torque.....what the...?

[wallaka]

I get 81524.17 ft lbs. Not too shabby.

 

[mutt]

jeez, a guy akses a simple question & opens a size large can o worms....& I was just wonderin if a chrome muffler would make more torque or more horsepower....

 

[StrangeRanger]

That's EASY:
A nickel plated muffler increases torque
A chrome plated muffler increases horsepower.
Don't you read any tuner magazines?

 

[Platinum_Racing]

Horsepower is an equation of torque.

HP = Torque X RPM / 5252

That is the formula. I learned it a while ago and it's very useful for making calculations in your head.

You can also use it backwards to find the amount of torque.

Torque = HP / RPM X 5252



You guys ever wonder why torque and HP curves generally come closer to each other around 5,200 RPM?

 

[jamyers]

That's EASY:
A nickel plated muffler increases torque
A chrome plated muffler increases horsepower.
Don't you read any tuner magazines?

Dude, that's only true with stainless steel tailpipes. Or if you've got a 1/2" fuel line.

 

[Platinum_Racing]

Torque anybody? Here is some torque.

Here is an old bessemer cooper diesel that turns a backup generator at one of the hospital energy plants I work at.
6209 bhp at 400rpm.
Anybody know the math to get the torque rating?
Also neat: 15.5 in bor X 22 in stroke X 20 cyls.
doesn't that net about 83,000 CID?
I'd hate to pay for an oil change.

http://s94.photobucket.com/albums/l120/ ... engine.jpg

http://s94.photobucket.com/albums/l120/ ... ooper2.jpg

That engine is exactly 81524.17 ft lbs horsepower at 400 RPM.

 

[jamyers]

jeez, a guy akses a simple question & opens a size large can o worms....& I was just wonderin if a chrome muffler would make more torque or more horsepower....

For even more fun, ask some train guys about how much horsepower a locomotive has.

Here are some more fun things to consider...
The Electro-Motive 20-710G 2-cycle turbo-diesel has 20 cylinders each displacing 710 cubic inches, and makes
4150 hp @ 750 rpm,
4400 hp @ 800 rpm,
5000 hp @ 900 rpm (redline is 904 rpm).
It's turbocharger is geared with an override clutch, so at low speeds it's a supercharger, and at higher speeds it's a turbocharger.
Its piston pin is 6.5 inches in diameter, and a main bearing is 8.5 inches.
Oh, and 30,000 hours between overhauls (assuming operating at 80-90% load almost all the time.)

 

[wallaka]

Torque anybody? Here is some torque.

Here is an old bessemer cooper diesel that turns a backup generator at one of the hospital energy plants I work at.
6209 bhp at 400rpm.
Anybody know the math to get the torque rating?
Also neat: 15.5 in bor X 22 in stroke X 20 cyls.
doesn't that net about 83,000 CID?
I'd hate to pay for an oil change.

http://s94.photobucket.com/albums/l120/ ... engine.jpg

http://s94.photobucket.com/albums/l120/ ... ooper2.jpg

That engine is exactly 472.8865 horsepower at 400 RPM.

I calculated the torque to be 81524.17 ft lbs. from the supplied horsepower figure. I think you got the conversion backwards.

 

[Platinum_Racing]

That's funny, I think I just put it down because I forgot it was such a huge engine. I got the equation correct in the first post, but for some reason I did it wrong anyway. Go figure.

Here are some more fun things to consider...
The Electro-Motive 20-710G 2-cycle turbo-diesel has 20 cylinders each displacing 710 cubic inches, and makes
4150 hp @ 750 rpm,
4400 hp @ 800 rpm,
5000 hp @ 900 rpm (redline is 904 rpm).

And the first gen Cummins came with between 160 and 235 HP.

 

[boston774]

Locos usually get measured in terms of tractive effort. Looking at this and adhesion factors will tell an engineer how much tonnage a train can pull for a given terrain.

Plus the new 3-phase AC motors on trains can take a -lot- more abuse than the DC motors. A truly impressive sight was a video of three EMD SD-70MACs taking an 18,000 ton unit coal train up an incline - 13,000+ hp and 600,000lb of tractive effort. Would not want to be near a coupler that let go!

Lots of very interesting advances in railroads right now...