you can add a throttle body spacer, add a msd kit and platinum spark plugs and wires, cold air intake, you could gain about 15-20 more hp.
without swaping heads or getting head work done your looking at approximatly 400 hp depending on the cam and intake and carb match.
Impossible to answer without knowing the make, model, and year.
A throttle body can be cleaned without removal. Several spray cleaners for throttle bodies are available at your local auto parts.
Yes, the pistonless rotary Wankel engine.
Seriously, don't mess with the cam that much unless you only plan to race it. Mild compression increase in the pistons and an RV cam will give you some decent improvement, and an exhaust header will also help.
The horsepower refers to the measure of an engine's power without any loss caused by the gearbox or generator.
Advertised Horsepower is: 230 HP @ 3800 RPMs.
Turns out the problem was never the throttle, it was an experimental in-line fuse that went out.
no *Correction - Reduced back pressure does usually result in more horsepower. Some cars run with resonators rather than mufflers which reduces the noise without as much back pressure, thereby increasing horsepower.
An engines cubic capacity cannot be converted, mathematically, to horsepower without a host of other information..
stuck throttle butterfly plate