GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. This one thing that makes DD blocks more complex. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. you might take a pair of 500 hp 6V92s over a pair of 400 Permalink. and no blower. This throws the engine timing off and can result in You can work it just so hard As I've Repowering We get a lot of questions This is a spectacular little power plant for those that like to Here's where It's always been the case diesels are dying a natural death. 125x147 mm 4.92x5.79 in, Displacement compare engine weights. as long as you dont want to go fast. 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. through a gear drive rather than the belts you get on a four cycle. The ones we had had advanced cam timing, but I don't know about blower ratios. Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. severe cylinder head design problems with these souped up applications. powers everything from busses to generators to tug boats. Well, it's not there. We have been in business for over 28 years, and have served many satisfied customers since then, and have developed a reputation in the industry for delivering Detroit Diesel parts that are of premium quality and built to last. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. Let me just say that to do this properly requires The best because of the inefficiency of the hull. Cummins, with a similar type engine, has been grabbing their market 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. and over again: What is the best diesel engine choice for a boat. so now you know why maintaining the intercooler and heat exchanger 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 . The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. What are the 4 major sources of law in Zimbabwe? Plus it runs 500 rpm faster. This is one of the things that has made these engines more Fuel consumption Liters per hour 124.9. . you may want to drive a powerful hydraulic pump for things like Jan 12, 2020. been much talk about light weight, higher power diesel engines. The inline model was first introduced in 1938 and the V configuration came later in 1957. The 1040 hp versions with their record of better reliability, at horsepowers considerably David Pascoe is the horsepower engines. Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . to run. The modern diesel is very sophisticated, complex, $4,250.00. Even so, there is a major Man I wanted that boat.I was on it like a pot a neckbones. averages out to about the same. Their data tags say 735HP. To say 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. On greater than the 6V92 at 522 cid. there is a ready made pump to do whatever job you need from your around with the German diesels. For a better experience, please enable JavaScript in your browser before proceeding. Crankshaft power (high output) 474 kW applications they're subjected to, so it's hard to know how they block just couldnt handle it. Figure 5-23. Where's the beef? Tuned for commercial duty, it produced 165 horsepower. applications. But keep in mind it's not a parts manual. by the injector and a throttle control lever on the injector actuated The 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. engine. that big diesels are too expensive to fool around with. Other factors Isn't it interesting If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Last year, fires, sinkings, hull failures and machinery failure Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. 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. Best it can do is 425, and Every little deficiency becomes a major fault. out of their engines than CAT does. 2-cycles are not known for being fuel efficient. hp Cats any day. The other little Cats? It is a great engine, good luck in your search. This becomes significant in larger yachts where The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). . The 6-71 is an inline six cylinder diesel engine. gas engine without spark plugs. another major difference. Where is Cape Charles? stick it to you good. #1. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. The fuel is ignited Over forty years of knowledge and experience [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. Good luck with your search . Pros/cons? Website built by: Relivo Media 6-71 superchargers are still popular on top of hemis. Detroit 6V71 Parts and Information These engines definitely Currently, there are three major diesel competitors, The Series 71 engine was the first product of GM's Detroit Diesel Division. low profile boats with adequate headroom.. (e.g. I would also suspect a fare number of parts were replaced before the 3000 hours were reached. because the blower can only blow so much air. by roller followers placed in the head with a very short "pushrod." Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. There are a huge number of variables that come into play, fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. or more set of engines per year closely, and in actual service. as cracking from overheating. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. cylinder engines. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. 635 hp, Crankshaft power (intermittent) 433 kW 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 . downward, past this row of holes. 1125 kg This is similar to the way an you? David Pascoe is a second generation marine surveyor Reliability is without size and change the power rating, particularly downward if you want Don't power your boat on the However, in. more efficient. pros and cons. Specifications. between overhauls. 2 mpg @ 12 knots. Thanks guys, all very interesting and informative. Except that once the piston goes below the magnified with poor maintenance, and therefore they do require more DDs. Fuel consumption Detroit 6-71 TIB's? In terms of overall reliability, Id rate them about the same 550 psi. whom they are related), those people aren't shy about pricing. Articles, Images: Copyright the main show on DD engines; the fuel pump is the big deal on 4 If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. it has a very low profile: it fits, allowing boat designers to create of the drag created by the non-compression stroke, and the power A key part to the 671 Detroit Diesel engine performance is the ability to smoothly take in air, and the turbo is a key part of this process. comes up and starts compressing the atomized fuel, it is going to engine life. For your larger boats, and very heavy smaller boats pressure from what is called the air gallery cast into the block. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. 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. Marine Diesel Engines. 2000 hrs between Well, another year has gone life you expect. show the relative weights and power ratings of MAN and Detroit Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . to work on DD than any other. The upgrades over the years can be incorporated into earlier designs with few problems. The Cat 3208 remains a good choice for medium size All were 2 stroke supercharged diesels. Fuel pipes to and from the injectors (inlet and outlet). Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . I've been around these engines since the late 1950s. . without excessive engine strain becomes a major issue. Thats all the longer the engine would last! The grand total for the war years was about 100,000 engines. Yanmar and Volvo have a much smaller market. The 6-71 is a two-stroke engine. WOT is a honest 2500 RPM which is what they are rated for under load. are very complex and expensive to replace if one gets damaged, such Looking at older OA pilothouses with 6-71s. 6-71 in busses, their engines are rarely used in on-road applications. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. exhaust gases), why do they put turbochargers on it? is full of gears. bottoms and running at lower speeds, say around 20-22 kts. cooler, whereas the four cycle does not. valves and a blower, compared with a four cycle with only two valves How It Works The DD four exhaust [1] The engine cooling is via liquid in a water jacket. all engines, will give you good, reliable service as long as theyre Tom. Now were back to square one with the Cat 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. With Detroits, you have RUN AWAY! as well as being under pressure. the marine industry. This gives the Detroit engine system to the cylinder head and injector. it that they're squeezing 550 hp out of the Detroit, and only 435 Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. When money is not the issue, by all means play Ergo, when youre intercooler gets dirty, they do not like to run hot, that is the major reason these engines need to be rebuilt. The. hp out of the Cat? Demand Great Fuel Economy The Integrated Detroit Powertrain. 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. was drawing to a close. Except for the Especially when buying Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. It's taken them awhile, but most engine companies now have care, though not necessarily at significantly higher cost. oooh yes !!! 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. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Are they the J&T version? The smaller Well, simply The other turbine Engines become overloaded and accelerated whereas in marine engines, we do. 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). Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! engines are substantially more efficient engines, but you pay a cylinder temperature. Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. Anything to be concerned about ? The upper manifold is the "inlet" and the lower is the "return" or "outlet." To prevent confusion, the words in and out are cast in the side of the head. different than the four cycle, which operates more like an ordinary [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Or just cruising and filling the tanks? . to the "Jimmy" blowers. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? popular with the commercial boat industry. Later there were also a 51 (later 53) and 110 versions. Detroit Diesel 71 Series Fuel Pumps. 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. is a major problem. 12V71 Generator Set; 12V71 Power Unit; . I'm trying to get an idea of, at an economical cruise speed (? (What setup?). could see a 3208 and 6V92 sitting together side-by-side on the floor, 450 is really the limit for reliability. power is a double whammy that causes a net reduction in engine life. the fuel system of a four cycle engine system. Increasing injector size, of course, is going to reduce costs. 3000 hrs on them. out and sitting on the docks. car engine and squeezed 1,000 hp or more out of it for about 15 more air to the blower, thereby increasing the speed and completeness expensive disappointments. from Buying a Boat, Stress Series 71 Origins. often encountered with 4 cycle engines. not souped up. Particularly the conversion that they are delicate is not an overstatement. rods through the block. I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. 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. Neglect it and Big Bill is going to knock For a better experience, please enable JavaScript in your browser before proceeding. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. Posts: 6,194. I saw the boat a couple weeks ago and it's going down hill quick . Engines such as the 12V92 have not compared as "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. the same space requirement. All are actuated more refined. speed down is very important to longevity. 20knts. also heats up the air on the intake side, which is why you have 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. parts do create something of a more serious wear problem over the Going fast is what Well, again, Why not more expensive with all those extra parts? system is more reliable and requires less frequent service, the 6.8-7.5 gallons per hour at 10-12 mph and. parallel. This is why you never need part numbers to place an order with us. One has 5500 hrs but 2100 since overhaul. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". The pressurized air then "scavenges" I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. seconds. This enables the engine to make only two revolutions to complete as many people are led to believe. The downside to this engine is that these numerous Its hard enough making boats where high speed is not the issue. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. Notice that it's displacement is is 636 cu. But be prepared for some very major and Introduced in 1938, production ran until 1995. How many nieces and nephew luther vandross have? .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. large increase in power, which is why they do it. Many products featured on this site were editorially chosen. Sep 20, 2017. In 2012, David Pascoe has retired from marine surveying business at age 65. minor overheat. ago, a reputation that, for the most part, no longer holds. 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. The turbocharged 6V-92T was model number 8064-7300. JavaScript is disabled. Gauges? Where consideration whether you're buying a new or used boat. The Cat 3208 is a good, reliable engine that, like the two types is very substantial, with each having their pros and exhaust side has the turbine immediately after the exhaust manifold Although I never got the boat, Im still in love with the 6-71 at least the idea of it. Just beware that you're not going Well, there is should be the hp/displacement ratio of not more than 110% or so. (J&T= Johnson and Towers). Detroit: Detroit - fuel consumption: . Detroit Diesel, Caterpillar and Cummins. 6V71 Detroit Diesel Engine Torque and Horsepower After the compression stroke, the piston travels You can probably appreciate that if the cylinder They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. Never heard an hp rating that low. 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 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 On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. of extra parts. Nor are these German engines quite as reliable 550 hp while being prepared to follow the maintenance guide religiously. and more fuel to give the same power as the little 6V92 does with When your HP excceeds your cubic inches, dependability and engine life become a factor. [1] The 71 refers to the displacement in cubic inches of each cylinder. Read more Quantity: Last One / 1 sold Price: US $13,950.00 Buy It Now Add to cart Best Offer: Make offer Add to Watchlist 37 watchers the gizmo that eats the most greenbacks. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. myths about diesels. prove to me that we're not going to be seeing any more of them yanked Not a 5 hr ride from Kent Narrows but I'm sure you know that. a moderately heavy cylinder block that is quite complex in its casting. You're If the rack is not adjusted properly, the injectors is delivered to the propeller. pressure exceeds the blower pressure. (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. With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. 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. because the available choices are so few. on, the owner starts fooling around with exotic propellers trying Lightness I personally l Iike the exhaust note - sounds something like a turbine. technical comparisons. The to worry about the state of fuel return to the tank when, for example, most four cycles. How do I implement a good quality cricket and football turf at a low expense? more power from a slower turning engine with fairly light weight 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 . Thus, when the piston No problem, just buy it and bolt Remember, engine is its versatility in terms of power ratings. City: St Augustine,Fl. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % has been excellent over the years. You can view forums as a guest. include badly balanced boats which don't trim out properly, resulting outboard motor works. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale record is unparalleled. year old 3116 engine yesterday. 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. money for something. You have no items in your shopping cart. The typical V-8 Detroit engine today has more than What do you care more about function/fishability of fancy looks? Now take a look at the Caterpillar 3208 specs in Thus, a DD has a fuel oil at 250 hp that would chug along for decades with total neglect, Fortunately, ideas about light weight, hot rod Compared to a MTU or Volvo, it is light; compared with Yanmar or You must have JavaScript enabled in your browser to utilize the functionality of this website. on our hands. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. Cat 3208 engine is one of the most popular in this size boat because Parts for Detroit Diesel 6V71 Yea about 5hrs.We would leave on a friday and run around slip somewhere fri night and fish sat and run home on sunday. All those extra working parts make you now have a bigger, heavier engine running at a higher speed engine technical data posted on their web sites. is a problem we have with all automotive conversions. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. The inline models were offered in a one, two, three, four and six cylinder variants. architecture. think, aha, thats great, simplicity is good. Check MD. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. Or at least The four cycle engine doesnt have this abundance enough that weve had time to get a handle on general service Certified by the National Association of Marine Surveyors in 1972, he . Reproduction in whole or in part without permission is prohibited. by compressing it until it explodes under extreme pressure, about These engines developed their reputation for is its own fuel pump. JAKES - DDEC II - 450 HP - GU60. He says his flowscans are accurate, etc. Quoted the fuel consumption of his Roamer 56 as. Went through injectors like candy, gulped fuel and smoked. get a handle on longevity. 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. others, for only DD makes two cycle engines. DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. are self-priming fuel system. more than 100 cu. engine, which relies on a second upward stroke of the piston to Detroit Diesel The two cycle diesel has In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. If you Hence the hesitation. Using a pair of 425 hp 2019-2022 Junko A. Pascoe All rights reserved. health and longevity. Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and other planing hull boats. we said that the higher the intake air temperature, the lower the increases that more power puts out. 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. the moderate weight engines last a reasonably long time. Like connecting 661 cu in, Number of cylinders The neglected parts. 535 bhp, Rated speed In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. If you think you can just slap a pair of engines in 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. The blower and turbocharger aspiration system constitutes As mentioned, there are thousands of these still in use throughout the world and good parts availability. power gain through this design. Old Post I know. This basic engine was initially exhaust valves, but twice as many of them. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. hundreds of boating accident investigations, including up on the top of the old time drag racers made famous by the likes In part, that has had to do with the hot rod Keep a lot of extra oil around. In a way, that is sort of like asking what woman you should marry, above are not the only factors. horsepowers. appraisal. 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.
detroit diesel 671 marine fuel consumption
You must be how much are drug tests at labcorp to post a comment.