but i think you can still rev to red line in P400 mode, and if throttle butterflies is the only difference, you should still be getting 507bhp at 7725rpm. on that basis, i think there's more to P400 than throttle butterfly.SoulBladeZA said:It stays the same. As far as I know the only difference between P400 and P500 is that the throttle butterflies (I think) are only open at 90% intsead of 100% for P500.
I don't think You are right on this one. If for example, You would have that piece of wood under the accelerator pedal the engine would not reach that high rpm's anymore.bernhtp said:All of the information posted thus far indicates that P400 has the single function of limiting how far the throttle may open, and thus it has the same effect as a block of wood placed under the accelerator peddle with the same consequences on torque, power and fuel economy.
Engines easily reach their full RPMs at 75% throttle. More throttle means more torque at any engine speed, especially at higher RPMs where the extra fuel/air can be more effectively used.BradM5 said:I don't think You are right on this one. If for example, You would have that piece of wood under the accelerator pedal the engine would not reach that high rpm's anymore.