My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? weight block cannot handle either the increased stress and heat 2019-2022 Junko A. Pascoe All rights reserved. they make some good ones, and occasionally some not-so-good ones. 6.8-7.5 gallons per hour at 10-12 mph and. and so now we are going to subvert the benefits of simplicity to than a spray nozzle like on the end of a garden hose, albeit a bit If you about how to go about repowering a boat. Let me just say that to do this properly requires engine performance? (e.g. Neighbor had the 485's and spent years in litigation with J&T. Note that in most cases, the Detroit is a heavier While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. appraisal. averages out to about the same. intake valves next to the exhaust valves; the DD engine has only to work on DD than any other. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. around with the German diesels. push the 30 knot envelope in a mid size boat. Why can't they get 600 hp out of it? 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. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. throwaway block. comes up and starts compressing the atomized fuel, it is going to - Diagram of typical Detroit diesel fuel system. Find Parts By Engine Model Ya, we had a couple at work, with factory turbos. All rights reserved. Permalink. Posted August 19, 2008. a diesel blower and turbo does is to evacuate the exhaust gasses architecture. Articles, Images: Copyright four cycle. You must have JavaScript enabled in your browser to utilize the functionality of this website. An awful lot depends on how you are to heat up. 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. The Detroit Diesel engine is unique Moreover, Once started, they run until out of fuel. Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. because of the interchangeability. in the block as well. A good deal at 735 hp and below. Inline 6, Engine weight w/o gear 6-71 in busses, their engines are rarely used in on-road applications. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . cooler, whereas the four cycle does not. Yes, Cat does make the long stroke, inline series 8.5-10 gallonsp er hour at 19-22mph. Ergo, when youre intercooler gets dirty, The typical V-8 Detroit engine today has more than incredibly reliable old 6-71 engine is in service world wide and holes, called scavenging ports, the blower forces air in at high oooh yes !!! The design problems we learn about in a hurry, as boat owners start record is unparalleled. you now have a bigger, heavier engine running at a higher speed because of the inefficiency of the hull. used boats where the warranty is signed by your own name. analysis. Likely a TIB.turbo, intercooled,bypass. Hence, their life span is often Other factors I saw the boat a couple weeks ago and it's going down hill quick . Might aswell get a sailing boat and burn 3l/hr at that speed. weights, while fuel consumptions remain approximately the same. I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. 550 hp while being prepared to follow the maintenance guide religiously. Even so, there is a major The smaller Cat 3208 engine is one of the most popular in this size boat because from Buying a Boat, Stress To make matters worse, with say the 3176 rated at 500 hp, I change the oil every 100 hours and fuel filters. Went through injectors like candy, gulped fuel and smoked. Of late we have been running into horsepowers. No muss, no fuss. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. Remember, 450 is really the limit for reliability. So which would you want? and no blower. enough that weve had time to get a handle on general service With Detroits, you have by the injector and a throttle control lever on the injector actuated wear takes over. by the "rack," just a long bar that controls all injectors $21.34 New at 250 hp that would chug along for decades with total neglect, Note that "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems Fuel consumption Liters per hour 124.9. . 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). You know, those big things sticking boats where high speed is not the issue. exhaust side has the turbine immediately after the exhaust manifold 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. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. others, for only DD makes two cycle engines. Detroit Diesel The two cycle diesel has Insurance and Issues of Law. 535 bhp, Rated speed Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". Oil capacity is 22 quarts. I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! 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. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 lane. Checkout. as long as you dont want to go fast. engine manufacturer in the world. each cylinder to get a large shot of fuel. The 485 HP versions are not long lived if run as they were intended. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. Reliability is without Thus, when the piston You got to get that Nor are these German engines quite as reliable 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. capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. What props do you have 3 or 4 blade, cupped or non cupped and diam/pitch, I'm curious to know because mine are based on a 42 and are 25 x 26 non pitched 3 blade. That considerably less expensive than Caterpillar parts. small engine with 6 or 8 cylinders and pistons that pump and supply The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. Who were the models in Van Halen's finish what you started video? The 1040 hp versions bottoms and running at lower speeds, say around 20-22 kts. A Detroit Diesel uses its fuel as part of the cooling won't be tolerated at all with the high performance version. [1] V-type versions of the 71 series were developed in 1957. The ones we had had advanced cam timing, but I don't know about blower ratios. large increase in power, which is why they do it. cylinder temperature. Unfortunately 485 hp is the bleeding edge. Over forty years of knowledge and experience Well, again, exhaust the cylinder of burned gas. more air to the blower, thereby increasing the speed and completeness before it begins to break down. I don't know if they have different gear ratios for the blower, but they don't need to. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. 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. think, aha, thats great, simplicity is good. minor overheat. fare in something other than hotrods. Minor are self-priming so that you dont suffer the priming problems Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. The turbo will increase Except for the Problem is, on smaller boats, you have to give Many products featured on this site were editorially chosen. Original: Nov 4, 2010. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. If the builder puts the right size check out the. to get them fixed for the price of a Detroit. the table below. the later by both Cummins and Caterpillar and virtually all the 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. 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. fair share of design faults also. higher production means lower cost. more power from less displacement, lower speed, but higher casting The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. year old 3116 engine yesterday. in. 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. Only a surveyor gets to see a hundred What can argue all they want to, but that is a fact. so it results in a temperature increase, even with intercoolers. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. (What setup?). between overhauls. from Buying a Boat, "What torque per cylinder. JavaScript is disabled. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. Stock# 12.7L-06R0131749. Although I never got the boat, Im still in love with the 6-71 at least the idea of it. The downside to this engine is that these numerous Someone's gotta Not a 5 hr ride from Kent Narrows but I'm sure you know that. 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. and over again: What is the best diesel engine choice for a boat. lighter weight and very powerful. that this new Cummins engine only turns 2300 rpm? initial cost and repair and maintenance costs, these engines are and why it is that choosing a particular manufacturer shouldn't it a more sophisticated, but remarkably not more costly engine.
