POWER!!!!

[Robert Zambelli]

Need more power?
This is for you!!

  Bob Z.

   http://www.thesmokingtire.com/2010/video-24-cylinder-12-blower-diesel-pushes-the-dyno-to-the-limit/

[Steve Helmick]

Actually...some things don't make sense. I suspect the video maybe was staged. There seemed to be nothing coming out of the zoomie stacks, and even at idle during warm-up, the injector butterflies were full open. If there had been any bay doors, they would have been open, and there was no evidence of that. I know diesels are different than gasoline engines. Typically, on a dyno, the exhaust is ducted outside through a muffler system and flex hose. Yes, the Gilmer belts were moving, but still.   

These Detroit Diesels are "2-cycle", with exhaust ports cut in the cylinder walls exactly like a McCoy .60. But there is also a cam that operates a valve in the cylinder head, along with a glowplug and probably an injector. I really haven't got my mind around that yet. I helped take one of these (a straight 6, I think) out of a fishing boat...maybe 60' or so. We took it apart and hauled the pieces out. They are high rpm engines and are not fuel misers. Then, we put in a bigger diesel... probably a Caterpillar, but maybe a Cummins. Bear in mind that this was about 40 years ago, on a Monday.  Steve

[Larry Fernandez]

Horsepower is great and torque is even better but if you cant put it to the ground, your pissing in the wind.
My very good friend Scott Jones and I have been trying to one up each other for thirty years now. My latest endevoure is my 68 el Camino.

My new 468  motor makes 585 HP @ 6300 RPM and 605 Ft pnds Torque @ 4500 Rpm(Before nitrous). Respectable numbers, but hooking that kind of power on a limited tire is where the fun come in.

Much like our C/L motors, we now have access to HP but we need to know how to use it to our advantage.

Bottom line, you can never have enough horsepower. NEVER.

Larry, Buttafucco Stunt Team

[Randy Cuberly]

Actually...some things don't make sense. I suspect the video maybe was staged. There seemed to be nothing coming out of the zoomie stacks, and even at idle during warm-up, the injector butterflies were full open. If there had been any bay doors, they would have been open, and there was no evidence of that. I know diesels are different than gasoline engines. Typically, on a dyno, the exhaust is ducted outside through a muffler system and flex hose. Yes, the Gilmer belts were moving, but still.   

These Detroit Diesels are "2-cycle", with exhaust ports cut in the cylinder walls exactly like a McCoy .60. But there is also a cam that operates a valve in the cylinder head, along with a glowplug and probably an injector. I really haven't got my mind around that yet. I helped take one of these (a straight 6, I think) out of a fishing boat...maybe 60' or so. We took it apart and hauled the pieces out. They are high rpm engines and are not fuel misers. Then, we put in a bigger diesel... probably a Caterpillar, but maybe a Cummins. Bear in mind that this was about 40 years ago, on a Monday.  Steve

While I'm inclined to agree with some of the things you've said it is possible to throttle a big diesel like this just by controlling injector pressure.  The butterflies would in this case simply stay open and the engine speed is controlled by the amount of fuel injected irrespective of the air intake...compression is high enough to ignite the mixture even if it is very lean and speed is controlled only by the amount of energy released from the amount of fuel burned.
We used to test big Detroit Diesels this way at Woodward Governor when I worked there as a young engineer in the test cells in the early 70's.
If in fact this was being done the mixture would always run lean and no visible smoke would come from the stacks except at startup and I did see that in the video.

Randy Cuberly

[jim gilmore]

Anybody note that they were engines for a yacht.
double what was in the pt boats of ww 2.

[Perry Rose]

The superchargers should be over driven to make power. These look to be one to one or even under driven..

[Greg McCoy]

Who says size doesn't matter. Worlds largest diesel engine, made in Finland.

http://www.amusingplanet.com/2013/03/the-largest-and-most-powerful-diesel.html

[Tim Wescott]

I was told, by a smart guy who drove lots of trucks for a fire department (my dad) that all diesels work with the induction system wide open, and throttle by controlling the amount of fuel injected into the cylinder.

The "throttle" valve is there as an emergency shut-down, in case the engine won't shut down for some reason.

[Randy Cuberly]

I was told, by a smart guy who drove lots of trucks for a fire department (my dad) that all diesels work with the induction system wide open, and throttle by controlling the amount of fuel injected into the cylinder.

The "throttle" valve is there as an emergency shut-down, in case the engine won't shut down for some reason.

Hi Tim,
While that's probaboy true for most truck and smaller engines it's not necessarily true for large Diesel engines used in Marine applications or as generators.  It's possible to throttle them by several methods using load control as in a generator.

It is the most common method of controlling speed however!

Randy cuberly

[Douglas Ames]

I was told, by a smart guy who drove lots of trucks for a fire department (my dad) that all diesels work with the induction system wide open, and throttle by controlling the amount of fuel injected into the cylinder.

The "throttle" valve is there as an emergency shut-down, in case the engine won't shut down for some reason.

Your friend's correct.
This guy... could have achieved the same thing (supercharging) with 4 large turbos. A Dumbass with money.