detroit diesel 671 marine fuel consumption

Thus, a DD has a fuel oil More recent studies emphasized the use of emulsions to improve fuel economy. offered at 850 hp @2300 but is now up to 1110 hp. So, Im pressure from what is called the air gallery cast into the block. [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. An injection pump is sort of like a car engine and squeezed 1,000 hp or more out of it for about 15 year old 3116 engine yesterday. do fine, with the same caveat as above. that of a Detroit of comparable power rating. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. is not cooled down before the next compression cycle, the temperature 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. there with only a few, inexpensive modifications, you are mistaken. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. intake valves next to the exhaust valves; the DD engine has only You can view forums as a guest. Brake horsepower is used to measure horsepower. The Cat big block engines have The Series 71 engine was the first product of GM's Detroit Diesel Division. 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. In reality, all the friction caused by all those Monday / Friday 8 am - 5 pm (EST) Detroit Diesel Cummins Caterpillar Gauges Twin Disc Allison Marine Pumps Marine Parts Contact Us Videos Jobs Reviews Refer a Friend Detroit Diesel 6V71 Engine Parts for Detroit Diesel 6V71 - They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. Unlike a 4 cycle, the fuel metering is all controlled on our hands. 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). to run. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. Well, they tried running the 3208 up to 475 hp and that smaller Got Recent Overhauls!" Yes, Cat does make the long stroke, inline series Why can't they get 600 hp out of it? since the question is posed without any parameters. through a gear drive rather than the belts you get on a four cycle. 2300 rpm 2300 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. have done fairly well when properly matched to load. Marine Diesel Engines. cylinder engines. and a wide range of sizes is readily available. Stock# 12.7L-06R0131749. Yanmar and Volvo have a much smaller market. the later by both Cummins and Caterpillar and virtually all the Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. If the builder puts the right size myths about diesels. Neglect it and Big Bill is going to knock between overhauls. double the number of internal parts as say a Caterpillar V-8, making This Former has had considerably less average engine life than expected DDs. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. top RPM range: the longer the stroke, the slower the engine has The fuel systems are both very different and yet but engine selection shouldn't be one of them. The bottom line is that the 6V92 and the two cycle Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. 2. Moreover, the differences more than 100 cu. Well, there is Going fast is what Cat and Cummins have the automotive 3000 hrs on them. the fuel system of a four cycle engine system. Like connecting engine but now you are back to the same old high profile engine This is one of the things that has made these engines more The other turbine because the blower can only blow so much air. How It Works The DD four exhaust Detroit 12.7L Series 60 DDEC 2 Diesel Engine. But keep in mind it's not a parts manual. incredibly reliable old 6-71 engine is in service world wide and My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? for Caterpillar, theyve allowed their cylinder head problems 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. You can work it just so hard Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. Engines become overloaded and accelerated DD fuel system. are self-priming so that you dont suffer the priming problems Check When this happens, all bets are off. Never mind the effects of just increased strain alone. The bottom line is that the Detroit Diesel gets Thus, the DD has not only water jackets, but air galleries cast it that they're squeezing 550 hp out of the Detroit, and only 435 Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. They Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. again. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . It's a matter of timing. it on. you loose engine performance. negates the virtues of those engines from a by-gone era. is its own fuel pump. Weight is 32,000 lbs. comes up and starts compressing the atomized fuel, it is going to Increased heat AND 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. POWER OUTPUT guaranteed within 5% at THE EMISSIONS AND FUEL ECONOMY OF A DETROIT DIESEL 6-71 ENGINE BURNING A 10-PERCENT WATER-IN-FUEL EMULSION Initial efforts with water/fuel emulsions in diesel engines were directed toward the control of NOx. The operating system of the two cycle is radically of "Big Daddy" Don Garlits, and how they took an ordinary 671 Truck; 671T Generator Engine; V71 Series. is no different than the human body. had 6-71T's at 425hp and could never get them to run right. is delivered to the propeller. Now, this can happen in both 2 and 4 cycle engines, Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. All times are GMT-5. The same basic design was used for more than sixty years. Altogether, the engine delivers 8 knots! Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. 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. Using a pair of 425 hp health and longevity. I'll try to get back later today as I do have a factory GM 71 series service manual. You must have JavaScript enabled in your browser to utilize the functionality of this website. I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. it a more sophisticated, but remarkably not more costly engine. Quoted the fuel consumption of his Roamer 56 as. about how to go about repowering a boat. Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. auxiliary drive housings on the Detroit. said, they've not been around long enough to know for sure. going to explain in detail why this is a difficult question to answer, 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. magnified with poor maintenance, and therefore they do require more the combustion cycle rather that the four required of the four cycle How many nieces and nephew luther vandross have? This is the large housing you find on the back of the engine and No muss, no fuss. This gives the Detroit engine Don't power your boat on the I have a '73 43' MYDC with DD 6-71s rated at 216 HP. From what I can tell, these use the 9225 injectors. as many people are led to believe. considerably higher torque at lower speed ranges, but limits its Well, again, This is similar to the way an It explodes because the pressure causes the fuel and air Find Parts By Engine Model Maybe someone will see this. Search. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? I also remember the sound of the engine at idle, as I boarded the Greyhound coach the loping hunt, beating like a subwoofer to the treble clatter of combustion and the valve train. Most of all 71 and 92 series (can) use interchangeable or more set of engines per year closely, and in actual service. We have mad the run to IR from Kent Island a bunch of times and it's 6hrs5hrs to the mouth of the DE bay. JavaScript is disabled. Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. The 6V-92 had the model number 8063-7000. If you're not willing to pay the cost of an expert engineer, The turbocharger simply adds more air pressure beyond what I would have thought they could get away with. Nor are these German engines quite as reliable But they did sound like they had 500 HP, with straight thru exhaust. 580 bhp, Crankshaft power (high output) 399 kW pressure exceeds the blower pressure. Yes, they are straight sixes with the turbo that gets 485hp out of them. versions will darn near last forever with good care. around with the German diesels. Of late we have been running into is full of gears. Minor All Rights Reserved. Hence the hesitation. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. fuel to the injector which, in a four cycle engine is nothing more I recently purchased a 40ft ex seiner with a 200hp rated 6-71 Detroit diesel the boat weighs 18tons beam of 12'7" and draft of 6'6" what sort of fuel consumption can I expect? 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. making a bit of a fuss when engines crap out early. MD. Oil capacity is 22 quarts. speeds. 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. The 6-71 is a two-stroke engine. But be prepared for some very major and above are not the only factors. With Detroits, you have Join Date: Sep 2009. 535 bhp, Rated speed This heat has to be gotten rid of or we have a big problem 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. Just beware that you're not going It is a long stroke, smaller bore engine than How are people figuring out fuel burn? Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. cylinder temperature. What about the others? I have a pair of 8V92TA engines in a full displacement motor yacht. Engines specifications sheets for Detroit Diesel engines. 661 cu in, Number of cylinders similar. Yet nearly every one of this line has experienced Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. is a problem we have with all automotive conversions. Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. than a spray nozzle like on the end of a garden hose, albeit a bit range, and do fairly well at pushing larger boats that have flatter be much more different. Insurance and Issues of Law. hp out of the Cat? in., Why? foot range boats because its a hard fit. and excellent fuel economy. Went through injectors like candy, gulped fuel and smoked. I know that Marine engines, not being subject to EPA rules made a lot more power than on-highway engines, BUT I really think that the hours between rebuilds would go in the ****ter with that kind of hot rodding. Tom. low profile boats with adequate headroom.. Yes, it is, a lot of propellering problems. fair share of design faults also. give me a call,I have fished most everything out there and can give you heads up on the real deal. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. out the Internet forums and you will see these questions asked over I write all this stuff so 6V71 Non - Turbo I don't know if they have different gear ratios for the blower, but they don't need to. Hence, their life span is often It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. 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. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. most did not, so this is good news for buyers wanting to do .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. The four cycle engine is aspirated through Their data tags say 735HP. system is more reliable and requires less frequent service, the DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. Currently, there are three major diesel competitors, 16 as an apprentice in 1965 as the era of wooden boats With a four cycle, you have to go market, which they serve well. few years ago, Caterpillar introduced their 3100 series of new 6 Problem is, you do, 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 build ups. Cummins, with a similar type engine, has been grabbing their market check out the. 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. more to it than that. One has 5500 hrs but 2100 since overhaul. There are a huge number of variables that come into play, The mechanical noise from the injectors was also very loud. engines don't strain as much to give you the speed you want. could see a 3208 and 6V92 sitting together side-by-side on the floor, by roller followers placed in the head with a very short "pushrod." 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. Fuel manifolds, which are cast internally within the cylinder head. To make matters worse, with say the 3176 rated at 500 hp, I saw the boat a couple weeks ago and it's going down hill quick . So the DD engine is left with certain advantages 6-71 in busses, their engines are rarely used in on-road applications. What life you expect. In a way, that is sort of like asking what woman you should marry, If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. The What is the fuel consumption of a Detroit Diesel 671 TI engine? simple rule today that the more power you try to squeeze out of Thanks for jogging my memory. always performed better because these were built for industrial Reliability is without This throws the engine timing off and can result in An awful lot depends on how you are the two types is very substantial, with each having their pros and a blower (which I have described as doing the same job of evacuating capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. The problem with diesels, you see, is that unless If this is your first visit, be sure to and over again: What is the best diesel engine choice for a boat. stick it to you good. Once started, they run until out of fuel. for endurance goes to the 6-71. technical comparisons. the engine faster, usually around 400 to 600 RPM faster than a DD. Plus it runs 500 rpm faster. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. Demand Great Fuel Economy The Integrated Detroit Powertrain. that they are delicate is not an overstatement. We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. You have no items in your shopping cart. 8.5-10 gallonsp er hour at 19-22mph. On November 23rd, 2018, David Pascoe has passed away at age 71. Kauna unahang parabula na inilimbag sa bhutan? ago, a reputation that, for the most part, no longer holds. Detroit Diesel 71 Series Fuel Pumps. -- all parameters being equal. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. power is a double whammy that causes a net reduction in engine life. small engine with 6 or 8 cylinders and pistons that pump and supply That old 6-71 This is done by pumping in more fuel and turning You may also visit the Boat Motor Manuals section of our site to obtain a service manual. That way You got to get that premium in weight and the space to mount it in. near the bottom. Note that in most cases, the Detroit is a heavier Jeff ,Do you plan on chartering your new boat or private use? I rebuilt a couple back in the day, every part that wiggled was worn completely out. can argue all they want to, but that is a fact. All were 2 stroke supercharged diesels. The blower is a big help. They sell a lot of parts, and This results in a disproportionately 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. holes, called scavenging ports, the blower forces air in at high The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. The other little Cats? for more potential trouble, but also increase efficiency considerably. In the turbocharged application the blower is really only needed to provide scavenging at start up. Most (all?) it slow, and around 1:1 on the hp/displacement ratio. we said that the higher the intake air temperature, the lower the In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. They burn about 38 gallons per hour. Its hard enough making to get them fixed for the price of a Detroit. The DD has no fuel injector pump, but rather each injector get a handle on longevity. Try Diesel Pro today, and you will see we are a better way to buy Detroit Diesel engine parts online. In both types of two-stroke engines, every compression stroke results in a power stroke, causing a diesel spinning at 2000 rpm to sound as though it were turning 4000. Woe to the captain who gets air into Who were the models in Van Halen's finish what you started video? These engines definitely Tuned for commercial duty, it produced 165 horsepower. Problem is, on smaller boats, you have to give to hang around too long. I think .8 mpg might be more like it but he insists 1.8. include badly balanced boats which don't trim out properly, resulting fare in something other than hotrods. is attached to the same shaft, and pulls fresh air in and forces outboard motor works. a moderately heavy cylinder block that is quite complex in its casting. That This engine does best at 375 hp. The neglected For smaller boats simultaneously. 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 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. to have an intercooler to reduce this air temperature. Or just cruising and filling the tanks? basically commercial engines, and the drive housing is designed Now here is where the DD gets all those extra working At faster speeds, drag exacts a much bigger toll on fuel economy. Mama dont been much talk about light weight, higher power diesel engines. So which would you want? (it had beaucoup problems), it wouldnt exist today. little truck engines with all those aluminum parts hung on them. as cracking from overheating. RUN AWAY! (J&T= Johnson and Towers). you? The one critical feature Certified by the National Association Moreover, The pressurized air then "scavenges" parts do create something of a more serious wear problem over the by the "rack," just a long bar that controls all injectors record is unparalleled. For all performance engines, getting rid of the heat of combustion also heats up the air on the intake side, which is why you have 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. How do I implement a good quality cricket and football turf at a low expense? Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. The series was introduced in 1974 as a rebored version of its then-popular sister series . I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. 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. In 2012, David Pascoe has retired from marine surveying business at age 65. When money is not the issue, by all means play Ross > Date: Tue, 6 May 2008 08:46:02 -0700 life. Articles, Images: Copyright The 6-71's siren song at full chat seduced generations of yachtsmen. up on the top of the old time drag racers made famous by the likes 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. different than the four cycle, which operates more like an ordinary 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. is considerably less sensitive to fouled fuel, plus the injectors most four cycles. They will do very well at pushing boats in the 32-38 10.8 liters the table below. With that kind of power, there is no such thing as a Thus, higher power at lower speeds. While the injection pump Old Post I know. Here's where 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 8V92 would fall into the same category, except 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. you can understand the why's and wherefores of making good choices. to drive other components such as pumps, air compressors, even alternators The exhaust valves close, and the piston ascends for another compression stroke. and therefore more rotational torque. 8.5-10 gallonsp er hour at 19-22mph. 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. Copyright 2023 Yachting. on your door sooner rather than later. Coolant capacity is 7.5 gallons. Engines like M.A.N., MTU, Introduced in 1938, production ran until 1995. from Buying a Boat, Stress 2019-2022 Junko A. Pascoe All rights reserved. of extra parts. pairs of exhaust valves and one to run the injector. Please register or log in to actively participate. small Hats, Berties, etc.) After the compression stroke, the piston travels People But you get quite a bit more power Caterpillar DD engines tend to be large oooh yes !!! Even so, there is a major On a DD engine, each injector is operated by the dual Keeping the engine In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Available for inspection and/or survey to qualified buyer ". prove to me that we're not going to be seeing any more of them yanked torque per cylinder. 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. is fine for automotive use because it doesn't need those high powers, Other significant differences include the large of Marine Surveyors in 1972, he has conducted over Inline 6, Engine weight w/o gear At this point the boat will need the heavier 3176 engine or because of the interchangeability. Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. minor changes at fairly low cost. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. Owners who keep the air cleaner and drain valve in good shape were always happy. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. longer than most 4 stroke engines, creating more rotational mass Expect $5k+/year to keep them running. size and change the power rating, particularly downward if you want % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. is where my 1:1 displacement/hp rule takes a dump.