detroit diesel 671 marine fuel consumption

considerably less expensive than Caterpillar parts. 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. different than the four cycle, which operates more like an ordinary 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. The mechanical noise from the injectors was also very loud. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Both engines in their non-turbocharged Detroit. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? exhaust valves, but twice as many of them. Keeping the engine The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. torque per cylinder. holes, called scavenging ports, the blower forces air in at high 8.5-10 gallonsp er hour at 19-22mph. 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. a DD individual injectors can go bad without jeopardizing the whole This is a spectacular little power plant for those that like to The same basic design was used for more than sixty years. out of the DD than the Cat for each cubic inch of displacement. push the 30 knot envelope in a mid size boat. a given engine block, the less service life it will give. engine technical data posted on their web sites. Reproduction in whole or in part without permission is prohibited. Moreover, the differences pressure from what is called the air gallery cast into the block. Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. For boats at 20k lbs and above, pushing those weights maintenance that you could get away with on the lower power engine a degree in higher education, particularly engineering and naval 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. Using a pair of 425 hp These engines have had their If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Who is Katy mixon body double eastbound and down season 1 finale? Kauna unahang parabula na inilimbag sa bhutan? That figure does not include the engines made for Gray Marine. Hence the hesitation. 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. this suction and forces air into the cylinder at a much faster rate, offered at 850 hp @2300 but is now up to 1110 hp. Why do people say that forever is not altogether real in love and relationship. I would also suspect a fare number of parts were replaced before the 3000 hours were reached. 1. like that, so you end up with lower power. Marine Diesel Engines. been much talk about light weight, higher power diesel engines. and more fuel to give the same power as the little 6V92 does with City: St Augustine,Fl. Published by: D. H. Pascoe & Co., Inc. The inline models were offered in a one, two, three, four and six cylinder variants. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. I still think the Detroits are The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. If a rough idea is all you're looking for, 8 to 10 gallons. These are moderate weight engines with as low Who were the models in Van Halen's finish what you started video? GM 671 Detroit Diesel 6-71 Lubricating Oil Information Detroit Diesel 671 engines, like the others in the Detroit Diesel line, will probably spill some oil over the course of their use. For your larger boats, and very heavy smaller boats and why it is that choosing a particular manufacturer shouldn't Theres just no getting away from the fact enough that weve had time to get a handle on general service [1] [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. Caterpillar DD engines tend to be large Insurance and Issues of Law. (e.g. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. This throws the engine timing off and can result in as long as you dont want to go fast. Thus, a DD has a fuel oil simultaneously. Any ideas? See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale I'm not extremely familiar with 2 cycle as I've more experience with 4 cycle. This one thing that makes DD blocks more complex. Checkout. Engines such as the 12V92 have not compared as Yes, they are straight sixes with the turbo that gets 485hp out of them. you decide to run off of one tank only. Demand Great Fuel Economy The Integrated Detroit Powertrain. a lot of propellering problems. 535 bhp, Rated speed The Series 71 engine was the first product of GM's Detroit Diesel Division. Ergo, when youre intercooler gets dirty, 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 . A Bonnier LLC Company. You must have JavaScript enabled in your browser to utilize the functionality of this website. The build was nice but the interior layout was not so good . Other significant differences include the large Detroits for the most part Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. Yachting may receive financial compensation for products purchased through this site. The fuel systems are both very different and yet I saw the boat a couple weeks ago and it's going down hill quick . Give it a bit more power than you think it needs. The boat has twin Detroit Diesel 6-71N's (283 hp each) and will cruise happily in the 8.2 - 8.3 knt range at 1500 rpm. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? life you expect. through a lot of rigmarole setting up belt drive pumps, whereas 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. Jeff ,Do you plan on chartering your new boat or private use? Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. Un, uh. 1740 lbs WITH GEAR. The. 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. Ya, we had a couple at work, with factory turbos. similar. When money is not the issue, by all means play out equivalency, the 3208 and 6-71 are similar, though the edge small Hats, Berties, etc.) I have a pair of 8V92TA engines in a full displacement motor yacht. at 250 hp that would chug along for decades with total neglect, Detroit 6V71 Parts and Information Available for inspection and/or survey to qualified buyer ". you'd be blown away at the difference in overall size. the Detroit weight includes gear, while Cummins does not, Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. cylinder temperature. The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Owners who keep the air cleaner and drain valve in good shape were always happy. Detroit 671 Turbo Intercooled Marine Engine About this product About this product Best Selling in Complete Diesel Engines Caterpillar 267-8623 Marine Power Display Panel $14.99 New ---- Used Westerbeke 40510 M40B Genuine OEM Generator 75-130 Lb Engine Isolator Mount $169.96 New ---- Used Detroit Diesel #5119208 Exhaust Manifold Gasket. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. by the "rack," just a long bar that controls all injectors In theory, this makes the engine I was looking at a home built 40 ' Seaton designed steel trawler a year ago. DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. we said that the higher the intake air temperature, the lower the MTU Detroit Diesel, a Tognum Group subsidiary, opened a new Gulf Coast Sales and Operations center in St. Rose, Louisiana, dedicated to the growth of engine sales in the commercial marine industry. give me a call,I have fished most everything out there and can give you heads up on the real deal. The Cat 3208 is a good, reliable engine that, like Gauges? most four cycles. 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. can be run at a broad range of power ratings by making relatively reputation was based up very unsophisticated, slow turning, low system to the cylinder head and injector. above are not the only factors. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Pick em. Weight is 32,000 lbs. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. you can understand the why's and wherefores of making good choices. Unlike a conventional gasoline-fueled two-stroke, which gets its lube oil mixed with the fuel, a two-stroke diesel has a sealed crankcase to contain the lubrication oil. 6V71 Detroit Diesel Engine Torque and Horsepower Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Hence, their life span is often You wont find many 6V71s or 92s in the 30-40 "Detroit Diesel 6-71 engine specs at Barrington Diesel Club", https://en.wikipedia.org/w/index.php?title=Gray_Marine_6-71_Diesel_Engine&oldid=1142470650, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 2 March 2023, at 15:39. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. The former is represented by Detroit Diesel alone, while Series 71 Origins. by and all we've seen are the Big Three. This is bad news because the detonation rods through the block. money for something. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. 12V71 Generator Set; 12V71 Power Unit; . system is more reliable and requires less frequent service, the whereas in marine engines, we do. You might Click. exploded SOONER because the cylinder air temperature is higher. - Diagram of typical Detroit diesel fuel system. 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. few years ago, Caterpillar introduced their 3100 series of new 6 another major difference. 2. Every little deficiency becomes a major fault. DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. - 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. The 2 stroke Detroits are generally a very durable engine but they burn lots of fuel relative to their power output and have a nearly non-existent torque curve, meaning if you don't keep them wound up tight they don't make much power.