Why do higher displacment Dohc Vtec engines have less hp/L then those w/ less disp.?

[Ekliptix]

1.6L = 100hp/L
1.8L = 0.94hp/L
2.2L = 0.91hp/L

??
I'm just curious about these engines, not other honda ones.

[legendboy]

More torque!

[Ekliptix]

right, so they have equivilant area under the curve/L?

[GTS Jeff]

just the way theyre tuned. they COULD be tuned for more hp but its less streetable

[2M6]

Don't forget S2000

2.0=120hp/Liter

[2M6]

I'm just curious about these engines, not other honda ones.

^^^sorry, missed that the first time.

[GTS Jeff]

but specifically, WHICH 1.6, 1.8, and 2.2 is joo referring to?

[RiCE-DaDDy]

i think it goes, higher the displacement, bigger the engine (obviously), harder to produce power, becomes less streetable as jeff said, more expensive to achieve same results etc. I mean look at motorcycle engines, 600cc = 100hp

[syeve]

the only b16 that makes 100 hp/litre is the b16, which is a very good motor but has no (and I mean no) torque. Like jeff said, thats the way honda tuned them...price, streetability, usable hp range. (s2000 is pushing the limits of useable HP range in my opinion)

[ninspeed]

The lost hp is made up in tourqe. Usually the higher displacement engines have a lower red line, and steeper rod angle, a little more loss in power up high, so not as high HP. I read a really good thread on another board that went deep in to detail on this.. cant rember if it was a honda, or dsm fourm.. Ill go look tonight and see if i can find it again.

[Ekliptix]

Here;s some stuff ppl said:

Cost is the main issue. The bigger the engine, the higher it cost for it to stay at high rpm and make power. Design and material.
But when cost is not a factor.. just look at v8 ferrari engines.


Technically, because inertial loads increase at the square of RPM's.


I think the B16 is an oversquare engine(bore > stroke). This lets it rev more, and produce more power at those higher speeds.

The B18 is basically a stroked B16. It can't rev quite as much. Low end torque is probably a bit better because of the extra stroke, but the B18 can't rev enough to make up the difference.

The H22...I'm not sure about the bore vs. stroke. However, I do know that it can't rev quite as high as the other two engines. I think redline is 'only' about 7800rpm. So the H22 is the low end power king, and has a pretty good peak figure, in the 160lb-ft range. However, when you compare specific outputs(hp/liter), the H22 doesn't measure up, just because it couldn't make more power in proportion to it's size.