Does anyone know where I can find curves of horsepower and/or torque as a function of engine rpm for various throttle positions for my 2000 Honda Civic engine?

 

no way to tell, all engines are different.

 

Try this site... mostly for Integras but I think I remember seeing some other stuff on there too.

http://www.geocities.com/dynocenter/home.html

It doesn't matter what you see there though, your car will most likely be different.

 

You're likely to only find WOT curves anywhere public. For part throttle data you'll have to be in contact with Honda engineers or someone who does relatively serious emissions testing/verification with a load-bearind dyno. If you call around local shops ask if they have a Mustang or Dynapac dyno (or any other load bearing one for that matter). Rates are usually near $100/hr or so to make them yourself.

Try a search on this site, wot dyno plots are posted fairly often. Depending on how sophisticated/accurate you want to be, you can figure out the choke point of the throttle at various percentages, and the airflow vs rpm based on the VE of the engine, to extrapolate the partial throttle curves from WOT. Basically they'll ramp up about the same until you near the throttle limitation, then run flat out to redline.

Good luck.