I have so many questions it hurts...
How can somebody "feel" a "constant torque curve" ???
You don't feel torque you feel the power of the engine accelerating the vehicle right?`
Also I am sure that when people say they want more torque they actually mean to say that they want more low rpm power... so far I haven't been proved wrong in this assumption.... yet...
Next how can the revetec engine produce more torque when running on a lean mixture?
In order for your claims to be true you would have to maintain the same torque at 2000 and 4000rpm but you are saying that you are running on a leaner mixture during 4000rpm operation... How is this possible? I know you are getting "almost" complete combustion (you should be able to get practically complete combustion on lean mix) But if there is less fuel in the chamber then less torque is produced... Max torque is produced with a slightly rich mixture.... Please explain yourself.
I don't understand what you are saying about your lambda readings.... I believe the oxygen sensors measure the amount of oxygen in the exhaust right? well then if the air/fuel ratio is lean for the whole cylinder then the lambda reading would show that. Just because you burn all of the fuel that you do inject doesn't mean that you would get a reading showing 14.7:1... Lambda readings tell you the air/fuel ratio of the whole cylinder (and engine) so running lean and igniting it by concentrating the fuel around the spark plug shouldn't fool the system should it?
I would also like to point out that a slightly more accurate rule of thumb is 3/10 of the burned fuel's energy is produced as output power as motive force to the wheels. 2/10 is lost through the cooling system. This includes the power needed to pump coolant around the system as well as the actual heat energy dissipated by the system. Keep in mind that on an engine producing 150kW motive power, 100kW of energy is lost throught the cooling system. 4/10 is lost as heat and kinetic energy in the exhaust. Exhaust can be as much as 1000 degrees C and is normally over 800 degrees C for normal cars. 1/10 of the burned fuel's energy is lost through heat that doesn't go through the cooling system.
Power, whether measured as HP, PS, or KW is what accelerates cars and gets it up to top speed. Power also determines how far you take a wall when you hit it
Engine torque is an illusion.