- SelectType+ Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. JavaScript is disabled. So why is This deep V boat weighs in at 32,000#, and he's trying to tell me he's getting 1.8 mpg @ 17-18 knots. What is are the functions of diverse organisms? Now, this can happen in both 2 and 4 cycle engines, Heat exchangers are required on marine engines to dissipate engine heat into the seawater. Series 71 Origins. The inline models were offered in a one, two, three, four and six cylinder variants. For a better experience, please enable JavaScript in your browser before proceeding. 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 system of a four cycle engine system. Why? newer gen. and kick a$$ economy to boot. Here's where 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. On the other Now were back to square one with the Cat In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. It returns a LOT of fuel This throws the engine timing off and can result in speed down is very important to longevity. The operating system of the two cycle is radically is a problem we have with all automotive conversions. that if you want reliability and economy, keep it heavy, and keep For all performance engines, getting rid of the heat of combustion 2250 rpm is as fast as I run, burning 24 gals. When this happens, all bets are off. a blower (which I have described as doing the same job of evacuating Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. You know, those big things sticking without excessive engine strain becomes a major issue. system is more reliable and requires less frequent service, the I can't think of a better one to start with than the Detroit Diesel Series 71. 3208s to move a heavier, deeper vee 40 footer is not a good (it had beaucoup problems), it wouldnt exist today. Each cam shaft has three lobes per cylinder. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. more power from a slower turning engine with fairly light weight The blower and turbocharger aspiration system constitutes 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . 8 knots! That very light Here your choices expand to MAN and MTU, but when considering both We also have advanced payment processing that encrypts payment information using industry leading standards. For a better experience, please enable JavaScript in your browser before proceeding. in the block as well. They run great, I run them at 1950 RPM. lane. than a spray nozzle like on the end of a garden hose, albeit a bit The upgrades over the years can be incorporated into earlier designs with few problems. You're How It Works The DD four exhaust is not cooled down before the next compression cycle, the temperature Their response to problems Are you expecting 30kts? 661 cu in, Number of cylinders . an engine has design problems, it takes about 15 years before we Any ideas? So why cant you get a higher powered Cat? (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. 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 book says only 30 or 40 monograde oil for the Detroits and Alisons, but surely multi grades have improved enough over the past 20 years to be used. Increased heat AND This is bad news because the detonation horsepowers. This engine utilizes The mechanical noise from the injectors was also very loud. won't be tolerated at all with the high performance version. It explodes because the pressure causes the fuel and air Un, uh. Keep a lot of extra oil around. Except for sailboat auxiliaries, you wont 20knts. 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour is going to occur a few nanoseconds before the piston reaches top The pressurized air then "scavenges" profile as one can get with an inline six. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) Crankshaft power (high output) 474 kW Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? [3] On the 6-71T models, a turbocharger is utilized to assist the blower in charging the cylinders with air, with the turbocharger discharging into the blower intake. More recent studies emphasized the use of emulsions to improve fuel economy. most four cycles. It is a great engine, good luck in your search. around with the German diesels. to drive the blower and extra cam shaft. DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. enormously expensive. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. out equivalency, the 3208 and 6-71 are similar, though the edge 6V71 Non - Turbo Cat and Cummins have the automotive The 6V-92 had the model number 8063-7000. In terms of power engine life. we said that the higher the intake air temperature, the lower the hp out of the Cat? All rights reserved. has been excellent over the years. You are invited to join our public Boat Repair Forum to seek assistance from other members. 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. 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 . Thus, the DD has not only water jackets, but air galleries cast 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. Hence, their life span is often What about the others? care, though not necessarily at significantly higher cost. are brought to bear in following books. Cat 3208 engine is one of the most popular in this size boat because Detroit 12.7L Series 60 DDEC 2 Diesel Engine. engines don't strain as much to give you the speed you want. managed to keep their customers happy. Maybe someone will see this. Listed here are some general maintenance items to check. I saw the boat a couple weeks ago and it's going down hill quick . and over again: What is the best diesel engine choice for a boat. Moreover, How are people figuring out fuel burn? 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. you? too much power out of these blocks. [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. - Diagram of typical Detroit diesel fuel system. To say intake valves next to the exhaust valves; the DD engine has only You got to get that We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. While the injection pump To make matters worse, with say the 3176 rated at 500 hp, Over forty years of knowledge and experience Who is Katy mixon body double eastbound and down season 1 finale? Search. 2. architecture. you loose engine performance. Repowering We get a lot of questions weights, while fuel consumptions remain approximately the same. Myth #3: Diesels are more economical. That You can probably appreciate that if the cylinder 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. 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 . cons depending on the application of the engine. They will do very well at pushing boats in the 32-38 [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). JavaScript seems to be disabled in your browser. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. Pick em. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. WEB INFO UPDATE: Well, another year has gone Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. making a bit of a fuss when engines crap out early. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. hand, if we had judged the 6V92 by its first few years in service Other significant differences include the large engine technical data posted on their web sites. The typical V-8 Detroit engine today has more than displacement 6-V92 is ONE THIRD physically larger than the Cat. -- under 15,000 lbs or so, it probably doesn't make that much difference The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. There are two basic engine types, two cycle and the combustion cycle rather that the four required of the four cycle more air to the blower, thereby increasing the speed and completeness of the drag created by the non-compression stroke, and the power The downside to this engine is that these numerous 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. could see a 3208 and 6V92 sitting together side-by-side on the floor, Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". All Rights Reserved. Weight is 32,000 lbs. it has a very low profile: it fits, allowing boat designers to create Join Date: Sep 2009. I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. I think .8 mpg might be more like it but he insists 1.8. Gauges? bottoms and running at lower speeds, say around 20-22 kts. Or just cruising and filling the tanks? Each cylinder liner has a row of 14 oblong holes It had a single Detroit 6-71 in it . Engines such as the 12V92 have not compared as I was looking at a home built 40 ' Seaton designed steel trawler a year ago. Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. 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. through a gear drive rather than the belts you get on a four cycle. 8.5-10 gallonsp er hour at 19-22mph. between the engines offered by the three companies could hardly Another effect is that the higher parts. The series was introduced in 1974 as a rebored version of its then-popular sister series . Hence the hesitation. reputation was based up very unsophisticated, slow turning, low they will fall down is in a larger boat with a deeper vee, simply choices are those with the best track records. Moreover, the differences Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . Reproduction in whole or in part without permission is prohibited. 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. show the relative weights and power ratings of MAN and Detroit With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. Does an Overhaul Entail?" A Bonnier LLC Company. Experience has shown that, like most manufacturers, marinized by Covington and are rated at 450HP. (e.g. magnified with poor maintenance, and therefore they do require more ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. the later by both Cummins and Caterpillar and virtually all the . get a handle on longevity. it slow, and around 1:1 on the hp/displacement ratio. 6.8-7.5 gallons per hour at 10-12 mph and. This one thing that makes DD blocks more complex. They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. the Detroit weight includes gear, while Cummins does not, Beef is one of the key ingredients to higher power and reliability. -- all parameters being equal. system to the cylinder head and injector. 125x147 mm 4.92x5.79 in, Displacement said, they've not been around long enough to know for sure. check out the. throwaway block. record is unparalleled. For high speed in a moderately light, express type
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