Why do diesel engines have more torque than gasoline engines?
Why do diesel engines have more torque than gasoline engines?
(OP)
...and why do gasoline engines usually have more horsepower than diesels?
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Why do diesel engines have more torque than gasoline engines?
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Why do diesel engines have more torque than gasoline engines?Why do diesel engines have more torque than gasoline engines?(OP)
...and why do gasoline engines usually have more horsepower than diesels?
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RE: Why do diesel engines have more torque than gasoline engines?
Check them out and see if they help.
Rod
RE: Why do diesel engines have more torque than gasoline engines?
Torque comes from burning more fuel during each power stroke or engine cycle. The limit on fuel is related to how much air can be induced into the cylinder for each engine cycle. How do I get more air... Turbo charge or super charge. Most diesels are turbo charged so they have more torque. Gasoline engines are limited with turbo charging because of knock.
Power comes from torque times engine speed. If you can rev an engine faster, you can typically get more power. But running higher engine speeds leaves less time for complete combustion. SI engines can rev higher than diesels because of the combustion is faster, due to two reasons. First, ignition with a spark is quicker than ignition by compression. Second, SI engines run premixed air/fuel charges that burn fast. This is compared to CI engines where mixing occurs during combustion, significantly slowing the combustion process.
RE: Why do diesel engines have more torque than gasoline engines?
RE: Why do diesel engines have more torque than gasoline engines?
500 ci SI engine---90+ percent nitromethane fuel---5000+hp @ 8500 rpm and they burn 3 to 5 gallons in FIVE+/- SECONDS!
Not too many dyno's around capable of testing these engines and fewer people willing to use up a $100K engine just to see what they will do.
I am not a drag racer (since my 20's) and I don't know too much about these newer Hemis, but I am overwhelmed by their ability to turn in the seemingly impossible performances they do.
Rod
RE: Why do diesel engines have more torque than gasoline engines?
I know what you mean. E.T. and top speeds thought unattainable 20 years ago are now posted at every meet. However, what is even more amazing is the use of 4 or 5 of these engines on one tractor in tractor pulling events. Talk about excess!
RE: Why do diesel engines have more torque than gasoline engines?
-=Whittey=-
RE: Why do diesel engines have more torque than gasoline engines?
RE: Why do diesel engines have more torque than gasoline engines?
Then again, how much load is the engine recieving when it's spinning that fast? The tires on a tractor puller are shaved so they don't get too much grip, but i'm sure there is still a large load. But is that large load large compared to a grippy 12" slick on a sticky track? Sure there isn't as much weight being tossed around, but that can all be made up with acceleration.
-=Whittey=-