Does torque at RPM matter at less than WFO?

[Kurlon]

Oh, flame me if you must, but what the fuck is
WFO?
Is it the same as WOT?

Wide Full Open, so yeah, same as WOT. Mashed pedal. Matted. Giving it some 'shoe'. Hammer down. To the stop. Pinned. Etc...

[Honclfibr]

Huh. I always thought it was Wide Fucking Open. You learn something new every day.

[Kurlon]

Heh, I was using the polite version. Yours is what I think of in my head. : )

[taxonomy]

You are insane.

Torque is the ability to do work over time. More torque, less time required to accomplish the work. WFO has nothing to do with it. And CB1s are gay.

Throttle position, and hence the amount of air entering the combustion chamber before the vents close would have something to do with it. BMEP

Torque is a function of BMEP

[Honclfibr]

STFU Captain Acronym

[Kurlon]

Throttle position, and hence the amount of air entering the combustion chamber before the vents close would have something to do with it. BMEP

Torque is a function of BMEP

Yes, and that air flow is determined in part by the exhaust system, intake design, air filter, etc. Changes that impact full throttle operation can and do also impact flow at partial throttle, which means...

...wait for it...

...these changes can have benefits when riding at partial throttle! Improving flow at partial throttle can lead to improved throttle response as the carb is now working with a stronger signal. You'll have more energy to induce swirl as the charge enters the cylinder, etc.

Just for reference, since you brought up BMEP, some of us do take motor theory too seriously. I myself am writing my own motor sim for example: http://www.x386.net/TTR/tech/cgi-bin/motorsim.cgi

[taxonomy]

...wait for it...

...these changes can have benefits when riding at partial throttle! Improving flow at partial throttle can lead to improved throttle response as the carb is now working with a stronger signal. You'll have more energy to induce swirl as the charge enters the cylinder, etc. [/url]

Awesome. The answer I was looking for. This "signal" aspect was what was lurking in the background for me. Correct answers seem obvious when you recognize them.

Just to clarify, there is reduced torque at reduced throttle opening, all things being equal. There is also quicker response to changes in throttle position with a pipe. This is mostly due to a better signal to noise ratio.

The increased response to changes in throttle position is much of what people perceive as "more power" at partial throttle openings. To be sure there could be more power at any given throttle opening with a pipe but probably not much.

I think people focus on HP/torque gains because this increased response in hard to quantify.

Nice sim.

Thanks

Adam

[taxonomy]

STFU Captain Acronym

I guess and engine is like a magic box where daemons make the bike go when you turn the rubber thingy.

A~