Tractor Puller - Checkmate - Detroit 12V71TT

[HotForgeChaos]

A healthy Detroit there. Pretty damn good pull

[12VPULLER]

This tractor has no governor, actual runs out of fuel at 4500rpm , mechanical tach, driven off the factor adapter to a tach to match,ratio runs 12v149 fuel pump. yes rack adjustment is very important.

[MrShowdown55]

@12VPULLER this tractor engine will turn 6000rpm because of the fuel pump size

[1SixpenceFan]

Not up to par, I've heard about a dozen 8v71 Detroit Diesels that would give this tractor a run for it's money. Most Detroits that you have ever heard are not tuned right most of the time the rack isn't set right. They run ok but not what they could be.

[joedrummer2010]

Sounds like typical 12v71 governed 2800 rpm to me..... but I could be wrong...

[TipikulBob]

@joedrummer2010 You're a little high at 2800 - they're actually governed at 2300, but yeah, I'm still with you - if they think that's 5800 RPM, they're smoking crack...... it's a two-stroke: twice as many exhaust pulses per crank rotation.

[12valvepower1]

how do the diesels work when the turbo is fed by a blower. is the blower feeding the exhaust turbine, there by allowing the induction turbo to compress air into the engine.

[AmoralEngineer]

@12valvepower1 The blower creates all the exhaust. The exhaust turns the turbo which feeds back into blower.  With a blower bypass, all "over pressure" between the blower and turbo is fed directly into the airbox. He almost said cummins when introducing the tractor hahaha

[madtownmadman]

@12valvepower1 The turbo feeds the blower. All 2-stroke Detroits are naturally aspirated, unless they are turbocharged as well. The blower, or blowers (in the case of a 12v) in a v configured Detroit sits in the lifter valley. It moves spent gasses out of the engine, and allows fresh air to be ingested. Thats all they do. No boost is produced, unless a turbo is plumbed into the intake, to provide positive manifold pressure.

[GARIDONNELLON]

Fuckn mean

[joffeloff]

That doesn't sound like 6000rpm at all. Remember it's a two-stroke, it sounds 'twice as fast'

[12valvepower1]

it needs nos

[SeaDollarsBertram]

5800 RPM??!?!!!!! It's a Detroit alright lol

[trkklr77]

they are fuel goverend to 3k-ish for reliability, you can spin anything fast for a short burst.

change the governer rates and you can feed it till your fuel pump wont push enough.

53mm injectors are what you would typicaly find, my buddy ran some 140's on a 453 and it was insane, those have to be some monster turbos to feed that motor with 240's

[joedrummer2010]

How do you get a two-stroke diesel to rev 6K RPM? The rotating assembly limits RPM to about 3K, doesn't it? It's the extra weight of the heavier-duty stuff. I'm confused how this is possible without changing crank, pistons, c-rods, etc..... forgive me, I'm new to a 6K RMP diesel!

[onthegaszr2]

Was this is BC or AB?

[bingorobins1010]

i just watched this tractor attempt a pull yesterday....they said it's been modified too rev over 6000RPM...... it stalled out on the track and wouldnt start after.....it suuuuuucked.

[12VPULLER]

@bingorobins1010 Guess thats what happens when runs out of fuel at high rpm

[psychotikpaisano]

that left bank was having some trouble...

[markification]

On these engines the super charger pushes air in through ports at the bottom of the cylinder and exhaust gases exit through the valves

[ccmutlu]

Yeah, kill the planet!

[WTFchuck100]

dont like it! dont watch!

[RichardEllisxyz]

The exaust note on all two-stroke diesels is very deceiving as there are twice as many power pulses compared to a four stroke. The net effect is...They sound like they are turning faster than they really are. Reading a tach on a two-stroke will give you very suprizing results.

[SFINX01]

real american smoke factory

[woodyate]

if its a 2 cycle engine does it have valves or a reed valve

[druidg]

they have intake ports on the bottom of every cylinder, and exhaust valves for every cylinder.

[tpvalley]

read uniflow detroit diesel on google.

[mageac]

it has exhaust valves and intake ports in the cylinder wall

[fixitdude74]

considering these engines were never designed to go past 2600RPM!!! 5800RPM is manic!!

[TurbinePower69]

fixitdude74.....in marine trim, these engines (all the 71 & 92 series) run in the 2500 - 3000rpm range all the time.

However...I think the "announcer" isn't real

knowledgable in the engine dept, if you really listen to him...and I seriously doubt

that it's turning 5800...it MAY sound like it,

but remember, it's a 2cycle and using center outlet manifolds, which makes Sound Like...it's turning conciderably faster than it really is. I've owned and "built" 3..12v71's in trucks & 2850rpms.

[1978oldskool]

turbine power this thing does turn at 5800rpm.. ill get you some more specs on it tonight

[benchracerX]

it probably does turn that kind of rpm when the gearing and weight are right; it kinda sounded like it was bogging a bit.

[BIG379]

@TurbinePower69 and that shows how ingnornant you are! in a big truck 2850 is the max on ANY 71 series Detroit Deisel BUT properly modified they can see in excess 6000RPM.

[TurbinePower69]

@BIG379 Thanks for your comments......however I don't prefer to think of

myself as being too ignorant........especially on this issue......do you personally

know me ?.......or my years of affiliation directly with Detroit Diesel ?  Have a nice day sir.

[noshsreqd]

It would be nice to hear this one when it really runs right, it revved nice in the beginning but was sputtering as soon as he put the power to it, like the injectors were starving for fuel. I'm sure I saw this same machine pull in Spokane, Wa several years ago, I even have a few pics. The pull was at night and mid-track the entire exhaust system was red hot, it was running phenominal then and having had much experience with Detroits, I'd say it was turning well over 5,000 much to my disbelief!!

[noshsreqd]

Ok, I listened to the video again and it is definately the same machine I saw about 10 years ago or so as the commentator mentioned it used to belong to Bill Cole. Back then it was called the "Vindicator". Nice to see it still in action.

[wayfastwhitey07]

its amazing the IP's can even keep up at that rpm you would think that even a hopped up pump would have trouble pushing enough fuel; and you can tell even though motor runs phenomenally that it still has no where to put the power!, still damn amazing machine

[tpvalley]

u would wonder how it has time to inject mix and burn in the cylinder at that speed thats nearly 100 times a second (6000rpm, this revs at 5800rpm)!!!!

[BIG379]

@tpvalley diesel still is a compression fired engine so yah its capable

[tpvalley]

@BIG379

er, what?

because its compression ignition its limited in rpm by the time u have to inject mix and ignite fuel at high rpm by the time it starts to ignite the piston is way past tdc so hardly any power is produced at them rpms, for this to work at such rpm is genius, the fuel must all be injected really early and in a short time because u only have 1/100th of a second for all of this to go on.

[oldskoolcoinop]

Holy SMOKE!!!

[12valvepower1]

the audio preview button is as much fun, as a barrel full of monkeys

[stefanozf83]

Best Detroit Diesel! This Engine "12v71" as a 1000 HP by twin Turbocharged or not?

Dispalcement where is?

[willbill808]

That sounded more like a V8 than a 12v71

[12valvepower1]

ist just a big inch v12. big v12s dont scream much . they bellow

[12valvepower1]

i was at a tractor show.. and saw a steam oliver tractor. OMG was that thing huge.

[bwklinger]

that thing is a big helper to the green house effect

[tpvalley]

I have no opinion yet.

Is there a possibility that the greenhouse effect is nonsense? the planet going through a cycle of hot then cold etc for millions of years.

In the past 6 years the temperature has dropped on average! (I may be wrong about the "6") :-)

[OzzInter]

More dragster than tractor!!!

[acuarofilio]

with tires muevetierra who can not

[whb1965]

he should have went first class, and built a tractor with a cat..lol

[nemoswint06]

My grandpa always told me when I drove his log truck, you gotta be pissed off to drive a Detroit. and DAMN this thing is pissed!! lol

[acuarofilio]

How much has the cubic capacity tractor and engine type has

[ilikecars1]

852 cubic inches, which is 14 liters

[capridrifter]

My gf loves watching the tractor pulls last time we went out to the mud bogs we had a truck tug A war contest and it was pretty cool...These vids are awesome but its nothing like seeing them in person:)

[boogerwelds]

its a 2 stroke diesel. it has to use the blowers in order for the engine to run. the turbo's just pressurize it more.

[12valvepower]

i would think the blower would pressurize the turbos.. the blowers run off crank.. the turbo off exhaust. i would think the blowers would pressurize the turbos

[ronbo86]

the blowers air goes strait into the airbox y would you wont it to pull air tords blower then pulled away to turbos then to airbox

[Bear5434]

sweet

[tpvalley]

By 240 mil injectors, is that a referance to millilitres flow for a given time or something?

I wonder, do the turbos bypass the blowers on full boost or just pressurise the air going into blowers?

[nm389]

they pressurize the blower

[tpvalley]

Thanks, we dont have detroits here in UK, I saw one once only in a scrap yard.

Lovely sound.

[drockpile]

240 mililitre per injector shot

[BMW620]

it smokes like a steam-locomotive

[12valvepower]

oooooooooooottaaaaahhhhhhhhhhh­hhh

[12valvepower]

pullin

[dieselislife2]

2500

2500

-----

5000

[dieselislife2]

four forced inducers..

[dieselislife2]

m88 tank motor? or truck engine

[12valvepower]

yes, detroit 12v71tt

[12valvepower]

truck

[farns2007]

Is this a detroit two stroke

[2008Cummins]

Yea it is

[ladaladaladalada]

yes, the detroit diesel name tags are stock

[tpvalley]

har har.

I wonder though, do they use modified detroit heads or build their own from scratch?

what about the block, it is probably reinforced, but u necer know, detroit diesels may be really strong!

3-5 gallons every etc etc!

[tpvalley]

Are any parts standard on this engine?

The block, the heads?

[01ltlb7]

5800 RPM!!!

[ladaladaladalada]

provo utah...

[ladaladaladalada]

like i said, stififffffffffffffffffffffffff­ffffff

[louswire]

think about it... those exhaust valves are cycling @ 5000+ times per minute... in a four stroke motor that's equal to 10,000 rpm... impressive when you consider how big and heavy the valve train parts are.

[ladaladaladalada]

never really got her singing like it oughta

[dmaxking]

the valves do open every revolution, thats why detroit designed them like a race engine. the rocker arms screw into the pushrods and lifters for high rpms. in case there is any valve float, the valve train wont come apart. the reason why one side smokes more than the other is because of the fuel rack settings. its easy to get a detroit fuel rack a little leaner on one side than the other.

i love how he is running 240mm injectors, and stock is 53mm!

[TurbinePower69]

The "commentator" is "whacked"...there are no

"53mm" injectors from DD....the only "53" anything from DD was the 53 Series engines.

The 12v71's came stock (in "naturally" aspirated form) with.."green tag"(in trucks)55,60 and 65mm injectors....although there were 45 and 50mm injectors available....they

were not used, as the HP level was too low

with them....defeating the purpose of having a

"12" in the first place. 240mm injectors are

custom built and not available from DD.

[12valvepower1]

2200 rpm

2200 rpm

--------

4400 rpm

[TurbinePower69]

2200

2200

----

4400 rpm........???? Please explain your

equation.

I totally understand your math....but what is

your point of it ??

[12valvepower1]

the commentator was off.. he said 5300 rpm.. twice the rpm is 4400rpm.. not 5300. 5300 rpm would be twice of 2500 rpm. 2500and 2500 is: 5k rpm.

[TurbinePower69]

The commentator is "off" totally. Even with the weight and mass as "light" as it is [in comparison to 4 strokes, in the same displacement range], for the crankshaft and rods...4400 rpms is a good 900 - 1000 rpms too fast for the mass, without it "self destructing". About the maximum "you" can spin the 71 series ..and still remain "in tact", is about 3300, although I've seen a few of the "sled pullers" turning at 3500, but longevity is not good. Factory marine "71"DD's turn 2550.

[tpvalley]

But with a detroit the exhaust valves open every revolution so valve bounce is more likely!

The weight of the pistons and crank etc will be just as heavy as a 4 stroke, it still has valves in head.

I have seen tuned detroits rev to over 4000rpm, theres quite a few on youtube, they sound insane!

I wouldn't stand to close though!!

[TurbinePower69]

Thats why "they" (as I did in mine) "build" the detroits with the "good" marine parts, and

valve spring rate is conciderably higher then

those used for truck & industrial applications

..to allow high rpm without bounce...but

even so, are only good to about 35-3600 rpms.

SOME of the 12-71's on youtube [ie:"Checkmate Pull Tractor] "SOUND" like their turning 4000+-,but if you'll notice,he's

running a "center outlet" ex.manifold which

always sounds like their turning faster than

they are.

[tpvalley]

A bit like 2 seperate exhaust outlets sometimes make an engine sound like it lower revving u mean?

U sound like u know more about these than me;

I've got all my info second hand if u know what I mean: I live in UK so I have only ever seen 1, on a generator, looked good, clean etc, limited uses in UK so it was for sale for about £50 ($100).

If I only knew what it was then!

It was a v8, spotlessly clean and painted blue.

Perfect for a boat.

Can u still get spares for them?

[aaaaaaaambmaaaaaaaa]

the Series 60 14.0 and 12.7 are nice,but they just don't sound as sweet as the 92 or 71 series

[TurbinePower69]

Thats because the Series 60 is a "boring" four

stroke.

If you really want to hear "Big Balls",you

should hear the 8V and 12V149's especially

when they've been "tweaked",But none

of them have the sound of the 12v71, as it was

the ONLY 12 cast as a single block, and had its own, unique firing order,and REALLY

awesome sounding when using "rear outlet"

exhaust manifolds..listen to "Wildfire" the COE KW sled puller, or "Lady Butterfly" the

KW W900 conventional of John Manning, on YouTube.

[TurbinePower69]

OOPS....Forgive me, I said "the KW900 of

John Manning".....I meant John MANN.

[stx450]

Looks like a interesting setup is it Water-Meth Injected like other diesel pullers and also is it intercooled

[ladaladaladalada]

provo is down the west coast

[671Detroit]

That's just awsome!

[Drivenout]

I've heard this bugger run in real life... that was just music to my ears.

[TechMaven]

Looked like it was in need of more fuel, the one pipe was smoking less than the other..Seemed down on power to me.

[RussellDetoyato]

Thats What Happens when one turbo Overpowers the other

[ladaladaladalada]

it can only put down alot of power on one bank, while the other bank puts out normal power, it will pull strong, but not as strong as it could

[anythinggoes31]

What a wild video Gittr Dun!!

[diesellover]

STIFFFFFFFFFFFFFF exhaust valve springs..

[a9d]

how can u tell?

[jaggass]

how did you increase the redline to 5800RPM?

[TurbinePower69]

He didn't....the "announcer" hasn't got a "clue". With marine springs (on the exhaust valves) "you" can turn them up to about 3300 to 3500rpms. He would have had a lot better pull, in this video, if had it in a lower gear, and allowed the engine to wind up....so as to get it up into its horsepower range, rather than trying to pull it with torque, and not getting very far.....but, still managed to get the sled a fair ways down towards the 300ft mark anyway.