theJunkman:
That’s the great thing about a dual-fuel car, you run low on CNG you just change back over to gas.
90RioGS:
It may lack horsepower, but it makes up for it with gobs of torque. And torque is what makes cars accelerate.
-P
That’s wrong. Torque climbs hills. Horsepower accelerates. Did you miss my example with the diesel civic? Tons of torque, and no power. Ridiculous 0-60 times.
Wrong. How fast a car accelerates depends exclusively on torque. Any car accelerates in any gear just as hard as the torque curve dictates. At the torque peak the car will accelerate most, at higher and lower rpm less.
Horsepower is more or less an expression of the rate at which torque is produced.
-P
what desiel revs to 6000? not too many. most high hp ones make their power before 3500.
Does anybody else remember that link a while back on horsepower vs torque in race cars? There was this huge page with all the math that proved that acceleration is dependent on horsepower and not on torque. I can’t remember if it was posted here or on another forum.
To some of us the glass is half full. The rest of us are wondering “Who the hell drank half my glass of water?”
or in this case my half glass of diesel 
horsepower is a function of torque. one isnt better than the other. say if you have a flat torque curve of 100ft-lb that goes on forever; as rpms increase to infinity, hp will increase to infinity. now when the torque begins to fall off, so can the hp, despite increasing rpms. this would be based on the slope of the decreasing torque.
What is power, exactly, and how do Hondas make it?
Warning: Once you see this, you will never look at horsepower and torque readings the same again, especially after you think about it.
P= (TR)/5252
P= power, in horsepower
T= torque, measured in lb/ft
R= Engine speed, in RPMs
Therefore:
Horsepower= (torque x RPMs) / 5252
Try it- pull out a dyno and see what you get.
So from this, we can conclude that if we increase torque or engine speed, we will get more power, right?
hell, maybe even a twin turbo design. I saw it somewhere, where somebody put a little turbo and a big turbo together, where the little turbo was for -3400 rpm’s and the highe turbo best for +4200 rpm’s.
OR (Px5252)\R=T
So same equation what do you get?
increase rpm lose torque?
increase HP gain torque?
How bout (P*5252)\T=R
increase Torque and lose HP?
or increase P and RPM goes up?
You get HP by increasing torque. So by increasing torque by any measurable amount, you gain HP.
The torque curve dictates where you make power.
-P
Repeat after me. “It is better to make torque at high rpm than at low rpm, because you can take advantage of gearing.”
wow, he wrote that whole thing just to say that?
And I’m not sure if modern diesels are running 20:1 compression, but I know 18:1 or so is common. imagine the forces involved in compressing air that much while spinning 6000-9000 rpm.:shock:
I think thats call sequential?
im not a huge turbo guy - so im not 100% sure?
neat concept though.
The twin-turbo supras were sequentially turbocharged, weren’t they? Don’t know if they used different sized turbos though - I think only one ran at lower RPM and both at higher.
Oh, The honda Desil motor was a 2.3L / 21.8:1 comp ratio that makes 250 ft-lbs of tq and 150hp @ 3750. That was no turbo, not think if it had a turbo.
Sorry to burst your bubble, but you need to consider more things from what you’re listing.
Oz
Maybe a little bit smaller cams (piston / valve clearence), and sleeve he block.
I’m pretty sure any modern diesel engine is turboed.