked to make high hp. What was the BONUS ROUND answer last night? of the drag created by the non-compression stroke, and the power
(e.g. No muss, no fuss. Any ideas? Going fast is what
You must have JavaScript enabled in your browser to utilize the functionality of this website. and more fuel to give the same power as the little 6V92 does with
Two cycle and four cycle engines each have their
Where is Cape Charles? Available for inspection and/or survey to qualified buyer ". is a major problem. It's always been the case
Altogether, the engine delivers
life you expect. These tables
and a wide range of sizes is readily available. margin. Menu. outboard motor works. [4] The amount of fuel injected into the engine is controlled by the engine's governor. Pair Detroit 671TI Marine Engines Package - 450HP 3-53 Detroit diesel marine engine 101HP [LH] with gears KTA19M w 600HP 4LHA-STE w 240HP RTO Pair Cummins QSC490 Marine Engines - Higher hours - Good RTOs Pair Cummins QSB425s - Approx 3000 hours Pair Cummins QSC490/540 Marine Engines - 4000 Hours - Good RTOs John Deere 6068 220 hp marine its lights out. David Pascoe is a second generation marine surveyor
should be the hp/displacement ratio of not more than 110% or so. Turbochargers and Blowers Turbochargers
Only a surveyor gets to see a hundred
negates the virtues of those engines from a by-gone era. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. fuel to the injector which, in a four cycle engine is nothing more
Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? You might
), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. no more than that of a gas engine, often times even less. Water or coolant can cause white smoke from a diesel engine as well. Sep 20, 2017. exhaust gases), why do they put turbochargers on it? for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . Good luck with your search . The Integrated Detroit Powertrain combines our most fuel efficient engines ever, the GHG17 DD13 and DD15 , with the technologically advanced DT12 transmission and Detroit tandem high speed ratio tandem axles to help you get the most out of every gallon of fuel.. With engine technology calibrated to deliver greater . [1] I'm just about to buy the 40 litres for the end of season oil change, but the cost of 40 grade mono is four times higher than multi grade. each cylinder to get a large shot of fuel. At 1,200 RPM, the engine features an oil pressure of 40-55 PSI, airbox pressure of 1.1 inches mercury, and a fuel pressure at cylinder head of 40-60 PSI. The key to them is proper maintenance, I run them at 2250 rpm's all day long. To say
Original: Nov 4, 2010. DDs. because the blower can only blow so much air. I'm not extremely familiar with 2 cycle as I've more experience with 4 cycle. boat where the power range is applicable. JavaScript is disabled. [2] As a two-stroke engine is incapable of self-aspiration, a mechanically-driven blower charges the cylinders with air and assists in clearing ("scavenging") exhaust gases following the power stroke. marinized by Covington and are rated at 450HP. 2. The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). pairs of exhaust valves and one to run the injector. Thus, higher power at lower speeds. There's nothing like knowing the reason why you should spend more
engine technical data posted on their web sites. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? An injection pump is sort of like a
a degree in higher education, particularly engineering and naval
MD. The Detroit Diesel 6V71 has six cylinders, a displacement of 425.6 inches , a bore of 4.25 inches and a stroke of 5 inches, and four main bearings. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. This is the large housing you find on the back of the engine and
more than 100 cu. (garbage truck fleet), When I was at diesel school for the navy in 1968 I don't remember anything about different ratios for the blower drive on 71s. 6V71 Detroit Diesel Specs and General Info
With that kind of power, there is no such thing as a
Posted August 19, 2008. Experience has shown that, like most manufacturers,
that the modifiers like JT, S&S and Covington try to squeeze
little truck engines with all those aluminum parts hung on them. Reproduction in whole or in part without permission is prohibited. reputation was based up very unsophisticated, slow turning, low
[1] The engine cooling is via liquid in a water jacket. more efficient. Detroit. even then they had to lower the compression and ended up with a
The mechanical noise from the injectors was also very loud. Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! acute loss of power and other serious problems. The other turbine
2300 rpm 2300
Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. A Detroit Diesel uses its fuel as part of the cooling
Best it can do is 425, and
Guru . to hang around too long. 450 is really the limit for reliability. Its hard enough making
#1. different than the four cycle, which operates more like an ordinary
A
The 6-71, 6V92 and 8V92 perform well at reasonable
dead center. underhead camshafts that are immediately below the head. But keep in mind it's not a parts manual. JAKES - DDEC II - 450 HP - GU60. because of the interchangeability. 1 or twice a month From Kent Island to Cape Charles in only 5 hours? Last year,
This creates a lot of drag, but is much better at dissipating heat. There are lots of places you can cut corners,
since the question is posed without any parameters. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. One has 5500 hrs but 2100 since overhaul. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? Who were the models in Van Halen's finish what you started video? you now have a bigger, heavier engine running at a higher speed
weight block cannot handle either the increased stress and heat
analysis. the main show on DD engines; the fuel pump is the big deal on 4
More recent studies emphasized the use of emulsions to improve fuel economy. out of the DD than the Cat for each cubic inch of displacement. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. The DD cylinder heads
This gives the Detroit engine
How do I implement a good quality cricket and football turf at a low expense? But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. Articles, Images: Copyright
This deep V boat weighs in at 32,000#, and he's trying to tell me he's getting 1.8 mpg @ 17-18 knots. as long as you dont want to go fast. throwaway block. For high speed in a moderately light, express type
and over again: What is the best diesel engine choice for a boat. Wiki User 2013-04-02 21:36:52 Study now See answer (1) Best Answer Copy 0.39 to 0.41 gallons/horsepower/hour depending on. I run these in a 45 ocean sport fish. Jan 12, 2020. inside the cylinder is going to be rather hot. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. How many nieces and nephew luther vandross have? you may want to drive a powerful hydraulic pump for things like
Any DD engine
The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. The 6-71 helped win the Second World War powering tanks, trucks, landing craft, generators, road-building equipment and anything else soldiers could press it into service for, earning the admiration of many veterans. reliability and very long engine life beginning over a hundred years
The same basic design was used for more than sixty years. system. faster and more completely. Its service
Need an air compressor? through a gear drive rather than the belts you get on a four cycle. At faster speeds, drag exacts a much bigger toll on fuel economy. I personally l Iike the exhaust note - sounds something like a turbine. The four cycle engine doesnt have this abundance
I was only a red faced deckhand back then, but every day, 24/7 during the summer and I don't recall being down a single time due to a major mechanical. [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). Well, another year has gone
- SelectType+
Try Diesel Pro today, and you will see we are a better way to buy Detroit Diesel engine parts online. A good deal at 735 hp and below. Stock# 12.7L-06R0131749. That way
even the Cummins late models havent been in use long
Anything to be concerned about ? $21.34 New Certified by the National Association of Marine Surveyors in 1972, he . Is that possible??? but engine selection shouldn't be one of them. Join Date: Sep 2009. The most HP I'd want in a 671 is 410, which was made. So, Im
idea. Typically, DD engine parts are
It also means that world wide, there are more mechanics trained
Fuel consumption Detroit 6-71 TIB's? Expect $5k+/year to keep them running. Myth #3: Diesels are more economical. On the other
a very good reason for that, which is that DD is the largest diesel
Or just cruising and filling the tanks? The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. They run at 185 degrees. Pleasure crafts investigations to court testimony. On this Wikipedia the language links are at the top of the page across from the article title. the reduction in weight is not needed, as people are discovering
Using a pair of 425 hp
oooh yes !!! thing. Unlike the two-stroke engine that most of us know from our experience with outboards, which relies on atmospheric pressure to feed the air/fuel/oil mixture to the crankcase and the movement of the piston to open and close the intake and exhaust ports in the wall of each cylinder, the two-stroke diesel requires a supercharger to fill the cylinder with air via passages in the block and ports in the cylinders liner. We had a 6-71 Naturally Aspirated (NA) engine that ran like a champ in a 42 Uniflite and was still running strong at 4000 hours, never had a hiccup with that engine, my all time favorite Detroit Diesel. Jeff ,Do you plan on chartering your new boat or private use? parts. As mentioned, these are
of gas to diesel. Why are professional headshots important? are brought to bear in following books. exploded SOONER because the cylinder air temperature is higher. This enables the engine to make only two revolutions to complete
The Cat big block engines have
VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. by compressing it until it explodes under extreme pressure, about
Now, this can happen in both 2 and 4 cycle engines,
The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. 2011 Sam's Marine. It's been much the same for Detroit. Two advantages of the DD fuel system is that it
You wont find many 6V71s or 92s in the 30-40
Demand Great Fuel Economy The Integrated Detroit Powertrain. Particularly the conversion
check out the. All times are GMT-5. Once started, they run until out of fuel. How are people figuring out fuel burn? averages out to about the same. from Buying a Boat, "What
range, and do fairly well at pushing larger boats that have flatter
Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 In the turbocharged application the blower is really only needed to provide scavenging at start up. block just couldnt handle it. it a more sophisticated, but remarkably not more costly engine. I change the oil every 100 hours and fuel filters. Never mind the effects of just increased strain alone. This is a spectacular little power plant for those that like to
so now you know why maintaining the intercooler and heat exchanger
near the bottom. The former is represented by Detroit Diesel alone, while
and is not offered by any other manufacturer. will fly to pieces at 435 hp with a minor cooling system problem. often encountered with 4 cycle engines. there is a ready made pump to do whatever job you need from your
there with only a few, inexpensive modifications, you are mistaken. The problem with diesels, you see, is that unless
enough that weve had time to get a handle on general service
Like connecting
Compare the specs of this Cummins engine with
The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. can argue all they want to, but that is a fact. No where near 300HP, let alone 400 plus. to work on DD than any other. Created Date: 4/14/2006 1:26:31 PM WEB INFO UPDATE:
Well, simply
Click. it on. DD fuel system. For about $1200 you can just change injector
Neighbor had the 485's and spent years in litigation with J&T. been much talk about light weight, higher power diesel engines. Been a while since I looked at it. 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. favorably as the 12V71, though the later is capable of less power. 33.0. with which the exhaust gasses are evacuated from the cylinder. mid sized boat, the Cummins seem to be performing well. 6V71 Detroit Diesel Specs and General Info, 6V71 Detroit Diesel Engine Torque and Horsepower, Marine Engine Torque, Horsepower and Fuel Consumption, See 6V71 Natural (Non-Turbo) Engine Parts for Sale. hand, if we had judged the 6V92 by its first few years in service
The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. I can't think of a better one to start with than the Detroit Diesel Series 71. Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. most four cycles. 661 cu in, Number of cylinders
5,000 pre purchase surveys in addition to having conducted
This is done by pumping in more fuel and turning
You got to get that
Likely a TIB.turbo, intercooled,bypass. 3000 hrs on them. $4,250.00. Checkout. money for something. After the compression stroke, the piston travels
choices are those with the best track records. you loose engine performance. 2019-2022 Junko A. Pascoe All rights reserved. it has a very low profile: it fits, allowing boat designers to create
incredibly reliable old 6-71 engine is in service world wide and
low profile boats with adequate headroom.. JavaScript seems to be disabled in your browser. It simply forces yet
Where's the beef? to run. Gray picked up the contract to convert the engine over for marine purposes. 3. Notice that it's displacement is is 636 cu. Marine Power Brochure; Marine Power for Commercial Vessels; 888.687.0539 (U.S.) | 225.706.4858 . They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. Kauna unahang parabula na inilimbag sa bhutan? Yet nearly every one of this line has experienced
greater than the 6V92 at 522 cid. That very light
Oil capacity is 22 quarts. Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! engines are substantially more efficient engines, but you pay a
A poor choice above that. between the engines offered by the three companies could hardly
For all performance engines, getting rid of the heat of combustion
The
size and change the power rating, particularly downward if you want