Ferrari LaFerrari vs Mclaren P1 vs Porsche 918

Do you really think it was going to cost them much to opt for brake-regen? If they wanted to go the "cheap" way, they wouldn't have developed their own e-motor.

 

I'm sure MSO will provide them with all the equipment?

Exactly.

 

Yes, for sure. As well as achieving the other 7 (seven) parameters, which you forgot to read...

 

The drs should be automatic and not operated by a button. And initially the other button was to be called kers.

 

This is NOT KERS This is petrol generating electric energy no different than a diesel electric bus.

 

exactly

 

Here's how Mclaren may have implemented its KERS in simplified description:

The "disengaging" happens electrically at the MGU, quite easily implemented. Imagine the P1 driver full on the gas - MGU is now in motor mode - the rotor being driven hard by the stator, which is drawing power from the battery. The driver lifts off the gas - the MGU switches to generator mode - the rotor's field coils cutting thru the stator's magnet fields, generating electricity (which flows back to the battery) AND a braking effect to the rotor (and thus a braking effect to the engine as well).

The driver steps on the brakes - since Mclaren doesn't want MGU braking to "adulterate" the disc brakes' feel - a simple current cut off (disengagement) at the stator stops the power generation and the unwanted (in McLaren's case) braking effect.

 

^ if it makes you feel better ...

 

I.e., "coasting only" KERS, plus ICE as generator power when not using battery power for acceleration.

 

I believe off throttle it converts the vehicle's kinetic energy into battery power by imposing negative torque on the crank. It's connected directly to the crank, which is connected to the transmission, wheels, etc.. The fact that it can also use engine power to generate charge does not negate the fact that it can function as a kinetic recovery system.

If there is someone here who has learned straight from McLaren something otherwise, by all means impart us with your knowledge, but so far everything that has been said lately has been pure speculation.

 

Wow, some folks here are Stubborn (or just plain confused, shilling)!!!!!!!!!!!!!!!!!!!!.......LOL

Flat Earth anyone!???????????

 

Indeed!

 

Isn't this supposed to be a Ferrari oriented forum? Why is the LaFerrari hardly mentioned at all here?

 

true

Not really, p1 offers 903 HP full time without depleting battery power. 918 offers full power only when you press that red button "hl mode", which depletes all battery power. That is gimmicky to me.

The buttons in the steering wheel add to the driving experience, they give you the option of deciding when to use boost or reduce the drag. Not anybody would want to learn a new track with 900+ HP, you can tune it down to 720 engine only and have the boost control at a push of a button.

Putting more control within the reach of the driver is never a bad thing.

 

Is that really true? If so, seems like that is the final nail in the coffin of the "all day" "lap after lap" claims for the 918.

Edit: yeah it looks like that is true. From Porsche's own release: http://press.porsche.com/news/release.php?id=787

"The “Hot Lap" button in the middle of the map switch releases the final reserves of the 918 Spyder and can only be activated in “Race Hybrid" mode. Similar to a qualification mode, this pushes the traction battery to its maximum power output limits for a few fast laps. This mode uses all of the available energy in the battery. "

 

And to go in a totally different direction away from the kers debate, is it possible mclaren is also going to build more then the advertised 375 cap? It seems one of our favorite djs just placed his order for a p1 and it will arrive in march.

 

Isn't it more likely that he paid more then msrp for someone's build spot.

 

Sorry if this is a repost, but I thought the end of this (brief) article summed up two of these cars well:
"Both the 918 Spyder and P1 have their place and purpose and, contrary to general belief, they complement (rather than cannibalise) each other. Should we desire both of them? Yes. Can we pass them on to the next generation without feeling embarrassed? Yes again."

Hypercar showdown: McLaren P1 vs Porsche 918 | Classic Driver Magazine

 

Yup, its "ok" in the other modes nothing special

 

Nope, P1 offers 903HP in selected scenario. Not all the time.

Without engaging Hot Lap mode, in Race mode the 918 operate exactly the same as the P1, where in certain scenarios the whole allocation of HP is being put down to the ground with the added benefit of regen charging to charge the battery faster.

Efficiency is good, the fuel saved by not using the engine as the charger might not seem much at first, but it all adds up and say if it amounts to a pit stop or 2 over a 24hr race, that could mean finish 1st or not.

 

well this looks fast

https://www.youtube.com/watch?v=azVY5WvRaS4

 

I don't know where your getting your wrong info from

Lets be clear about this, p1 offers 900+ HP in ALL modes. The only time it operates at 720 is when the boost button is pressed.

918 operates at full power only with the red button. And that depletes the battery.

 

indeed it is fast

 

Hmm, have you seem the cutaway diagram of the P1? It's motor is not connected directly to the crank. The motor is in the alternator spot and interfaced with the drivetrain just like the alternator, via the flywheel. And Since the LaFerrari has the motor hanging off the back of the gearbox, only the 918 has the motor connected directly to the crank, inline with everything else.

 

You might want to double check with your sources then. Fanboy-ism can only go so far, sooner or later you have to back up what's written.

Right off the top I can call your bluff already with a royal flush. In e-mode the P1 only puts down 176HP, didn't know McLaren just reworked their e-motor to generate 903HP, must have missed that press release.

Race mode in 918 is exactly the same as in P1, where all HP is available and the ECU decides when to use engine power to charge. Hot Lap mode simply take the engine charging part off the table and purely charges the battery by regen braking.

Sports mode in the 918 means the car is pretty much runs on engine power, with the e-motor acting like a nitrous shot whenever the ECU see fits for performance.

Hybrid mode the car will operate on either gas power or electric power or a combination of both, the ECU will decide what works best for efficiency sack.

E-mode means the 918 will only run on 279HP from the e-motors only, unless the driver puts his foot down and trigger the gas motor, once the foot is lifted off, the engine shuts off again.