Left Foot Braking for FWD Vehicles

Discussion in 'Autocross/Road Racing' started by Bud, Dec 30, 2007.

  1. Bud

    Bud GG EVO IX MR

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    Left-foot Braking - TARMAC

    Left-foot braking is primarily used in front-wheel-drive cars and comes in handy during cornering at high speeds.

    A severe problem affecting most front-drivers is understeer during fast cornering. Understeer generally means that during cornering at a high speed, the car has a tendency to keep moving straight and to the outer edge of the curving road rather than the direction in which you are pointing the car. To cancel out understeer, there should be more grip at the front wheels than at the rear. The left-foot braking technique more or less helps you to do just that.

    When approaching a corner, you should start slowing down like you normally do, using your right foot to apply the brake. At this point, you can use the heel-and-toe maneuver and downshift to the proper gear. Now, you should move your right foot over to the accelerator and your left foot to the brake at the same time. You are now ready to perform left-foot braking. Continue slowing the car down to a reasonable - but not too low - speed by applying the brakes with your left foot. As you are about to turn into the corner, hit the gas with your right foot and keep braking with your left foot at the same time. Being a front-wheel-drive, the rear wheels will lock while the front wheels keep moving. The car's weight is transferred to the front, causing the front wheels to have more grip than the rear wheels. The car now starts to oversteer.

    Now you have to keep the car in control by steering in the direction that you want to go, and applying more or less throttle and braking as needed. You have to use both your pedals at the same time, which will take practice. Lifting off the accelerator will cause more oversteer and flip out the car's rear even more. Applying more throttle while easing off the brakes will reduce oversteer and straighten out the car. Keep performing this balancing act to smoothly clear the corner at high speed, all the while making little corrections to your steering. At the end of the corner, just floor it and power out.

    When you get good at this technique, you should be able to just keep the accelerator completely floored and keep the car moving in your preffered direction using just your brake pedal and steering wheel. Understeer is eliminated if done correctly and you clear the corner at a higher speed than in normal driving. The trick is to keep practicing braking with the left foot and learn to apply the brakes as well with the left foot as with the right.

    With a typical race-car gearbox, you can even start your initial braking with your left foot instead of your right without having to use the clutch pedal. When braking, you can blip the throttle between the gear change. Most normal gearboxes cannot cope with such abuse and so it is generally better not to even think about trying such a move with your commuter car unless you have deep pockets to foot the resulting repair bill! Also keep in mind that many upmarket cars are equipped with computer-controlled stability systems that will help you to safely keep a car in control during high speed cornering. But with practice, you can control a car better with the stability system turned off and turn at an even higher speed.

    Modernracer.com © 2003

    http://youtube.com/watch?v=_HjXXUyQhPE&feature=related
     
    Last edited: Sep 8, 2008
  2. MotherMopar

    MotherMopar The One, The Only... MOMO

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    This should also be posted in the SRT4 section, bro. I remember when John, my neighbor, had his skittle... he'd talk about the understeer.
     
  3. Bud

    Bud GG EVO IX MR

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    I was going to put it there but decided only folks really interested in racing will use LFB....even though for everyday driving it reduces the braking time by three-tenths of a second, which means that a car doing 30 m.p.h. will stop 13 ft. sooner!
     
  4. LegMaker

    LegMaker LMI - LegMakerIntakes

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    great write up rick!!! i remember being taught this many years ago...... i have not done it in decades becasue i have not had any front drivers to practice on!!! hahahaha
     
  5. Bud

    Bud GG EVO IX MR

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    A left foot braking video highlight....AWD.
    [media]http://youtube.com/watch?v=pBve_QTLh34[/media]
     
  6. LegMaker

    LegMaker LMI - LegMakerIntakes

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    damn rick, that last vid has the guy initiating the turn/slide weeeeeell before the actual turn!!!! man, what a blast to have the skill, not to mention, courage to do that!!!
     
  7. nevinsrt

    nevinsrt Getaway driver for hire

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    Thanks for finding again Rick
    I had this on my Computer back when i was still in the Marines and forgot to grab it wen i left.


    this is a great method for those tight corners, or if you need to shift the cars weight before the corner
     
  8. ABMResto

    ABMResto Muscle Car Rx

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    Hey guys, i'm new around here, you'll be seeing me hangin' around in this forum.
    I ran Road Atlanta in my PT this past spring and did the LFB thing. (long before reading this) I worked very well. I also LFB when autocrossing a high horsepower RWD car... Riding the brake a little to help counteract wheelspin(kinda like having "ass sensitive" traction control.
     
  9. Quick

    Quick Mgmt. - I can't help you

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    This might explain how you broke the back end of that ford focus...
     
  10. Bud

    Bud GG EVO IX MR

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    Pretty much!
     
  11. nevinsrt

    nevinsrt Getaway driver for hire

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    hahahaha
    Welcome! im sure you can pass on some knowledge to others just starting out.

    I too Left foot brake RWD my mustang has no E-brake :grin:
     
  12. nevinsrt

    nevinsrt Getaway driver for hire

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    baby got no back :grin:
     
  13. Bud

    Bud GG EVO IX MR

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    Bump for the meats!

     
  14. nevinsrt

    nevinsrt Getaway driver for hire

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    I went off roading again this weekend and i had gotten a little rusty at LFB. but after a few slides i had the tail hanging out there again!!!! Sooo much fun

    Rick you should have see the car before i sprayed it off this morning. i would have taken a pic but cant seem to find my camera.
    nothing but fine dust pouder on the trunk and rear bumper and rims, tires were tan rather then black :rofl:
     
  15. Bud

    Bud GG EVO IX MR

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    You have no idea how jealous I am that you can go out there and do that. I should trade my car in and start my own Mopar (Neon/Caliber) Rally Racing Team. Funded and driven by me!! LOL
     
  16. NYCSRTATE

    NYCSRTATE Maximus Want 2 Go Fastius

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    Great post Rick!
     
  17. nevinsrt

    nevinsrt Getaway driver for hire

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    oh and i didnt get high center this time either :rofl:

    rick just get out of the navy and move out here and trade in the 8 for a 4 or a focus and we'll have fun.
    You know we have Rallycross out here!!!:happy:
     
  18. Bud

    Bud GG EVO IX MR

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    When I get to retire with a HUGE disability check I do intend on moving somewhere it is easily accessible and buying a beater rally car....I don't know if I could be that close to Ron though! :D
     
  19. UN4GTBL

    UN4GTBL Full Access Member

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    DAMN! that's awesome!
     
  20. nevinsrt

    nevinsrt Getaway driver for hire

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    there are so many dirt roads out here rick!!!

    I can hear them calling your name!!!!!:hypno: