Understanding Your Data

Reading Throttle

The throttle trace shows how you manage power on corner exit, through straights, and in transitional phases. While braking determines how you enter a corner, throttle determines how you leave it — and exit speed has a compounding effect on the entire following straight.

Throttle Exit Patterns

The shape of the throttle trace from corner apex to full straight-line speed reveals technique, confidence, and car behavior.

Clean Progressive Exit

A smooth, continuous ramp from 0% to 100% as the car straightens out of the corner. The trace looks like a steady upward slope. This is the ideal shape — it feeds power to the rear tires at a rate they can handle, maximizing acceleration without breaking traction.

The steepness of the ramp depends on the corner. Slow corners in high-power cars require a gentler initial ramp. Fast corners with aerodynamic grip allow a steeper ramp because downforce helps the tires cope with the power.

Binary Throttle

A jump from 0% straight to 100% with no graduation. The trace looks like a step function. In low-power cars with high grip, this can work. In anything with real power, it causes wheelspin, traction control intervention, or a snap of oversteer. The net result is slower acceleration despite the pedal being fully depressed.

Staged Application

Two or three distinct steps — partial throttle, then more, then full. The trace looks like a staircase. This is common in drivers who are learning a car's limits. It's safer than binary throttle but slower than a smooth ramp because each step momentarily under-utilizes the available grip.

Mid-Corner Behavior

What happens between brake release and full throttle application tells you a lot about car balance and driver confidence.

Lifts

Brief dips in the throttle trace mid-corner — the driver had partial throttle, then momentarily lifted. These usually indicate a moment of oversteer that needed correction, a brief loss of confidence in the car's grip, or the driver adjusting their line. Occasional lifts are normal. Consistent lifts in the same corner every lap point to a car balance issue (likely oversteer on power).

Coasting Gaps

The distance between brake release and throttle application where neither pedal is active. In telemetry, this shows as the brake trace at zero and the throttle trace at zero simultaneously. The car is coasting — neither decelerating nor accelerating — and that's lost time.

Small coasting gaps through complex corners are acceptable. Large gaps indicate the driver doesn't know when to get back on the throttle, or the car's balance is too unpredictable to commit to acceleration.

This connects directly to the "Throttle Pickup Delay" corner factor in the corner analysis. A high value means you're leaving time on the table between brake release and throttle application.

Maintenance Throttle

Holding 20-40% throttle through a corner to keep the car balanced and the rear tires generating some longitudinal force. The trace shows a low, flat plateau through the cornering phase rather than zero. This technique is common in high-downforce cars where trailing throttle helps stabilize the rear. It's not wasted input — it's a deliberate technique that keeps the car settled.

Diagnosing Problems

Sawtooth Pattern

Rapid on-off-on-off oscillations in the throttle trace on corner exit. This is almost always wheelspin triggering traction control. The driver is applying too much throttle too soon, the rears lose grip, traction control cuts power, grip returns, power resumes, and the cycle repeats. The fix is a smoother initial throttle application.

Hesitation Before Full Throttle

The trace ramps to about 70-80% and then plateaus for a moment before continuing to 100%. The driver is waiting to feel that the car is stable before committing to full power. This indicates the exit phase feels unpredictable — possibly due to oversteer on power, inconsistent rear grip, or a setup that transitions poorly from cornering to acceleration.

Early Full Throttle with Speed Plateau

The throttle trace hits 100% early, but the speed trace doesn't climb at the expected rate. Despite the pedal being fully depressed, the car isn't accelerating efficiently. This is traction-limited acceleration — the rear tires are spinning, and the energy is going into heat rather than forward motion. Traction control may not be intervening aggressively enough, or it may be disabled.

Fuel-Saving Techniques

Lift-and-Coast

The telltale fuel-saving technique shows up clearly in telemetry. Instead of staying at full throttle until the braking zone, the driver releases the throttle early and coasts before braking. In the trace, you'll see a flat zero-throttle section on the straight between the end of full throttle and the start of braking.

Effective lift-and-coast costs surprisingly little lap time when done correctly — releasing the throttle where the car is already near peak speed and aerodynamic drag is doing most of the deceleration anyway. A 50-meter lift-and-coast might cost 0.1 seconds but save enough fuel for an extra lap before pitting.

Short-Shifting

Upshifting earlier than the optimal rev point to reduce fuel consumption. In telemetry, the speed trace shows small steps at lower-than-normal speeds on the straight. Each upshift happens at a lower RPM. This is less common than lift-and-coast but can be combined with it for maximum fuel saving.

See Also