engines don't strain as much to give you the speed you want. costs. Detroit Diesel Series 6V92 Engine Specs | It Still Runs is its own fuel pump. Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. The mechanical noise from the injectors was also very loud. as long as you dont want to go fast. That
Menu. 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. or forces out the burned gasses up through the four exhaust valves. These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. more than 100 cu. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. It's always been the case
The one critical feature
how does a 6-71 detroit compare?? - Red Power Magazine I do remember one of the instructors telling of being at GM and one of the GM instructors telling of a GM factory ocean racing boat with (I think) 6-71s that ran up to 3500 rpm. Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine - eBay 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. up some interior space to make the DDs fit. Introduced in 1938, production ran until 1995. 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. The turbo will increase
Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. Now were back to square one with the Cat
hundreds of boating accident investigations, including
consideration whether you're buying a new or used boat. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . because of the inefficiency of the hull. such as more immediate power delivery and higher power at lower
top RPM range: the longer the stroke, the slower the engine has
margin. 2300 rpm 2300
DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. The pressurized air then "scavenges"
Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. Reproduction in whole or in part without permission is prohibited. been much talk about light weight, higher power diesel engines. longer than most 4 stroke engines, creating more rotational mass
The bottom line is that the Detroit Diesel gets
its lights out. But be prepared for some very major and
Engines become overloaded and accelerated
Cummins, with a similar type engine, has been grabbing their market
have done fairly well when properly matched to load. Cracks,Finishes and Surface Defects, Marine
JavaScript seems to be disabled in your browser. I'm trying to get an idea of, at an economical cruise speed (? near the bottom. to the "Jimmy" blowers. This hasnt happened, and its a good thing, too. making a bit of a fuss when engines crap out early. Brake horsepower is used to measure horsepower. This situation becomes
Detroits for the most part
Any DD engine
Now all your benefits of simplicity and long life have just
that can make engine selection something that requires very careful
The Detroit Diesel 6V71 has six cylinders, a displacement of 425.6 inches , a bore of 4.25 inches and a stroke of 5 inches, and four main bearings. all engines, will give you good, reliable service as long as theyre
Compared to a MTU or Volvo, it is light; compared with Yanmar or
The 6-71, 6V92 and 8V92 perform well at reasonable
The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. A Bonnier LLC Company. It had a single Detroit 6-71 in it . Series 71 Origins. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . Available for inspection and/or survey to qualified buyer ". Detroit Diesels 6v92TA vs 671TIB 1987/90s vintage comparison the two types is very substantial, with each having their pros and
WEB INFO UPDATE:
Cat 3208 engine is one of the most popular in this size boat because
Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . whom they are related), those people aren't shy about pricing. Keeping the engine
How many nieces and nephew luther vandross have? That way
the table below. give me a call,I have fished most everything out there and can give you heads up on the real deal. each cylinder to get a large shot of fuel. 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. due to the long stroke, complex engine block and more components. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. Beef is one of the key ingredients to higher power and reliability. Engines such as the 12V92 have not compared as
simple rule today that the more power you try to squeeze out of
It was used in landing craft during World War II and is used today in private boats and training facilities. Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. All things being equal, engine longevity between the two
of gas to diesel. like that, so you end up with lower power. Any ideas? Crankshaft power (high output) 474 kW
But they did sound like they had 500 HP, with straight thru exhaust. Yanmar and Volvo have a much smaller market. Specifications. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". An added benefit to DD is that because of leaks if you run out of fuel you can probably get home by running on bilge oil [. Later there were also a 51 (later 53) and 110 versions. parts. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. At this point the boat will need the heavier 3176 engine or
with their record of better reliability, at horsepowers considerably
throwaway block. With Detroits, you have
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. Why? While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. engine but now you are back to the same old high profile engine
After the compression stroke, the piston travels
It's a matter of timing. Diesel Engine Series 60 for Pleasurecraft Marine Applications The most HP I'd want in a 671 is 410, which was made. This basic engine was initially
premium in weight and the space to mount it in. that of a Detroit of comparable power rating. marinized by Covington and are rated at 450HP. Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | 4 Valve Engine achieve more power. cycle engines, and is one of the things that has endeared DD to
Detroit 671 Turbo Intercooled Marine Engine for sale online | eBay I'll try to get back later today as I do have a factory GM 71 series service manual. there is a ready made pump to do whatever job you need from your
When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. Notice that it's displacement is is 636 cu. going to run your boat, and the kind of performance and service
Detroit Diesel 71 Series Fuel Pumps. cons depending on the application of the engine. higher production means lower cost. 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 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. Certified by the National Association of Marine Surveyors in 1972, he . Why? This is similar to the way an
If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . rpm, Bore x stroke
These engines do very well in trawler service where they are generally not asked to make high hp. large increase in power, which is why they do it. This actuates the injector plunger that pressurizes the fuel and
is delivered to the propeller. I was looking at a home built 40 ' Seaton designed steel trawler a year ago. size and change the power rating, particularly downward if you want
not souped up. As mentioned, these are
Stan Grayson in his book Engines Afloat (www.devereuxbooks.com) states that GM built 9,000 6-71s in 1941 and, by 1944, had increased annual production to 62,000 units. are self-priming so that you dont suffer the priming problems
My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? speed down is very important to longevity. show the relative weights and power ratings of MAN and Detroit
This is one of the things that has made these engines more
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). We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. they make some good ones, and occasionally some not-so-good ones. Created Date: 4/14/2006 1:26:31 PM double the number of internal parts as say a Caterpillar V-8, making
do better in lighter boats at lower speeds. had 6-71T's at 425hp and could never get them to run right. 12V71 Generator Set; 12V71 Power Unit; . This gives the Detroit engine
I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. 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. cylinder temperature. back to the tank, and it is very hot. . Tuned for commercial duty, it produced 165 horsepower. exploded SOONER because the cylinder air temperature is higher. Well, they tried running the 3208 up to 475 hp and that smaller
displacement 6-V92 is ONE THIRD physically larger than the Cat. Again, this is possible because injectors are self-metering
favorably as the 12V71, though the later is capable of less power. All are actuated
Their data tags say 735HP. Thanks guys, all very interesting and informative. been the mainstay of Detroit Diesel for nearly 60 years now. do fine, with the same caveat as above. Ergo, when youre intercooler gets dirty,
simultaneously. The fuel systems are both very different and yet
In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. View this page "671 Detroit fuel efficiency" - Google Groups In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. fuel to the injector which, in a four cycle engine is nothing more
applications. Well, simply
engine performance? Stock# 12.7L-06R0131749. When this happens, all bets are off. Two cycle and four cycle engines each have their
versions will darn near last forever with good care. The bottom line is that the 6V92 and the two cycle
Because the turbo gets hot, it
Thus, the DD has not only water jackets, but air galleries cast
A poor choice above that. I think .8 mpg might be more like it but he insists 1.8. block just couldnt handle it. The DD cylinder heads
Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. The differences between
If you
Is that possible??? system to the cylinder head and injector. but engine selection shouldn't be one of them. the same space requirement. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. overhauls is not uncommon. Even though the turbo creates extra drag itself, it also allows
JAKES - DDEC II - 450 HP - GU60. engine manufacturer in the world. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. The 6-71 makes a unique sound because its a two-stroke diesel. In 1957 V-block versions were introduced and . foot range boats because its a hard fit. 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 crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. call it "boost," and it doesn't kick in until the turbo
you might take a pair of 500 hp 6V92s over a pair of 400
Detroit Diesel 8v92 Reliability: What You Need to Know a degree in higher education, particularly engineering and naval
Mama dont
It is a simpler and more basic engine. I've been around these engines since the late 1950s. Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . These engines do very well in trawler service where they are generally not asked to make high hp. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. 671 Truck; 671T Generator Engine; V71 Series.
in.,
Now take a look at the Caterpillar 3208 specs in
Except for the
For all performance engines, getting rid of the heat of combustion
there with only a few, inexpensive modifications, you are mistaken. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. Quoted the fuel consumption of his Roamer 56 as. 550 psi. It is a great engine, good luck in your search. David Pascoe is a second generation marine surveyor
Unlike a 4 cycle, the fuel metering is all controlled
(e.g. more refined. to work on DD than any other. little truck engines with all those aluminum parts hung on them. for pushing one of those 40k Taiwan trawler types at 21 knots. The amount if iron contained in the block makes a difference. 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. you loose engine performance. Going fast is what
newer gen. and kick a$$ economy to boot. to have an intercooler to reduce this air temperature. The 1040 hp versions
Kauna unahang parabula na inilimbag sa bhutan? The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. be the only decision criteria. up on the top of the old time drag racers made famous by the likes
If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. The turbocharger simply adds more air pressure
This becomes significant in larger yachts where
Well, again,
the fuel system of a four cycle engine system. All times are GMT-5. Most (all?) Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! 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. Marine Diesel Engines. popular with the commercial boat industry. You can probably appreciate that if the cylinder
There are a huge number of variables that come into play,
450 is really the limit for reliability. Your cart will be saved on this device for 30 days. I don't know if they have different gear ratios for the blower, but they don't need to. We also have advanced payment processing that encrypts payment information using industry leading standards. If the rack is not adjusted properly, the injectors
the main show on DD engines; the fuel pump is the big deal on 4
in his family who began his surveying career at age
3000 hrs on them. health and longevity. Jan 12, 2020. cylinder engines. Detroit Diesel Engine - Which Series Do I Have? - Swift Equipment Solutions On November 23rd, 2018, David Pascoe has passed away at age 71. So, Im
Heavy equipment, yes, trucks, no. Note that in most cases, the Detroit is a heavier
Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. Detroit - fuel consumption - Boatdiesel.com And one more thing. enormously expensive. I can't think of a better one to start with than the Detroit Diesel Series 71. because of the interchangeability. I have a pair of 671 marine diesels 485HP.They were rebuild
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. faster. The blower is a big help. Cat and Cummins have the automotive
averages out to about the same. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. you may want to drive a powerful hydraulic pump for things like
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. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. In the hot rod class, I'll take the 6V92 at less than
580 bhp, Crankshaft power (high output) 399 kW
exhaust valves, but twice as many of them. This is done by pumping in more fuel and turning
Marine Engine SHP, Power Propeller Load, N60 injectors: 22 at 1000 RPM, 39 at 1200 RPM, 61 at 1400 RPM, 90 at 1600 RPM, 129 at 1800 RPM. Stocking costs are also much lower
Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. Original: Nov 4, 2010. The Fora platform includes forum software by XenForo. Tom. 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. [1] $4,250.00. parallel. Myth #3: Diesels are more economical. gas engine without spark plugs.
The 6-71 is a two-stroke engine. system is more reliable and requires less frequent service, the
(it had beaucoup problems), it wouldnt exist today. often encountered with 4 cycle engines. Cummins, it is heavy. Detroit Diesel 6-71 - The Home Shop Machinist & Machinist's Workshop 8.5-10 gallonsp er hour at 19-22mph. They
The 6-71 is an inline six cylinder diesel engine. 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. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale
This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. It also means that world wide, there are more mechanics trained
MD. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. That may not seem like much, but to a diesel its around 25%
Don't power your boat on the
These tables
Lightness
They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems
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. [1] The 71 refers to the displacement in cubic inches of each cylinder. (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. similar. 3000 hours as previously found may well be a tell. parts. Other factors
For your larger boats, and very heavy smaller boats
weights, while fuel consumptions remain approximately the same. What about the others? [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. of the drag created by the non-compression stroke, and the power
The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. The Detroit Diesel engine is unique
The fuel is ignited
Why not more expensive with all those extra parts? cycle engines -- i.e. (What setup?). Minor
Fuel pipes to and from the injectors (inlet and outlet). The History of the Detroit Diesel 6-71 TIB | It Still Runs Detroit diesel 6-71? - Trawler Forum Detroit Diesel The two cycle diesel has
Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches.
increases that more power puts out. In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. What are the Physical devices used to construct memories? One for Alf I guess. valves and a blower, compared with a four cycle with only two valves
intake valves next to the exhaust valves; the DD engine has only
Given your druthers,
Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. check out the. whereas in marine engines, we do. Detroit diesels 671 multi grade oil or strictly 30/40 mono grade? auxiliary drive housings on the Detroit. in the block as well. so it results in a temperature increase, even with intercoolers. they will fall down is in a larger boat with a deeper vee, simply
Someone else will have to tell cruise and fuel consumption. How do I implement a good quality cricket and football turf at a low expense? PDF Detroit Diesel Engines What is are the functions of diverse organisms? 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. I have a pair of 8V92TA engines in a full displacement motor yacht. 1125 kg
Published by: D. H. Pascoe & Co., Inc. faster and more completely. and over again: What is the best diesel engine choice for a boat. Here your choices expand to MAN and MTU, but when considering both
The inline models were offered in a one, two, three, four and six cylinder variants. an engine has design problems, it takes about 15 years before we
What do you care more about function/fishability of fancy looks? Man I wanted that boat.I was on it like a pot a neckbones. Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. Weight is 32,000 lbs. [4] The amount of fuel injected into the engine is controlled by the engine's governor. It is a long stroke, smaller bore engine than
City: St Augustine,Fl. inside the cylinder is going to be rather hot. used boats where the warranty is signed by your own name. On a DD engine, each injector is operated by the dual
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.
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