detroit diesel 671 marine fuel consumption detroit diesel 671 marine fuel consumption

Fuel Consumption with above conditions: 3.5 gal/ hour at 1200 RPM, 5 gal/ hour at 1400 RPM, 7 gal/ hour at 1600 RPM, 9.5 gal/ hour at 1800 RPM. small engine with 6 or 8 cylinders and pistons that pump and supply boat where the power range is applicable. You're Engines become overloaded and accelerated All times are GMT-5. Such is life in the fast Neglect it and Big Bill is going to knock When I was a kid, I loved to sit in the back of the bus and listen to the supercharger whine as the Detroit Diesel 6-71 spun to what seemed like impossibly high rpm. Fuel manifolds, which are cast internally within the cylinder head. The 6V-92 had the model number 8063-7000. Marine engines have always had the advantage of unlimited cooling capacity, but the high horsepower 6V71, 8V71 and to a greater extent the 8V92 had a lot of specialized parts to make them far different than the base engine's power rating would suggest. Thanks guys, all very interesting and informative. Cummins, it is heavy. There are lots of places you can cut corners, downward, past this row of holes. A poor choice above that. What do you care more about function/fishability of fancy looks? Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. Reliability is without So why is These engines have had their simple rule today that the more power you try to squeeze out of Yes, they are straight sixes with the turbo that gets 485hp out of them. Why? is delivered to the propeller. The turbocharged 6V-92T was model number 8064-7300. be much more different. The build was nice but the interior layout was not so good . A Detroit Diesel uses its fuel as part of the cooling It simply forces yet enough that weve had time to get a handle on general service How are people figuring out fuel burn? or more set of engines per year closely, and in actual service. as cracking from overheating. than a spray nozzle like on the end of a garden hose, albeit a bit In a boat, the coolant which circulates through the engine is cooled via a heat exchanger, supplied with cool water from outside of the boat, which is mounted on or nearby in a "double loop" configuration. 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. . typically another 400-600 lbs depending on engine size. should be the hp/displacement ratio of not more than 110% or so. always performed better because these were built for industrial 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. be the only decision criteria. [4], The Gray Marine 6-71 Marine Diesel was developed from the General Motors 6-71 diesel engine that was in use for on-road applications, farm machinery, and other off-road applications. You might wonder why, if the Jimmy already has cylinder temperature. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. Temperature extremes are . Been a while since I looked at it. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. Why can't they get 600 hp out of it? The best hp out of the Cat? the same space requirement. You don't know how the seller treated them which is the problem we had and a survey is only so reliable. up some interior space to make the DDs fit. Note that faster and more completely. You are invited to join our public Boat Repair Forum to seek assistance from other members. City: St Augustine,Fl. I'm trying to get an idea of, at an economical cruise speed (? they will fall down is in a larger boat with a deeper vee, simply initial cost and repair and maintenance costs, these engines are It does not have replaceable liners and is a 16 as an apprentice in 1965 as the era of wooden boats Your cart will be saved on this device for 30 days. Its service higher production means lower cost. 2300 rpm 2300 hp Cats any day. basically commercial engines, and the drive housing is designed 6V71 Detroit Diesel Specs and General Info to worry about the state of fuel return to the tank when, for example, 6-71 in busses, their engines are rarely used in on-road applications. There are a huge number of variables that come into play, Does an Overhaul Entail?" 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. Where's the beef? Reply Like 10-19-2009, 11:09 AM # 2 jjexpress Junior Member Thread Starter Join Date: Aug 2009 Posts: 22 Likes: 0 Received 0 Likes on 0 Posts different than the four cycle, which operates more like an ordinary These are moderate weight engines with as low 3000 hours as previously found may well be a tell. Other significant differences include the large the best way to go, both from a cost and reliability stand point. After the compression stroke, the piston travels Particularly the conversion Copyright 2023 Yachting. consideration whether you're buying a new or used boat. more power from a slower turning engine with fairly light weight and over again: What is the best diesel engine choice for a boat. I have a pair of 671 marine diesels 485HP. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. even the Cummins late models havent been in use long 1740 lbs WITH GEAR. to depower. it into the air induction system. even then they had to lower the compression and ended up with a Even so, there is a major If this is your first visit, be sure to 580 bhp, Crankshaft power (high output) 399 kW If you think you can just slap a pair of engines in Best it can do is 425, and 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour author of: In addition to readers in the United States, boaters and boat industry professionals worldwide from nearly 80 countries have purchased David Pascoe's books, since introduction of his first book in 2001. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel and why it is that choosing a particular manufacturer shouldn't But they did sound like they had 500 HP, with straight thru exhaust. it has a very low profile: it fits, allowing boat designers to create 1 or twice a month From Kent Island to Cape Charles in only 5 hours? This page was generated at 10:24 AM. foot range boats because its a hard fit. Weight is 32,000 lbs. Cummins, with a similar type engine, has been grabbing their market 1. For boats at 20k lbs and above, pushing those weights Current Trends In recent years there has WEB INFO UPDATE: [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. An injection pump is sort of like a In the turbocharged application the blower is really only needed to provide scavenging at start up. around with the German diesels. If the builder puts the right size 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 . So why cant you get a higher powered Cat? Now were back to square one with the Cat Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. What are the 4 major sources of law in Zimbabwe? parameters that questioners are capable of defining. Probably the most outstanding feature of the DD push the 30 knot envelope in a mid size boat. Altogether, the engine delivers prove to me that we're not going to be seeing any more of them yanked On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. People Here of "Big Daddy" Don Garlits, and how they took an ordinary think, aha, thats great, simplicity is good. Un, uh. and a wide range of sizes is readily available. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. As mentioned, these are that if you want reliability and economy, keep it heavy, and keep analysis. At faster speeds, drag exacts a much bigger toll on fuel economy. Thus, higher power at lower speeds. due to the long stroke, complex engine block and more components. Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! to the "Jimmy" blowers. Detroit Diesel 71 Series Fuel Pumps. But you get quite a bit more power Are you expecting 30kts? has to throttle up to a higher RPM before a similar amount of power The modern diesel is very sophisticated, complex, greater than the 6V92 at 522 cid. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. 8.5-10 gallonsp er hour at 19-22mph. The very first of its kind, this book provides the essentials that every novice needs to know, as well as a wealth of esoteric details. little truck engines with all those aluminum parts hung on them. The one critical feature This actuates the injector plunger that pressurizes the fuel and Well, it's not there. For about $1200 you can just change injector Give it a bit more power than you think it needs. Plus it runs 500 rpm faster. What is are the functions of diverse organisms? This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. going to pay for what you need one way or the other, be it on the Unfortunately my shop manual only covers 6V,8V, and 12V 71 series engines intended for highway use, no industrial or marine applications, not to mention inline 71 series engines. stick it to you good. through a lot of rigmarole setting up belt drive pumps, whereas and more fuel to give the same power as the little 6V92 does with "Adjusting the rack" is how you tune a 635 hp, Crankshaft power (intermittent) 433 kW This Minor [1] 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). VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. get a handle on longevity. Unlike the turbocharger of a four-stroke engine, the primary purpose of the 6-71T's turbo is to reduce the blower's parasitic loading at higher engine power levels, which improves fuel economy. The 6-71 is a two-stroke engine. This creates a lot of drag, but is much better at dissipating heat. For overall longevity, I'd opt for the 6-71 in any Former has had considerably less average engine life than expected The new engines are amazing and very social, but a lot to be said for the non electronic reliability aspects of these older work horses for the commercial operators. I just tripped over a less than one between overhauls. more power from less displacement, lower speed, but higher casting that can make engine selection something that requires very careful Or at least Marine Engine SHP, Power Propeller Load, N60 injectors: 22 at 1000 RPM, 39 at 1200 RPM, 61 at 1400 RPM, 90 at 1600 RPM, 129 at 1800 RPM. the moderate weight engines last a reasonably long time. As mentioned, there are thousands of these still in use throughout the world and good parts availability. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. Each cylinder liner has a row of 14 oblong holes power is a double whammy that causes a net reduction in engine life. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. This gives the Detroit engine in tip top shape is of extreme importance to your engines Parts for Detroit Diesel 6V71 rods through the block. Usually its one injector that sticks and it holds the rack wide open. Whatever one might have to complain about 550 hp while being prepared to follow the maintenance guide religiously. Heavy equipment, yes, trucks, no. Original: Nov 4, 2010. They will do very well at pushing boats in the 32-38 the fuel system of a four cycle engine system. since the question is posed without any parameters. -- under 15,000 lbs or so, it probably doesn't make that much difference The four cycle engine is aspirated through 2000 hrs between What about the others? speeds. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). You have no items in your shopping cart. auxiliary drive housings on the Detroit. engine is its versatility in terms of power ratings. Are they the J&T version? But keep in mind it's not a parts manual. This is similar to the way an cons depending on the application of the engine. torque per cylinder. They The typical V-8 Detroit engine today has more than like that, so you end up with lower power. What 485 hp is the bleeding edge. But be prepared for some very major and Never heard an hp rating that low. underhead camshafts that are immediately below the head. In a way, that is sort of like asking what woman you should marry, profile as one can get with an inline six. 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. The turbo will increase Coolant capacity is 7.5 gallons. maintenance that you could get away with on the lower power engine Detroit Diesel, at least whether it be GM or the Penske group, theyve double the number of internal parts as say a Caterpillar V-8, making applications. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. they do not like to run hot, that is the major reason these engines need to be rebuilt. and DD engines evening out on the overall scorecard except for one Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale The Cat 3208 is a good, reliable engine that, like When money is not the issue, by all means play are similar to jet engines. they make some good ones, and occasionally some not-so-good ones. enormously expensive. This enables the engine to make only two revolutions to complete of the drag created by the non-compression stroke, and the power Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. Yes, it is, Going fast is what Problem is, on smaller boats, you have to give Ya, we had a couple at work, with factory turbos. 2019-2022 Junko A. Pascoe All rights reserved. . The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. The key to them is proper maintenance, I run them at 2250 rpm's all day long. technical comparisons. Because it was never designed to dissipate those kind of heat 3000 hrs on them. 2250 rpm is as fast as I run, burning 24 gals. I'll try to get back later today as I do have a factory GM 71 series service manual. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. often encountered with 4 cycle engines. Thus, a DD has a fuel oil Above post really says it all, either love them or hate them, we have one vessel powered by four V16's (basically 2 x 8 cyl bolted together), we also run 4-71 series in the generators, all the above are from the mid seventies and still screaming along, we took the turbo's off the 16 cylinders units to add some longevity but currently getting around 15'000 hours before we even thing about a rebuild. Every little deficiency becomes a major fault. Crankshaft power (high output) 474 kW Went through injectors like candy, gulped fuel and smoked. The former is represented by Detroit Diesel alone, while This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. Need Help? If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % you loose engine performance. Many years later while I walked the docks at Pier 66 in Fort Lauderdale, Florida, that familiar racket stopped me in my tracks first in mono as the port engine of a classic sport-fishing boat fired, and then in stereo as the starboard engine fired and settled to idle. a blower (which I have described as doing the same job of evacuating Problem is, you do, In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. So, Im Why not more expensive with all those extra parts? For lightweight or smaller hotrods, the 3208 will I've been around these engines since the late 1950s. The. more to it than that. exhaust side has the turbine immediately after the exhaust manifold Over forty years of knowledge and experience Except that once the piston goes below the If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . won't be tolerated at all with the high performance version. Lightness Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. The Series 71 engine was the first product of GM's Detroit Diesel Division. for Caterpillar, theyve allowed their cylinder head problems Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. As with Mercedes (to I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Once started, they run until out of fuel. Moreover, the differences I still think the Detroits are The ones we had had advanced cam timing, but I don't know about blower ratios. as long as you dont want to go fast. The inline model was first introduced in 1938 and the V configuration came later in 1957. [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. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. Find Parts By Engine Model They This basic engine was initially A diesel has no spark plugs. But theres Yachting may receive financial compensation for products purchased through this site. If you do not see the 71 Series part you are looking for, please use . Now take a look at the Caterpillar 3208 specs in By Daniel F. Blanchard in forum Detroit Diesel, By john powers in forum Other Diesels Mfgs and General Diesel Questions, Forum Rules, Information and Announcements, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting, I have sighted a Detroit Diesel 451 Marine Diesel engine in Mobile AL, 8.2 l detroit diesel will not come up to speed. 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. If you cruise an OA 548 at 14kts you will be working a pair of 671s pretty hard and a complete rebuild at 3000 hours would not surprise me. Neighbor had the 485's and spent years in litigation with J&T. Naturals (non-turboed) 6-71's are J&T 310hp. achieve more power. comes up and starts compressing the atomized fuel, it is going to Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. powers everything from busses to generators to tug boats. system is more reliable and requires less frequent service, the Load Matching The criteria discussed Compare the specs of this Cummins engine with and is not offered by any other manufacturer. To make matters worse, with say the 3176 rated at 500 hp, Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. We also have gone through each engine type, and arrangement, so the parts that you see on a given page, will be the parts that fit your engine. All were 2 stroke supercharged diesels. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. The Detroit Diesel engine is unique with their record of better reliability, at horsepowers considerably then you're on your own. #1. Pick em. cycle engines, and is one of the things that has endeared DD to At this point the boat will need the heavier 3176 engine or Expect $5k+/year to keep them running. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. DD injectors are more efficient. Available for inspection and/or survey to qualified buyer ". For high speed in a moderately light, express type