CRAZY LOUD DODGE RAM CUMMINS PULLS THE SLED!!!

[Paintballeretek3]

does anyone else hold their breath with the engine is spooling.. lol?

[11Bulletstopper]

0:25 tingling sensation in my penis.

[aleluya990]

OMG,this is not a car,this is a TANK!!! Unbelievable.. :D

[fordman284]

just spoolin 

[themalibubeast]

sounds like a freaking helicopter taking off

[UncleBubbles94]

You know you gotta gigantic turbo when the driver is stepping out of the truck already and the turbo is still spooling down

[MrDieselsmoker]

WOW... mean truck... dont you just love that diesel smell... to bad you really cant find good cheap trucks like these anymore...

[1951FARMALL]

The guy on the sled shit a brick when the truck spooled up lol

[KuKoKaNuKo]

some of those trucks are scary as shit, wow. I want one.

[CousinG38]

I think that's the Bluegrass Pulling Association. Those are some great events

[Fleeger09]

pretty sure the guy on the sled was like.. HOLY SHIT SLOW DOWN!!

[volvofm1]

nice turbo sound!

[Pentastar018]

Probably the best Turbo Diesel engine ever built. No one can reach Cummins.

[LiftedRamPowerWagon]

GOTTA love the sound of that engine

[aserta]

he lost quite a lot of traction because he had to steer...pity. nice run.

[cammingchevy]

Id that where my helicopter engine went lol

[benvratil]

Epic = @0:23

[spasm027]

@benvratil Yeah I watched that like 498165 times at 0:23. I came every time.

[acumminsme]

Sigma power, sorry

[acumminsme]

Signs power

[mrnatyasable]

The actuall reason why it is smoking like a son of a bitch is because they are just fucking dumping loads of fuel into the cylinders and not all of it is getting burnt.

[coltsfan441]

looks like a train

[wit00051]

Assuming they change the exhaust- i wonder if these beasts could be driven on the street. You could scare a few people i reckon.

[kawirider206]

Dude, its almost retarded that people will buy powerstrokes and duramaxes after seeing videos like this

[Viper44733]

Wow!!! Holy fuck batman!!!

[joffeloff]

Why does it sound like a train on low revs? Turbine restricting the exhaust before it gets spooled up?

[JoelW98GTP]

@joffeloff I think it's mainly because they run such low compression. Can anyone verify this?

[chevysb400]

@JoelW98GTP Um.. Diesels have very HIGH compression because they use no ignition source, combustion occurs when the air inside cylinders is compressed, in turn heating, until it is hot enough to ignite the fuel. These trucks & other diesel pullers/racers sound funny at low revs because of the turbo, the bigger the turbo the higher rpm it takes to spool up, the noise you hear is the engine revs fluctuating while spooling the turbo, then finally the turbo spools and engine smooths out & she smokes

[erk409]

@chevysb400 Thank you, i was wondering why they sound like that at low RPMs

[THEmadmikeismad]

@chevysb400 Close. They sound like that because they are pushing so much fuel. And it doesn't smoke because the turbo is spinning, it smokes because the turbo isn't big enough to push enough air to burn all the extra fuel he's pushing.

[chevysb400]

@THEmadmikeismad Your close.. Diesels smoke because they push more fuel than needed.. and idk what your talkin about with the whole turbo spinning thing... I know why they smoke, its unburnt fuel and carbon particles.. And they dont smoke at first because they are gradually putting more fuel in and upping the rpms so that the turbo will spool and then they can load it up... if they tried to dump fuel in right away the turbo wouldnt spool and it would fall on its face.

[THEmadmikeismad]

@chevysb400 @chevysb400 I think we said the same thing that time. Smoke is unburnt fuel, if the turbo flows enough, the smoke will clear. If it doesn't flow enough, it will continue to smoke. In your first reply, it sounded like you were saying that they only smoke because the turbo is spooled. Just misunderstood you I guess.

[fasterthanyou22]

@THEmadmikeismad youre all barkin up a similar tree. but the smoke IS caused by low compression. The engines need to run low static compression ratio's to compensate for the huge boost pressures the engine see's once it actually gets going. The lower the compression ratio, the more air you can cram into the cylinders. but at an idle with no boost pressure, they will struggle to stay alive since they are just barely able to create the heat necessary to ignite the fuel.

[NVMDSTEvil]

@fasterthanyou22 Diesels do not run low compression ratios to use boost. Thats just gassers to keep them from running lean.

He is smoking due to extremely advanced timing to support the crazy RPM's and high fuel amount he is running with likely 80psi of boost.. thats all.

[fasterthanyou22]

@NVMDSTEvil yes they do...? in any engine utilizing forced induction, the lower your compression ratio is, the more air and fuel can be compressed in the cylinders. Its not just about cylinder pressures in a forced induction application. ESPECIALLY in diesels. The lower the static compression ratio, the more air can be forced into the cylinders, creating a higher dynamic compression ratio; THUS, much more FUEL can be injected, and the more fuel and air you have the bigger the explosion. nice try

[NVMDSTEvil]

@fasterthanyou22 Short stroking an engine to increase volumetric flow is inefficient. For pulling purposes its fine, but as I stated before, its in no way related to use of boost. Its all for the RPM's and fueling rate.

[fasterthanyou22]

@NVMDSTEvil you can have a higher static compression ratio and compress less air to be compressed and injected at a dynamic compression ratio of 30:1, or a lower static compression ratio with more boost at the same dynamic compression ratio of 30:1 which equals more useable oxygen to be compressed and injected with more fuel for a larger more powerful explosion. why do you think that these high hp sled pull engines need so much damn ether to start...?

[NVMDSTEvil]

@fasterthanyou22 which is why I said short stroking an engine is inefficient. Its fine for pulling but inefficient overall.

[joffeloff]

@NVMDSTEvil If you look at new, production diesel engines, including the ultra-efficient ones made for small European cars, compression ratio is going down while turbo boost pressure is going up. It is the same principle as that for the Miller cycle. A centrifugal compressor is a more efficient air pump than a piston compressor. Using the turbo's compressor to compress the air, and then performing only final compression in the cylinder, is more efficient. (Of course none of them are 1:10 .. :p)

[NVMDSTEvil]

@joffeloff Thats mostly due to movement to use of a pre-combustion chamber I believe. High compression in the cylinder is more efficient, diesel or gas. Low static pressure will mean poor volumetric efficiency at low boost which is where 80% of the engine time will be if attempting to be efficient. Examples of poor efficiency at low power are the Ford 7.3 and most tractor engines ;) That said I agree you want efficient turbo pressure which is where variable vane and sequential turbos come in

[joffeloff]

@NVMDSTEvil Precombustion chambers are what the industry has *moved away from*.. There hasn't been a prechamber engine since the 90s.

High OVERALL compression is more efficient - and then experimentation shows that generating high pressures before the cylinder and moderately compressing it inside the cylinder is more efficient. Less friction losses in the engine's moving parts themselves.

No production engines have as low CRs as these pullers of course. Would be undrivable.

[NVMDSTEvil]

@joffeloff 6.5's have pre combustion chambers. 7.3 IDI's had them, both break your "90's" statement.

[joffeloff]

@NVMDSTEvil Okay, well, I meant European diesels. Can't help those lag behind

[traxxasrc97]

I bet he burned a whole gallon of diesel in that run.

[ktm69420]

Sounds like a sigma P pump

[PbNTheory]

Sounds like a fuckin mean beast

[FORDGTFANATIC]

where did you get that grill

[guitarguyf15]

@FORDGTFANATIC

we have one on our cummins too, not sure where my dad got it. Most likely from a dealer on Ebay. It mounts in about ten minutes, no drilling or anything of the sort.

[sonnyc101]

he got first in the super street