F12 phantom braking sucks. is there a way to turn it off? | FerrariChat

F12 phantom braking sucks. is there a way to turn it off?

Discussion in 'F12/812' started by sunghyun7, Feb 14, 2022.

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  1. sunghyun7

    sunghyun7 Formula Junior

    Oct 7, 2019
    256
    I always thought F12 had fantastic engine braking b/c it would slow me down from freeway speeds to a stop without really hitting the brakes. I figured v12 has a lot of drag. but I realized F12 actually pumps up brake pressure with a motor artificially to make braking "feel" lot more solid when you hit the brakes.

    Can I turn this off?? I mean this is great on a track but my car never sees a track, and it probably never will. That artificial brake booster motor is supposed to get the pads close to the rotor without touching, but they definitely make contact.

    Try this: at highway/freeway speeds, take foot off gas pedal, put the car in neutral, and coast. You'll feel the car slowing down. Hit the gas pedal (while in neutral), and you'll feel the car coasting like any other car. For a street driven car, this kills mpg and adds drag to CCB for no reason. I love the solid braking feel, but it's too touchy for me anyway. I would like to disconnect the motor but am worried about unforeseen consequences. Has anyone try to turn off this motor?
     
    ANOpax likes this.
  2. 350MH83

    350MH83 Formula 3

    Jul 11, 2014
    1,180
    Denmark
    Full Name:
    Max
    I would imagine that this motor is the same than the ABS pump... In which case I doubt there is anything you can do about it.
     
  3. ANOpax

    ANOpax Formula 3

    Jul 1, 2015
    1,358
    The Netherlands
    I had no idea that the cars were doing this. I’ll try this in the FF next time I’m out but I suspect it has the same system as I thought that the car had great ‘engine braking’. Little did I realise that it’s a brake ‘prep’ system.
     
  4. obar

    obar Karting

    Oct 28, 2007
    61
    LOS ANGELES
    Full Name:
    Oscar
    Now, this makes a whole lot of sense. I've noticed that when driving the Lusso in Sport, as I lift the accelerator, there's a not-so-smooth engine braking happening. Been wondering why and guess this is it.

    Thinking that with some practice, the ride can be made just as smooth as if the engine braking wasn't happening at all. Guess I'll have to for another drive today ;)
     
  5. Caeruleus11

    Caeruleus11 F1 World Champ
    Rossa Subscribed

    Jun 11, 2013
    11,620
    Obar, I believe that is just due to the high compression engine. If smooth driving when you are in traffic etc- use manual shifting and keep the RPMs around 2,000 and you will see when you take your foot away from the throttle theres not too much compression. However, dont lug the engine up a hill with so little revs. Depending on the elevation you'll want to be at 3,000 or a touch more, then coming down the hill you can upshift and bring the RPMs down. Also use the comfort mode as this has a smoother throttle map.

    As to what the OP called Phantom braking- I wonder if this is just the edgy/ grabby feel of the carbon brakes from this generation of cars. They can be a little bit grabby at the first bit of brake pedal pressure. A way to help this is to bed in the brakes- you can look up the procedure- or just take it for a track day. After doing this with my F12 and the 599 before it, the brakes were a lot more linear in their feel and application.
     
  6. blkfxstc

    blkfxstc Formula Junior
    Silver Subscribed

    Nov 30, 2016
    873
    TX
    Full Name:
    Eric
    It also has a light flywheel, thus little stored rotational energy when coasting to a stop, causing it to slow quicker than other vehicles that have a heavier flywheel. Combine this with a large tire footprint and aero drag, thus the results you are seeing. I did the same thing when driving mine yesterday, observed the same result, so I had the last day to think about the reasons. You hitting the gas pedal while in neutral just added to the stored rotational energy of the flywheel, thus the better result after.
     
    Caeruleus11 likes this.
  7. sunghyun7

    sunghyun7 Formula Junior

    Oct 7, 2019
    256
    yes indeed. looks like that's the same motor. Intervention then has to be on the software side. I guess I'm SOL.

    no. take the car to 70mph (or any speed really), take foot off gas, pull both paddles to put the car in neutral, you'll feel the car riding on the brake. you can get the car to stop riding on the brake and coast normally if you blip the throttle while still in neutral.

    no sorry. this isn't lightweight flywheels, aero, or wheels. the car starts riding on the brake rotors without your foot touching your brakes when you take your foot off the gas. follow my procedure as described above. you'll feel what i'm talking about.
     
  8. Enzo Belair

    Enzo Belair Formula 3
    Silver Subscribed

    Jul 27, 2004
    1,591
    Texas
    Full Name:
    Scott
    Guys its a racing/lap time attribute to the car. If you would have sat through a presentation from Ferrari (which I have done) during the launch of a car when they started implementing this feature, like the 458 or F12, you would have been presented their thinking. They are "pre-loading" the brakes the moment you take your foot off the accelerator under the heading of, if you are not accelerating, you must want to decelerate. The pre-loading helps with faster lap times as deceleration is just as important as acceleration when racing.

    I do not like the feel during city driving and the feature should only be on when you have the car in Race or above. Its annoying as all get out when driving on city roads, especially in traffic, the car just will not coast, and your head just bobs back and forth, even worse for the passenger, my wife gets car sick in traffic.

    This is where Ferrari is to focused on race and not on everyday use, a simple application on race or above would give you the best of both worlds, especially in a GT car.

    Unfortunately the feature cannot be "turned off".
     
    Bundy, Vegas CS, Loxo and 3 others like this.
  9. sunghyun7

    sunghyun7 Formula Junior

    Oct 7, 2019
    256
    yes, I agree the feature should only be on with race or ct off. really should be an option we can toggle on menu window. when I first felt it, i thought it was my parking brake drum shoes binding. I looked at it, and they looked perfectly fine. then I learned about this "feature". I don't like the idea of using that brushed ABS motor every 10seconds... it'll fail someday.. probably will need a whole new unit when they are out of production, probably will need to be reprogrammed by the dealer specific to each VIN..
     
    Caeruleus11 likes this.
  10. obar

    obar Karting

    Oct 28, 2007
    61
    LOS ANGELES
    Full Name:
    Oscar
    Enzo Belair and Caeruleus11 like this.
  11. sunghyun7

    sunghyun7 Formula Junior

    Oct 7, 2019
    256
    #11 sunghyun7, Feb 20, 2022
    Last edited: Feb 20, 2022
    I think when I have the cruise control on, the brake riding feature turns off. The car seems to coast normally. I'm just talking about having cruise control "ready" on, not necessarily maintaining speed. now I couldn't replicate it riding the brake again when I turned it off. I was in moderate traffic all day, so I couldn't really test out my theory in full. I think it definitely coasted normally without riding the brake with cruise control on in the background. I could also tell by braking feel. It felt somewhat like a normal boosted brake, not a hard wall.
     
    adslm22 likes this.
  12. [gTr]

    [gTr] Formula 3

    Mar 11, 2008
    1,048
    Hamburg, Germany
    As long as its not a warranty issue, I believe @360trev can probably reprogram it to work exactly how you want it to :). The man is an ECU/TCU legend.
     

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