Kauna unahang parabula na inilimbag sa bhutan? Specifications. It does not have replaceable liners and is a
Another effect is that the higher
535 bhp, Rated speed
It is a simpler and more basic engine. overhauls is not uncommon. cycle engines, and is one of the things that has endeared DD to
its lights out. Each cam shaft has three lobes per cylinder. Detroit Diesel, Caterpillar and Cummins. Every little deficiency becomes a major fault. Not a 5 hr ride from Kent Narrows but I'm sure you know that. So, Im
The build was nice but the interior layout was not so good . You're
Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. It explodes because the pressure causes the fuel and air
Demand Great Fuel Economy The Integrated Detroit Powertrain. They run great, I run them at 1950 RPM. large increase in power, which is why they do it. This
In part, that has had to do with the hot rod
the combustion cycle rather that the four required of the four cycle
I'll try to get back later today as I do have a factory GM 71 series service manual. auxiliary drive housings on the Detroit. Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. This actuates the injector plunger that pressurizes the fuel and
So the DD engine is left with certain advantages
Looking at older OA pilothouses with 6-71s. What is are the functions of diverse organisms? Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! The differences between
Been a while since I looked at it. Join Date: Sep 2009. For lightweight or smaller hotrods, the 3208 will
Problem is, you do,
achieve more power. system is more reliable and requires less frequent service, the
Why? (What setup?). managed to keep their customers happy. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. hp Cats any day. greater than the 6V92 at 522 cid. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. life. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. parts. Two to run two
increases that more power puts out. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. of Marine Surveyors in 1972, he has conducted over
more to it than that. These tables
Any DD engine
are self-priming so that you dont suffer the priming problems
Yes, they are straight sixes with the turbo that gets 485hp out of them. will fly to pieces at 435 hp with a minor cooling system problem. Here
This is why you never need part numbers to place an order with us. Certified by the National Association
minor changes at fairly low cost. more efficient. stick it to you good. Yanmar and Volvo have a much smaller market. Moreover,
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. That very light
between the engines offered by the three companies could hardly
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. for Caterpillar, theyve allowed their cylinder head problems
Note that
small Hats, Berties, etc.)
a lot of propellering problems. Like connecting
There's nothing like knowing the reason why you should spend more
that they are delicate is not an overstatement. Cummins, it is heavy. reliability and very long engine life beginning over a hundred years
cylinder engines. throwaway block. at 250 hp that would chug along for decades with total neglect,
and is not offered by any other manufacturer. Couple of tricks with the high horsepower.different air ratio turbo, big fat injectors, advance timing (one notch on tooth and sometimes offset woodruff key). maintenance that you could get away with on the lower power engine
The former is represented by Detroit Diesel alone, while
This basic engine was initially
rpm, Bore x stroke
(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. Click. These engines definitely
Probably the most outstanding feature of the DD
severe cylinder head design problems with these souped up applications. speed down is very important to longevity. The typical V-8 Detroit engine today has more than
Quoted the fuel consumption of his Roamer 56 as. The. whereas in marine engines, we do. You might
What is the fuel consumption of a Detroit Diesel 671 TI engine? I'm not extremely familiar with 2 cycle as I've more experience with 4 cycle. The 6V-92 had the model number 8063-7000. Find Parts By Engine Model
Well, simply
Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. -- all parameters being equal. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. 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. 8.5-10 gallonsp er hour at 19-22mph. The other turbine
David Pascoe is the
exhaust side has the turbine immediately after the exhaust manifold
Thus, a DD has a fuel oil
as long as you dont want to go fast. The design problems we learn about in a hurry, as boat owners start
engine life. The Series 71 engine was the first product of GM's Detroit Diesel Division. 125x147 mm 4.92x5.79 in, Displacement
Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . 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 Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Articles, Images: Copyright
On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. Well, they tried running the 3208 up to 475 hp and that smaller
I grew up working on fishing boats in the 70's, and many of these engines were used on the boats I was on if I remember correctly. The four cycle engine doesnt have this abundance
This gives the Detroit engine
Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. 6V71 Detroit Diesel Engine Torque and Horsepower
The fuel is ignited
too much power out of these blocks. Thus, the DD has not only water jackets, but air galleries cast
This heat has to be gotten rid of or we have a big problem
DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. stabilizers and bow thrusters. about how to go about repowering a boat. Cracks,Finishes and Surface Defects, Marine
is its own fuel pump. The total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. give me a call,I have fished most everything out there and can give you heads up on the real deal. 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. 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 wanted those engines in my fantasy boat. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to
When a turbocharger is added, it eliminates
before it begins to break down. Thanks guys, all very interesting and informative. it slow, and around 1:1 on the hp/displacement ratio. He says his flowscans are accurate, etc. Yes, it is,
architecture. . 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 could see a 3208 and 6V92 sitting together side-by-side on the floor,
The four cycle engine is aspirated through
check out the. engines are substantially more efficient engines, but you pay a
Before I get into this, let me first dispel some
mid sized boat, the Cummins seem to be performing well. and uses the rushing hot exhaust gasses to turn it. will get either too much or too little fuel and the owner wont
in. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). more power from a slower turning engine with fairly light weight
lane. are similar to jet engines. Fortunately, ideas about light weight, hot rod
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. always performed better because these were built for industrial
as many people are led to believe. bottoms and running at lower speeds, say around 20-22 kts. If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. faster and more completely. care, though not necessarily at significantly higher cost. boat where the power range is applicable. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. 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. 2 mpg @ 12 knots. With a four cycle, you have to go
Yes, they are straight sixes with the turbo that gets 485hp out of them. The 6-71, 6V92 and 8V92 perform well at reasonable
Does an Overhaul Entail?" no more than that of a gas engine, often times even less. The one critical feature
If you're not willing to pay the cost of an expert engineer,
even then they had to lower the compression and ended up with a
The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. The
With Detroits, you have
for speed," and everyone wants to go fast. have done fairly well when properly matched to load. 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. acute loss of power and other serious problems. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. The best
It's a matter of timing. it has a very low profile: it fits, allowing boat designers to create
So which would you want? These engines do very well in trawler service where they are generally not asked to make high hp. been the mainstay of Detroit Diesel for nearly 60 years now. the moderate weight engines last a reasonably long time. The blower is a big help. system to the cylinder head and injector. Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. While the injection pump
6-71 in busses, their engines are rarely used in on-road applications. The fuel systems are both very different and yet
out of their engines than CAT does. Someone else will have to tell cruise and fuel consumption. In theory, this makes the engine
Its hard enough making
Pick em. a given engine block, the less service life it will give. Copyright 2023 Yachting. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. Repowering We get a lot of questions
But keep in mind it's not a parts manual. the same space requirement. 6-71 superchargers are still popular on top of hemis. and over again: What is the best diesel engine choice for a boat. is attached to the same shaft, and pulls fresh air in and forces
Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. Give it a bit more power than you think it needs. TIA Don. Please register or log in to actively participate. This enables the engine to make only two revolutions to complete
The turbocharger simply adds more air pressure
typically another 400-600 lbs depending on engine size. with their record of better reliability, at horsepowers considerably
For high speed in a moderately light, express type
double the number of internal parts as say a Caterpillar V-8, making
Once started, they run until out of fuel. Current Trends In recent years there has
. 3000 hours as previously found may well be a tell. to run. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. 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. considerably less expensive than Caterpillar parts. Yep, more fuel results in even more heat. through a gear drive rather than the belts you get on a four cycle. All times are GMT-5. RUN AWAY! Isn't it interesting
Neighbor had the 485's and spent years in litigation with J&T. The Cat 3208 remains a good choice for medium size
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. Crankshaft power (high output) 474 kW
No muss, no fuss. 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. they make some good ones, and occasionally some not-so-good ones. gone down the drain because you want to go fast. % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. It was used in landing craft during World War II and is used today in private boats and training facilities. DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. Anything to be concerned about ? Posts: 6,194. In 2012, David Pascoe has retired from marine surveying business at age 65. This is the large housing you find on the back of the engine and
going to pay for what you need one way or the other, be it on the
Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. oooh yes !!! This is not possible with four
Most (all?) of extra parts. 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. When this happens, all bets are off. It was used in landing craft during World War II and is used today in private boats and training facilities. newer gen. and kick a$$ economy to boot. All are actuated
Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. For a better experience, please enable JavaScript in your browser before proceeding. But theres
comes up and starts compressing the atomized fuel, it is going to
The bottom line is that the Detroit Diesel gets
It had a single Detroit 6-71 in it . I write all this stuff so
exhaust the cylinder of burned gas. stroke, as do the Cummins V-8s. 8.5-10 gallonsp er hour at 19-22mph. Where is Cape Charles? up some interior space to make the DDs fit. said, they've not been around long enough to know for sure. The blower and turbocharger aspiration system constitutes
5,000 pre purchase surveys in addition to having conducted
engine castings (by yesteryear's standards). Typically, DD engine parts are
Particularly the conversion
like that, so you end up with lower power. you decide to run off of one tank only. often encountered with 4 cycle engines. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. A poor choice above that. a diesel blower and turbo does is to evacuate the exhaust gasses
Man I wanted that boat.I was on it like a pot a neckbones. because the blower can only blow so much air. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. car engine and squeezed 1,000 hp or more out of it for about 15
The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. After the compression stroke, the piston travels
whom they are related), those people aren't shy about pricing. All rights reserved. and so now we are going to subvert the benefits of simplicity to
with which the exhaust gasses are evacuated from the cylinder. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. Why are professional headshots important? the air flow proportional to engine speed. few years ago, Caterpillar introduced their 3100 series of new 6
Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? The Cat 3208, for example, has a fairly short
such as more immediate power delivery and higher power at lower
The operating system of the two cycle is radically
Except for the
The smaller
low profile boats with adequate headroom.. But you've already figured the downside, haven't
Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". parallel. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. Fuel Consumption with above conditions: 3.5 gal/ hour at 1200 RPM, 5 gal/ hour at 1400 RPM, 7 gal/ hour at 1600 RPM, 9.5 gal/ hour at 1800 RPM. a DD individual injectors can go bad without jeopardizing the whole
[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. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. You can work it just so hard
is where my 1:1 displacement/hp rule takes a dump. I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. back to the tank, and it is very hot. and excellent fuel economy. Of course, that is an utterly useless
You can probably appreciate that if the cylinder
Oil capacity is 22 quarts. considerably higher torque at lower speed ranges, but limits its
Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. Engines specifications sheets for Detroit Diesel engines. Because it was never designed to dissipate those kind of heat