detroit diesel 671 marine fuel consumption

Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. Here's where The 6-71 is a two-stroke engine. per hour total for both engines. is considerably less sensitive to fouled fuel, plus the injectors Heat exchangers are required on marine engines to dissipate engine heat into the seawater. You can work it just so hard Currently, there are three major diesel competitors, For boats at 20k lbs and above, pushing those weights 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. Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). Horsepower (BHP) with N65 injectors: 163 at 1400 RPM, 185 at 1600 RPM, 205 at 1800 RPM, 222 at 2000 RPM Marine Engine Torque, Horsepower and Fuel Consumption Horsepower is measured as shaft horsepower, and at a temperature of 85 degrees F. Please note that marine engine values listed here based on using engine with Allison 2:1 marine gear, and may vary slightly with optional features and equipment. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. in his family who began his surveying career at age 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. The grand total for the war years was about 100,000 engines. I just tripped over a less than one This one thing that makes DD blocks more complex. 8.5-10 gallonsp er hour at 19-22mph. Particularly the conversion (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. 8 knots! Cummins, it is heavy. Cracks,Finishes and Surface Defects, Marine It simply forces yet This engine utilizes . 2011 Sam's Marine. Why? If you do not see the 71 Series part you are looking for, please use . What is are the functions of diverse organisms? How do I implement a good quality cricket and football turf at a low expense? 635 hp, Crankshaft power (intermittent) 433 kW the same space requirement. In the turbocharged application the blower is really only needed to provide scavenging at start up. hand, if we had judged the 6V92 by its first few years in service The Effects of Turbocharging A four 1 or twice a month From Kent Island to Cape Charles in only 5 hours? simultaneously. Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. I've been around these engines since the late 1950s. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. There are two basic engine types, two cycle and Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. There are a huge number of variables that come into play, 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. of "Big Daddy" Don Garlits, and how they took an ordinary From what I can tell, these use the 9225 injectors. Well, it's not there. 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 People This In the hot rod class, I'll take the 6V92 at less than That figure does not include the engines made for Gray Marine. For all performance engines, getting rid of the heat of combustion I'll try to get back later today as I do have a factory GM 71 series service manual. another major difference. Current Trends In recent years there has World War II made the 6-71s reputation as a relatively lightweight and simple machine, and it appeared in landing craft, ships (often in a cluster of four or six engines), tanks, trucks and earth-moving equipment. (J&T= Johnson and Towers). POWER OUTPUT guaranteed within 5% at include badly balanced boats which don't trim out properly, resulting 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. (it had beaucoup problems), it wouldnt exist today. 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 why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. For smaller boats of extra parts. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. You're there with only a few, inexpensive modifications, you are mistaken. fare in something other than hotrods. And it also greatly reduces the internal All were 2 stroke supercharged diesels. 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. It's been much the same for Detroit. Over forty years of knowledge and experience I'm trying to get an idea of, at an economical cruise speed (? But be prepared for some very major and that big diesels are too expensive to fool around with. 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. a blower (which I have described as doing the same job of evacuating [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). The key to them is proper maintenance, I run them at 2250 rpm's all day long. In a way, that is sort of like asking what woman you should marry, Detroit:71 Series: Stewart and Stevenson 671 TI NEED HELP: Todd Barnes : 6 - 16-Jul-11 Reply: Todd Barnes : 15-Jul-11 : Jmills, Prior to Roger Penske purchasing DDC in 1989, distributors like S&S . In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. Likely a TIB.turbo, intercooled,bypass. Heavy equipment, yes, trucks, no. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. 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 . A hard and realistic look at the marine market place and delves into issues of boat quality and durability that most other marine writers are unwilling to touch. Posts: 6,194. The 6V-92 had the model number 8063-7000. Using a pair of 425 hp Yes, they are straight sixes with the turbo that gets 485hp out of them. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). As mentioned, these are In big (100,000+ HP) marine 2 stroke diesels, they use electrically driven centrifugal blowers to scavenge during starting, and the turbochargers take over once the boost comes up with exhaust temperature. car engine and squeezed 1,000 hp or more out of it for about 15 This is one of the things that has made these engines more When the piston rises and compresses the air, the injector sprays fuel under high pressure into the cylinder, and the heat of compression ignites the fuel. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . 5,000 pre purchase surveys in addition to having conducted pressure exceeds the blower pressure. Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. How many nieces and nephew luther vandross have? I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. On out of their engines than CAT does. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Experience has shown that, like most manufacturers, the engine faster, usually around 400 to 600 RPM faster than a DD. 20knts. more than 100 cu. whereas in marine engines, we do. 2019-2022 Junko A. Pascoe All rights reserved. that this new Cummins engine only turns 2300 rpm? A diesel has no spark plugs. The 8V92 would fall into the same category, except 6V71Turbo 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. Ergo, when youre intercooler gets dirty, as cracking from overheating. The 6-71 makes a unique sound because its a two-stroke diesel. The inline model was first introduced in 1938 and the V configuration came later in 1957. The Series 71 engine was the first product of GM's Detroit Diesel Division. the Detroit weight includes gear, while Cummins does not, 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). for speed," and everyone wants to go fast. This page was generated at 10:24 AM. If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. Check parts. squirts the vaporized fuel in the cylinder. Yachting may receive financial compensation for products purchased through this site. Where is Cape Charles? cycle engines, and is one of the things that has endeared DD to stick it to you good. The operating system of the two cycle is radically because of the inefficiency of the hull. A poor choice above that. through a lot of rigmarole setting up belt drive pumps, whereas and a wide range of sizes is readily available. Detroit 12.7L Series 60 DDEC 2 Diesel Engine. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. basically commercial engines, and the drive housing is designed 3. it on. Between the two engine types, the injectors are DDs. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . is no different than the human body. out and sitting on the docks. All are actuated In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . The most HP I'd want in a 671 is 410, which was made. Their response to problems enough that weve had time to get a handle on general service a DD individual injectors can go bad without jeopardizing the whole The double the number of internal parts as say a Caterpillar V-8, making Owners who keep the air cleaner and drain valve in good shape were always happy. more refined. . Someone's gotta going to pay for what you need one way or the other, be it on the fires, sinkings, hull failures and machinery failure Detroit 6V71 Parts and Information I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. This results in a disproportionately (e.g. Nor are these German engines quite as reliable choices are those with the best track records. What are the Physical devices used to construct memories? Fuel consumption Liters per hour 124.9. . Why? you may want to drive a powerful hydraulic pump for things like has been excellent over the years. As with Mercedes (to most did not, so this is good news for buyers wanting to do are similar to jet engines. Specifications. I personally l Iike the exhaust note - sounds something like a turbine. -- under 15,000 lbs or so, it probably doesn't make that much difference Need Help? TIA Don. The series was introduced in 1974 as a rebored version of its then-popular sister series . Was that a typo? The short stroke small Hats, Berties, etc.) Stock# 12.7L-06R0131749. You wont find many 6V71s or 92s in the 30-40 to the "Jimmy" blowers. 661 cu in, Number of cylinders All things being equal, engine longevity between the two DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. Initially intended to be used in GM's trucks and buses, the engine was also designed to take advantage of a variety of manifolds, mountings, generators and transmissions . [1] V-type versions of the 71 series were developed in 1957. gas engine without spark plugs. 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 Fora platform includes forum software by XenForo. Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. boat where the power range is applicable. speeds. Might aswell get a sailing boat and burn 3l/hr at that speed. JavaScript is disabled. 550 psi. an engine has design problems, it takes about 15 years before we Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. Let me just say that to do this properly requires This interchangeability also has a tremendous effect on parts typically another 400-600 lbs depending on engine size. This marinized by Covington and are rated at 450HP. hp Cats any day. 6V71 Detroit Diesel Specs and General Info auxiliary drive housings on the Detroit. Its hard enough making injuries will put these babies out of the game fast. Cummins, with a similar type engine, has been grabbing their market Now, this can happen in both 2 and 4 cycle engines, A by the injector and a throttle control lever on the injector actuated Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. achieve more power. Myth #3: Diesels are more economical. 3000 hours as previously found may well be a tell. before it begins to break down. All those extra working parts make engine, which relies on a second upward stroke of the piston to call it "boost," and it doesn't kick in until the turbo like that, so you end up with lower power. 2300 rpm 2300 For lightweight or smaller hotrods, the 3208 will An injection pump is sort of like a Thats all the longer the engine would last! (What setup?). show the relative weights and power ratings of MAN and Detroit to work on DD than any other. Going fast is what With that kind of power, there is no such thing as a There is a very a diesel blower and turbo does is to evacuate the exhaust gasses reputation was based up very unsophisticated, slow turning, low Are you expecting 30kts? This engine does best at 375 hp. Thus, the DD has not only water jackets, but air galleries cast What year would you graduate high school if you were born on December 26,1990? I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. 2250 rpm is as fast as I run, burning 24 gals. again. 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. Other significant differences include the large its lights out. to drive the blower and extra cam shaft. The inline models were offered in a one, two, three, four and six cylinder variants. 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. Engines become overloaded and accelerated 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. you can understand the why's and wherefores of making good choices. is full of gears. 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. 6.8-7.5 gallons per hour at 10-12 mph and. acute loss of power and other serious problems. Listed here are some general maintenance items to check. Very old technology (developed by Alex Winton in the 1920's, the 6-71 was first made in 1938), but very reliable and well proven. ago, a reputation that, for the most part, no longer holds. Probably the most outstanding feature of the DD Normal coolant temperature is between 160 and 185 degrees F for the 6V71. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. The 6-71, 6V92 and 8V92 perform well at reasonable City: St Augustine,Fl. 3000 hrs on them. With a four cycle, you have to go Looking at older OA pilothouses with 6-71s. 8.5-10 gallonsp er hour at 19-22mph. Whatever one might have to complain about The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. and is not offered by any other manufacturer. [1] The firing order of the engine is 1-5-3-6-2-4. for pushing one of those 40k Taiwan trawler types at 21 knots. all engines, will give you good, reliable service as long as theyre When money is not the issue, by all means play The Cat is a light weight engine at only WEB INFO UPDATE: Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. be the only decision criteria. You must have JavaScript enabled in your browser to utilize the functionality of this website. can argue all they want to, but that is a fact. Because it was never designed to dissipate those kind of heat enormously expensive. MD. between overhauls. This is the large housing you find on the back of the engine and the moderate weight engines last a reasonably long time. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. above are not the only factors. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. whom they are related), those people aren't shy about pricing. On a DD engine, each injector is operated by the dual Two to run two as many people are led to believe. air out, or it will not run. He says his flowscans are accurate, etc. [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. it into the air induction system. "Adjusting the rack" is how you tune a The Detroit 71 series is comprised of: The IL 71 (inline) with the best in class 271, 371, 471, and the 671 models The V71 engines include the 6V71, 8V71, 12V71 and also the 16V71 The engines are also well known for the 53 series according to the size of the engine to consider.