f1eng
Well-Known Member
- First Name
- Frank
- Joined
- Aug 19, 2021
- Threads
- 48
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- 4,765
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- 8,335
- Location
- Oxfordshire, UK
- Vehicles
- Taycan CT4S, Ferrari 355, Merc 500E, Prius PHV
- Thread starter
- #1
It seems almost like trolling but I have been surprised that some members have talked about the power delivery of their IC engined sports cars in glowing terms, as if their characteristics, which are objectively inferior, were, to them, subjectively superior.
The reason IC engines are very limited is to do with getting oxygen through them. No point in putting fuel in unless there is Oxygen to burn it so really and IC engine is all about how much air you can get through it.
With NA engines we have a balance between wide power band and less power with high peak power over a narrower band. This is entirely due to the physics of the gas flow through the engine and optimising valve overlap, valve timing and tuning inlet and exhaust manifold lengths to use resonance.
This inevitably means that a sporty engine starts off with low power, increases rapidly to a peak where the valve timing and manifold resonance come together then runs out of revs leading to the typical acceleration surges in each gear.
Given an electric motor has none of these major limitations it I wonder if some may like to have a setting emulating this characteristic. I am not sure how easy to programme but I am sure some simulated gearshift torque drops and power build up would be possible and a sport sound to go with it to make it sound like a classic too.
It would be obviously be slower, because it is with same power IC engined cars, because they only have that power briefly in each gear, rather than as long as the temperature is OK, but it would allow a characteristic which some seem to really like.
The reason IC engines are very limited is to do with getting oxygen through them. No point in putting fuel in unless there is Oxygen to burn it so really and IC engine is all about how much air you can get through it.
With NA engines we have a balance between wide power band and less power with high peak power over a narrower band. This is entirely due to the physics of the gas flow through the engine and optimising valve overlap, valve timing and tuning inlet and exhaust manifold lengths to use resonance.
This inevitably means that a sporty engine starts off with low power, increases rapidly to a peak where the valve timing and manifold resonance come together then runs out of revs leading to the typical acceleration surges in each gear.
Given an electric motor has none of these major limitations it I wonder if some may like to have a setting emulating this characteristic. I am not sure how easy to programme but I am sure some simulated gearshift torque drops and power build up would be possible and a sport sound to go with it to make it sound like a classic too.
It would be obviously be slower, because it is with same power IC engined cars, because they only have that power briefly in each gear, rather than as long as the temperature is OK, but it would allow a characteristic which some seem to really like.
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