AudioVisual demonstration of Detroit Diesel 8V71 firing order (two stroke "supercharged" diesel V8)
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- Опубликовано: 5 янв 2020
- This video demonstrates the firing order of the 8V71 Detroit Diesel, which is a crossplane two stroke diesel V8 with a bank angle of 60 degrees.
Firing order is 1L 3R 3L 4R 4L 2L 2R 1R
Due to the 90 degree crank interval and 60 degree bank angle the interval between successive cylinders firing alternates between 30 and 60 degrees.
1L fires at 0 degrees, 3R at 30 degrees, 3L at 90 degrees, 4R at 120 degrees, 4L at 180 degrees, 2R at 210 degrees, 2L at 270 degrees and 1R fires at 300 degrees (Thanks for the pickup CIPHER :) ).
There are lots of engines I want and this is one of them, the noise they make in person is pretty unique. 
Авто/Мото
I listened to this with earbuds. I can hear colors now.
haha thanks!
That's the crazy thing about two-stroke motors, since they fire every time they reach the top of the stroke they sound like they're doing double the RPM of a standard four-stroke even when they're not. I'm honestly glad he didn't take it all the way up to 10,000 RPM though I don't need my dogs freaking out lol
didn't understand what this comment meant until the engine reached 3k rpm
@@WilliamMoser I Could a Fórmula 1 V10 from the Rubens Barrichello? Could do a F1 V10 Rubens Barrichello noises?
@@WilliamMoser do a Crossplane Detroit Diesel 8V71 V8 engine
8V71 at 4,000 rpm.
Rods, “Yaa in going to head out”
XD truth
One managed to last for 8 minutes at 4500 rpm by bypassing the governor and leaving the injectors wide open. One of the rods and valves was bent and a piston *melted.*
ruclips.net/video/fsCgUJ9nP54/видео.html
aight imma head out
I had to deliver an M978 about 250 miles once while I was in the army. it was the old 4 speed type so going anything faster than 55 was quite taxing on the engine. sarge riding shotgun was like fuck it were in a hurry and we were because we had a helicopter to catch. I put the foot down and for about 4 hours straight, had that 8v71 singing about 2500+ rpm. dashboard indicated redline was 2000 rpm. didn't skip a beat
@@FordGTmaniac That was more like 3600 RPM.
Wow, and it really does sound like the real thing!
It doesn't sound as cool as the real thing and the smell isn't right, but the beat is there.
William Moser That’s quite okay! As a mechanical engineering major, this kinda stuff intrigues me! A four stroke engines fundamental frequency will always be F=(NxRPM)/(120), where N is the number of cylinders and RPM is the engine speed. For a two stroke, the 120 turns into 60, because a power stroke happens every revolution of the crankshaft, whereas in a 4 stroke, it’s every two revolutions. Your audiovisual demonstrations, however, not only has the fundamental frequency, but also takes into account the different engine sounds due to firing order!
I did a bit of noise analysis ages ago using a big dollar B&K 1/3 octave spectrum analyser, it was interesting to see 10 X RPM harmonics due to the electric motor having 10 poles, funny that now a phone app will do similar things for much cheaper.
William Moser There is an electric motor? I though they were just speakers?
this video uses two speakers, no motors - I may have tangent-ed too much, the noise analysis had nothing to do with these videos, just slightly related to the frequency stuff.
buddy has an old dump truck with one of these in it. he loves that damn thing.
If I had one i'd be driving it now
@@WilliamMoser Can i Could a EMD 645E Diesel V16 Turbocharged engine
Was really hoping to hear it go to 6k so I could relive the most haunting noise ever.
Have one run away on ya once? 😀
@@spiv_gennedy not an 8v but a 60. I went home for the day.
@@LazySniper Yikes. That's a lot of motor goin' round awful quick...
@@spiv_gennedy before I jumped in the sleeper, I think I saw the tach max out
How much power do you think, say, a 671 would crank out while running away?
Good ol detroit that has no intake valves. They sound wild in person
0:10 exactly what an 8V71 sounds like at idle!! Interesting fact for those Detroit engines. The first number is the number of cylinders that engine has the second is how many cubic inches each cylinder displaces. Although it just occurred to me if you’re watching this video you probably already know that.
and the V means it's a V engine, if the code doesn't have a V in it it's an inline.
And the 567 engine, used in trains, generators, and ships, is exactly twice the bore and stroke of a 71 series (a good giveaway is that 567 is awfully close to 568, which is 8 times 71).
man pop sound turns into engine sound is so satisfy
I’d like to see how a rotary engine would work with this
It fires twice per rotor (-5 and -12degrees TDC)and would sound largely like a motorcycle engine
it would just be 1 2 1 2 1 2 1 2
**Small-block EFI V8*
Would be cool to hear the 6V family of Detroit Diesel.
You
Ever hear :50 and you're fired
That's the sound when Big John the farmer gets his produce to town.
We use these motors on the US Air Force flight line in aircraft loaders. It's crazy how realistic this sounds!
**Militarized CAT 3408 engine*
Binged watched all of these videos and this one is my favourite, good stuff.
wow thanks! yeah this one has a certain charm :)
this has to be his most realistic sounding engine
0:54 Sounded funky for a sec.
I captain'd a Hatterass for 15 years that had 8V-71s. As soon as the vid began I said "Yep. That's what they sound like." At 2,500RPM I said '"Yep. That's what they sound like at no-load max RPM." When I saw the tach keep climbing, I said "Hmm I guess we'll hear what they sound like in a run-away condition"... What was missing was the BANG when rods come out through the block. Cool Stuff. Thanks for the memories.
Haha cheers, it's always good to hear from people who have been around the engine in question, i last heard a Detroit Diesel on the road about 25 years ago.
**CAT 3408 engine*
A detroit diesel is a sight to behold
I work at an airport that uses an Oshkosh firetruck with a Detroit 8v92ta that sounds fucking incredible. The firefighters screw around with it all the time just flooring it everywhere. One time I got them to rev it up for me after they stopped by our hangar. Blasted my little bean into the next dimension.
i'd have one if I had the money and the room.
**Militarized CAT 3408 engine*
This is your best one yet! Any way you could rig the demo so we can hear it go through the gears? That would be awesome.
Brutal this videos. More videos please 😍
Very unusual firing order for a crossplane v8. It's firing order is very similar to a Flatplane firing order. (1-6-3-5-4-7-2-8)
The unusualness comes from the 60 degree bank angle and two stroke cycle, took me a while to work out how these engines didn't fire two cylinders at a time (when I thought they had a 90 degree bank angle) and a while longer to work out how to simulate it.
I ran a old slave tamper a few years ago with the same engine. Was straight piped. Could hear it rolling down the tracks a few km away!
Screamin' Jimmy! I can almost smell it.
Love your videos, by the way. I came here for the Yamaha R1 crossplane I4. What a great engine.
Cheers! Yeah that one turned out good
At first it sounded like the song "Running in the 90s"
Nice sound at high revs
8V71 is my favourte diesel sound idc about the cummins or powerstroke boys but when your diesel sounds like a sports car boy thats where it gets fun
Haven't heard one in the road in years, so sad.
Nice!!
cheers!
Screaming Jimmy comes to life.
It sounds like it's reving way more .
Hey Do you have a rotary single , two, three, four, six. Rotor video coming up.
It's because it's a two stroke, I didn't know what was going on the first time I heard one on a highway. Might do rotaries some day if I can work out a good way to represent them. and what magic makes them go.
Double the bang for the same rippems
@@WilliamMoser wankel rotaries act like and sound like 2 strokes with the same cylinder to rotor count and firing interval. Look up 2 stroke straight pipe triples and then an n/a 20b and you'll hear it.
Also, I have a request of my own. Can you do a 90 degree single crank pin 2 stroke v-twin? I wanna see if the 2x power strokes make it sound like a 90 degree 180 crank v4...
Also 12v71 and 16v71. Hell, even a 6v71 inline. A 5-cyl 2 and 4 stroke would be interesting as well, not to mention 7-cyl and 9-cyl inline, and v14 4 stroke, all even firing.
@@WilliamMoser i Could a Mercedes OF-1315? Firing order:1-2-3-4-5-9-5-6
@@WilliamMoser after 8V71,put a Detroit Diesel 4-53N (two stroke "Supercharged" diesel V6)
Scream Jimmy!!
Wonderful! Can you please do a Detroit Diesel 6-71, the straight 6 one?
I'll put it on the list
@@WilliamMoser Thanks!!!!
@@WilliamMoser ☝ *"HOLD IT!"* ☝
How about a *_four-stroke,_** cross-plane conversion* of the Detroit Diesel 8V engine *(53, 71 and 92)?*
@josecarrilloii4036 I did a cross plane version of the flatplane Ford GAA V8, that has a 60 degree bank angle.
Oh man yup exactly like the older pushback at my old job.
Oh wow!!!
It sounds like my old watertruck
Diesel VTEC kicked yo
Honda Rolling coal!!!
Honda actually makes diesel engines, who would have thought?
technially as far as im aware the reason why its supercharged is not to necessarily provide boost but to actually the engine work because its 2 stroke
That's right, they can't build boost, it's impossible, which is why they call it a "blower" not a "supercharger", and they don't run worth a crap without one. When the piston is at BDC, it opens ports in the cylinder to let the new air charge in while the exhaust valves in the head are open. The blower literally blows through the cylinder to blow the exhaust gas out and blow fresh air in. Since it's a "blow through" design in that way, there is no way to build boost, as opposed to a 4 stroke engine, in which a supercharger or turbocharger will blow the air against closed exhaust valves, creating pressure.
@@livewire2759 i thought so
Süper 👍
Please do Unequal V6 firing (90 degree bank, typically Honda NSX NA1/NA2 or Buick Regal) and Unequal V10 firing (90 degree bank, typically BMW M5 S85 or Dodge viper)
looks like the C30A and C32B have offset crankshaft journals, making them even fire, the earliest buick V6s were odd fire but then they changed to offset journals. Might be able to do do an oddfire V6, can't do odd fire V10s currently.
@@WilliamMoser okay
Maybe Odd firing V10 someday.
maybe!
@@WilliamMoser Could a Do a Baltar 60 degree V8 (Two Stroke "Diesel V8 Aircraft") AudioVisual Demonstration Firing order Bank 34 Valve DOHC
I didn’t realize how low this engine revved
Tachometers for these engines rarely show more than 2500 rpm, and they sound like they're going to explode at 2,000.
Typically in trucks most Diesel engines rev no higher than 2100rpm. In marine applications the same engines are often revved quite a lot higher and make more power regardless of whether they're two stroke or four stroke.
For example some Detroit Diesel two strokes - say an 8V92T in marine use, output 600hp and do 2500rpm.
I've even seen listings on the internet for marine inline 6-71 turbo engines with 550hp. Stock, turbo 6V71 or inline 6-71 never put out anything like that in trucks let me tell you.
In truck use, AFAIK there was no turbo 8V92 with a stock rating higher than 475hp but of course people opened them up to make more.
You Could a 5.7 Voodoo V8 with a 2.8 V6 Ecoboost engine swap!!!!!! 20000HP Launch control,Idle and Driving!!!!!!
Remember these fire every stroke. So 2000 rpm should sound like 4000 on say a Cummins.
Please make a video comparing Laverda 120° crankshaft and 180° crankshaft triple engines. Thanks.
On the list video
This is like two inline 4's, interesting
👍 👌THX so much ! I was looking for this from long time ! Excellent video ! 😊
Btw, i have to do a V8 to V4 with a 8v92 detroit .. For taxes reason... Is one of you did this ?
Haven't heard of that before, how were the other cylinders blanked off? Thanks for watching!
Hi@@WilliamMoser,
Thx for your answer. I'm seaching somebody who already did this downsizing conversion.
I think it's possible to blank off one bank on this detroit v8, for sample. Because this two stroke engines have a different firing order than classic 4 stroke v8. So, each side of the detroit is doing like a simple 4cylinder firing order (1342).
On a classic v8 (4stroke) to do a downsizing it must be done two cylinder on each bank, cyl n°3/5 and 2/8, to have a correct balance (like old Cadillac V8/6/4).
Looks like simple to do, but.... 🤔🤨 Not really sure of the result....
Here in Europe taxes for big engines are ENORMOUS !!! and my only solution will be to do it. Hope to find somebody crazy like me who can give some more infos... 😉
👍Thanks a lot, and habe a great day 😊.
Bruno. 🇫🇷
@@brunogrpr5259 the 8v71 has a crossplane crank so treating it like a V8 with displacement on demand would be the way to go. You would want to make sure you can reclassify it too, could be less trouble to replace it with a 4-71 or whatever Cummins is the go.
Ok i understand, and in this case it should be possible to disconnect 2 cylinders each side like a for stroke ? Do you have an idea wich one need to be disconnected to get the best balancing in V4 ? 🤔
My guess would be the inside cylinders (2L, 2R, 3L, 3R) as the counterweights are smallest there and you wouldn't want to remove one connecting rod from a shared crankpin. You would need to block the inlet ports and remove the exhaust valve and injector rockers too. You would also need to underdrive the blower, which might be tricky, or fit a smaller one, which might be tricky and expensive.
Jesus Christ, it’s terrifying seeing a Diesel engine go above 2000 rpm.
200?
@@ukkomies100 oops
Interesting sound. Could you do a TVR AJP V8 next? 75 degree flat plane V8. Or for more fun, a Radical Powertec V8. 72 degree flat plane.
Not properly, the common factor between firing events would be too small.
@@WilliamMoser Aah. That's a shame. Would be fun to hear the flip flop as firing goes between 75 and 105 degrees per pair of cylinders on the TVR engine.
Anny chance we will ever see / hear a auto union v16 on your channel? :-D
A slim one, I'd have to work out the firing order and make new lights as I only have 12 at the moment an I think some of them are lost.
Makes sense why they rev so low
Make the Detroit Diesel 6V71
1.5x parece o som do JBL estralando
great as always
I did some math & might be wrong but doesn't 1R fire at 300 degrees?
No you're not wrong, it was right in the program/video but wrong in the spreadsheet where I had it written down in, cheers!
@@WilliamMoser ma pleasure mate, cheers ;]
i think your tach is off by a factor of 2. They still idle at 500-750... it was only showing like 150 or 200...
Still, thank you for the detroit 2 stroke!
He was starting at 120-130 RPM, thrn ramping up to its idle speed.
How about a 6v53?
Valtra A950 4 cilindros
at 2,000rpm to 3,000rpm it sounds exactly like a detroit diesel to be honest.
4-53 next?
Might not rev high, but such an engine has the torque to tear reality itself asunder.
Pls do a Marcopolo Invel 1974 Engine (Volksbus Kombi Chassi engine)
For some reason sounds like a flat four and also the ford/saab v4.
6V series (6V53, 6V71, 6V92)?
Could a Apache AH-64 Helicopter engine? Is a 11 22 55 000 22 66 78 sound like a W12 engine in the video
Soon
Flatplane V8 Sound
There is a saying that “The number of cylinders represents justice.....”
Sounds like warboy talk
So how fast was that.
0:48 Chevrolet D60 com pente na turbina que mais o Tchiuuuuuuu tchiuuuuuuu
Esse só faltou o pente na turbina mesmo
**GM 6.6L Duramax*
DD has a redline about 2200
Mazda Rotary next..?
So a crossplane two stroke diesel fires "similar" (L-R-L-R-L-R-L-R) to a flatplane petrol V8? What about a crossplane 4 stroke diesel? I assume they are L-R-R-L-R-L-L-R?
Same bank alternation, different rhythm.. Yes a crossplane 4 stroke Diesel would alternate like that, no different to a petrol 4 stroke crossplane V8.
William Moser Always coming through with the knowledge. 👍
Sounds like a twin stick.
Do a 6V92
O velocímetro igual velocímetro de mobilete tipo hero puch
Wow this order is weird- I thought it to be like a typical V8
Please do duramax diesel and power stroke diesel and then do Cummins
they would all sound like normal V8s with my setup
Can someone convert that Detroit Diesel 8V-71 engine into a *90° cross-plane **_four-stroke_** OHV (overhead valve) fuel-injected V8 turbo-diesel version?*
Do the 12V92!
Maybe, I'd have to look into it.
Wow.
This firing order really doesn’t like rpm. I know it’s diesel but sounded out of steam at 2k
Have you done a Detroit 3/71 yet?
no, it would be the same as my 3 cylinder video but the tacho would read half as high.
Ford Model A 1929 Vintage please?
Coming soon
Please,can you 180 Fiat 1.5 Fiasa in the fiat uno and palio
On the list video
Coming soon,some day
Man can you simulate a running away with one of these detroit diesels
possibly, it's just not the same without the smoke and water and oil puking out though!
@@WilliamMoser simulate it as blown after some time, I mean like suddenly engine stops and locks cuz of over torque, maybe a ticking sound effect and engine starts to give abnormal sounds and at the end there is a hard knock sound and stop
@@WilliamMoser I mean not needed steam or smoke or anything like that
In what vehicles can we find thing engine?
Oldish trucks, buses etc
Any truck and bus built from the 1960s to 1987. 1986 was the final year for buses to have this engine...
Heh :D this one revs only to 3.5K rpm. Thats some attention to detail.
I still want to hear it at 10,000 rpm... just because you'll never, ever hear a real one do that!
Firing oder in 2 stoks v8
Red line it!
LOL, he doubled the "red line" already!
Did you nake it with microcontrollers?
Yes, Arduino
@@WilliamMoser noice. 😁
That thing is fuckin screaming at 3k
They sound even better in person when overtaking you on the freeway
Coloque no d60 do carlinho gato.
D60 do Carlinho vai ficar com ronco igual v12
Man can you make a Mclaren F1 V12 please?
Maybe some day
@@WilliamMoser thank you man, i appreciate your work
17th \o/
Yes but they're not supercharged. The Roots type blower is used to aspirate the engine. Even Detroit Diesel call their blower only engines as N for Natural and I guarantee you don' know more about Detroit Diesel Uniflow engines than Detroit Diesel. The turbocharged variants are forced induction but still retain the blower, because without the blower it wouldn't start of idle or accelerate before the turbo starts producing boost.
Supercharged involves air supply greater than naturally aspirated air demand.
Yep, that's why I put rabbit ears around supercharged. "So called". Didn't know the 92s etc had blowers too, Interesting.
Please,can you a 180 graus Opel ascona c,Kadett and Chevette? Hehehehehe....
are they just 4 cylinders? this one should do ruclips.net/video/FUo2JC6pDKI/видео.html
Nope,is thank on the 180 degree from the Opel engines on the way not 4 cylinder engine is a different numbers
Yes,coming soon
16v747 from big bud please? 😁
I don't have 16 lights. I wonder if they offset each crankshaft by 45 degrees for a 16V71 though...
@@WilliamMoser How many lights do you have? And would it be possible to do a v3?
@@ffivguy1990 I think I have 12, what has a V3?
Suzuki RP68, Honda MVX250F, Honda NS400R, ANZANI W3, DKW RM 350, FUELING W3, Honda NS500 and Honda GL
Scania engines please!
Some day
Only disliked cuz you didn’t send it to 10k lol
eventually I will manage to cut down a 6V53 to make a Vee-twin engine.
that would be too cool! and the sound!
2V53 would be cool, did they make 2_53s?
@@WilliamMoser no, they made inline 2s, 3s, 4s and 6s and a single cylinder applications but the vee style engines were at least 6 cylinder
@@WilliamMoser yes there was an inline 2-53 engine, there is a video of one installed in a Ford F-100, My interest is in building a block and heads out of aluminum for a V-twin.
That's good, means an appropriate sized blower (or turbo?) exists. I'll check your channel out, need to get to the 12 and 16v71s some day, might look at the inlines too some day.
Hey!eu não a Bia eu sou o Renatinho
Why didn't you show us 10k
PLEASE SOMEONE OVERLAY A JAKE BRAKE ON THAT
I tried to simulate the idle hunting but it was too hard. Maybe some other time
@@WilliamMoser BTW I made an animation on my channel calculating the z4 idle from your 6 inline video
I'll check it out!