Escort G-Timer GT2 Owner's Manual
OWNER’S MANUAL SUPPLEMENT
for Performance Computer with VFD display
New Features
c
New G-Meter Display Options 2-5
Other Improvements 6-7
Metric Operation
Metric/US config
Setup for Metric use 8-9
Metric Differences 10-11
New G-Meter Displays
We’ve added four new ways for the
Performance Computer to display
G-Forces.
G-METER OPTION 9: SKIDPAD
Press and release the G-METER button as necessary to
select “G-METER OPTION 9.”
Car testers use a large circular track (“skidpad”) to
measure maximum cornering capabilities of vehicles.
This display shows only the cornering G-Force.
The small number on this display is a continuously computed two-second average reading for the cornering
G-Force. This averaging eliminates false readings
caused by momentary spikes.
(You can change the averaging time from 1 second to
16 seconds in the user setup mode. For reference, at
.8 G, it will take about 15 seconds to travel a full lap
of a 300 foot diameter skidpad.)
The large number on this display holds the peak reading (of the averaged number) for seven seconds. This
allows you to evaluate the vehicle at its maximum cornering capability, then slow down a bit and still have
time to view the highest reading achieved.
In this example, the small number shows that
the current cornering G-Force is .79 G, and
the large number shows that the peak skidpad
reading in the last seven seconds was .95 G.
ENGINE DAMAGE WARNING
Some street vehicles are not designed for long-term
continuous turning in one direction, and it may be possible to cause extensive engine damage when the oil
in the engine’s oil pan is held to one side by sustained
cornering forces. Make sure your vehicle’s oil is at the
proper level, and immediately stop the skidpad test if
your vehicle’s oil pressure drops.
Comparing your results to published tests
Professional testers typically use new vehicles (with fulltread tires) on large asphalt skidpads, usually 200 or
300 feet in diameter.
Smaller diameter circles (such as you might perform
in a parking lot) will produce higher G-Forces. Abrasive surfaces (such as concrete) will also produce higher
G-Forces. Finally, worn tires (with little tread remaining) will produce higher G-Forces (on dry surfaces).
G-METER OPTION 10: G-FORCE GRAPH
Press and release the G-METER button as necessary to
select “G-METER OPTION 10.”
Note: This “moving chart” display will be easier to
understand after you try it in your vehicle.
The graph shows a moving chart that shows how the
G-Force has changed over the past seven seconds.
The large number on this display shows the peak of
your combined vector G-Forces (see explanation in the
owner’s manual in G-METER option 2: Friction Circle)
over the past seven seconds.
This seven second peak hold allows you to complete a
maneuver (such as a turn), then after completing the
maneuver, still have time to glance at the display to
see what G-Force you attained.
This display is very useful for evaluating driver smoothness. For example, by having a passenger monitor the
G-Force as a driver brakes for a corner, turns into the
corner, and then accelerates out of the corner. Ideally
the G-Force graph will show a continuous high g-force
with smooth transitions as the car goes from braking
to cornering to acceleration.
The car has begun to brake,
and is decelerating at .10 G.
c
2 seconds later, the car is braking harder,
now decelerating at .55 G.
c
2 seconds later, braking has been reduced to .10 G.
(The peak G-Force over the past 7 seconds is .55 G.)
c
2 seconds later, the car is no longer braking.
(The peak G-Force over the past 7 seconds is .55 G.)
c
2 seconds later, the car is no longer braking.
(The peak G-Force over the past 7 seconds is .55 G.)
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G-METER OPTION 11: 2-AXIS GRAPHS
G-METER OPTION 12: 2-AXIS W/ PEAKS
Press and release the G-METER button as necessary to
select “G-METER OPTION 11.”
Note: This “moving chart” display will be easier to
understand after you try it in your vehicle.
The left-hand graph shows acceleration and braking.
Acceleration is displayed as a line above the center.
Braking is displayed as a line below the center.
The right-hand graph shows cornering. Cornering to
the right is displayed as a line to the right. Cornering
to the left is displayed as a line to the left.
The number shows the peak of the combined G-Force
over the past four seconds.
2 seconds later, the car has braked harder, then
reduced braking. The car is beginning a right turn.
The peak G-Force over the past 4 seconds is .60 G.
2 seconds later, the car is no longer braking, but it is
cornering to the right at .75 G.
(The peak G-Force over the past 4 seconds is .75 G.)
2 seconds later, the car is still cornering to the right,
and is beginning to accelerate.
(The peak G-Force over the past 4 seconds is .80 G.)
2 seconds later, the car continues to accelerate.
(The peak G-Force over the past 4 seconds is .80 G.)
Press and release the G-METER button as necessary to
select “G-METER OPTION 12.”
Note: This “moving chart” display will be easier to
understand after you try it in your vehicle.
The graphs are identical to option 11.
The upper number on the left shows the peak acceleration or braking force over the past four seconds.
The lower number on the left shows the current acceleration or braking force over the past four seconds.
The upper number on the right shows the peak cornering force over the past four seconds.
The lower number on the right shows the current
cornering force over the past four seconds.
Peak acceleration or
braking force over "
past 4 seconds
Current acceleration !
or braking force
Peak cornering
" force over past
4 seconds
! Current
cornering force
The car is decelerating at .50 G.The car is decelerating at .50 G.
2 seconds later, the car is braking at .30 G. The peak
braking G-Force over the past 4 seconds is .60 G.
The car is beginning a right turn, cornering at .15 G.
.
2 seconds later, the car is not braking, but the peak
braking G-Force over the past 4 seconds is .60 G.
The car is cornering to the right at .75 G.
2 seconds later, the car is still cornering at .75 G, and
is accelerating at .30 G. The peak accelerating/
braking G-Force over the past 4 seconds is .50 G.
2 seconds later, the car continues to accelerate, and
is now cornering at .15 G.
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