The heel
and toe gear change technique is critical
on the racetrack but also very useful in every
day driving. When you are on the track it
is important to keep the car in its power
band and if you drive a turbo you want to
avoid lag at all costs so need to keep the
turbo spinning.
Fast driving is all about keeping the balance
of the car and this is so important when braking.
As you brake you throw the cars weight to
the front. Under heavy braking the front wheels
lock up and you skid.
Even when changing down a gear you risk throwing
more of the cars weight to the front and if
you do this whilst heavily braking it can
be enough to cause you to lose control.
As the car slows you need to change down a
gear to maintain the power band of the car.
You have few options, either change down a
gear and have the engine pull throw you into
a skid, release the brake and blip the throttle
to match the engine speed with the new gear
speed (this means braking early to get enough
time to do this properly) or somehow whilst
still braking blip the throttle and match
the revs.
This is where the heel and toe gear change
come in, the technique involves braking with
the ball of the foot (the toe area) and blipping
the throttle with the heel to rev match for
a smooth down change.
This technique is hard to master. The obvious
difficulty lies in having enough control over
the brake and being able to adjust the throttle
simultaneously. The first few times you do
this it will be far from smooth but you need
to be patient and bear with it - it does make
a big difference when driving and will help
you to feel more at one with the car.
Shoe choice is vital and torquecars recommend
a fairly thin soled shoe to give you the subtle
control and feel you need.
Practice at first in a stationary car. With
the engine running put your toe on the brake
and use your heel to control the throttle.
Bring the revs up to 1500 rpm and hold it
there for a count of 5 then let the revs drop
and bring the revs up to 2500 rpm. The aim
is to do this as accurately and as smoothly
as possible. When you have mastered a good
level of throttle control on the heel practice
braking with your toes the big toe and ball
of your foot to be more precise. This will
seem relatively easy after the last exercise.
The next stage involves learning what engine
speed goes with what gear. As you drive around
change down a gear and note the amount of
revs the gear requires for a given speed.
So bring the car up to 30 in 4th gear and
change down. The revs will increase from say
2000 rpm to 2600 rpm - this is the amount
of revs you need to have set before you release
the clutch. You will notice the car lurches
until the correct engine speed is reached
and you are aiming to eliminate that lurch
by correctly matching the engine speed. Rather
than being a memory exercise you will learn
to do this instinctively. When you have become
proficient at this move on to the next step.
Practice accelerating using your heel only.
As you accelerate let your toes raise and
tip to enable you to develop independent control
over the heel and your toes.
The next step is to combine all these methods
and start performing heel and toe downshifts.
To practice keep your speed down and make
sure the road is empty.
At first only apply the heel and toe technique
when braking and bringing the car to a stop.
But instead of dipping the clutch as you slow
up, try changing down a gear or 2. Go from
4th gear to 3rd or 2nd gear but use the heel
and toe braking and throttle control method.
The aim is for a smooth gear change which
is only possible if you increase the engine
speed to match the road speed for the selected
gear. When you are happy with this method
apply it when slowing up for bends that require
a down shift.
Be very careful as the last thing you want
to do is skid out of control due to excessively
heavy pedal control. Double clutching is not
the same thing as heel and toe. Torquecars
have covered this subject in the double declutching
article.
Some cars pedals are more suited to this method
than others. If you find that the pedal positions
are wrong you could try an aftermarket pedal
cover set. These often come in a sporty looking
drilled metal effect and usually make the
throttle pedal a little longer.