What peak torque is shown on this dyno sheet?

The green trace shows 412.9 lbft at 4413 RPM (90 mph); the yellow trace shows 358.2 lbft at 4398 RPM.

What air/fuel ratios are recorded?

The yellow trace shows 11.43 AFR at 5626 RPM / 115 mph, and the green trace shows 12.21 AFR at 4286 RPM / 87 mph. The AFR curves drop from about 18 at low RPM to roughly 10.8–12 at higher RPM.

Where and when was this dyno run performed?

At Xact Dyno in Tempe, Arizona, on a Dynapack chassis dynamometer, dated 26-Apr-2007 at 12:10:42.

What correction method and settings were used?

Fly wheel torque was measured with SAE correction, a ratio of 3.448, and a torque correction factor (tcf) of 1.00; gains listed are 54.6 (torque) and 0.8 (AFR).

What vehicle/run is this dyno sheet for?

The Run ID is 'KOVACH STG3 SRT4-2' in folder 'UMS', indicating a Stage 3 SRT4 run.

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Dodge SRT-4 Stage 3 Dynapack Dyno Sheet - 412.9 lb-ft Torque & AFR Graph

Dynapack Xact Dyno Chart Flywheel Torque and Air-Fuel Ratio vs RPM (Petrol)

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Dynapack chassis dyno graph overlaying flywheel torque (peak 358.2 lb-ft at 4398 rpm) against petrol AFR sweep dropping to ~11.4:1 under load.

AI caption April 2007 · Photo 526 of 673

This document is a chassis dynamometer results sheet produced on a Dynapack dyno at Xact Dyno of Tempe, Arizona, dated 26-Apr-2007 (12:10:42). The run ID is "KOVACH STG3 SRT4-2" in the folder "UMS." The sheet shows two graphs plotted against Engine RPM (approximately 1775–6000 RPM). The left graph shows fly wheel torque (UMS, SAE correction method) in lbft, with peak values noted in the data boxes: 358.2 lbft at 4398 RPM / 90 mph (yellow trace) and 412.9 lbft at 4413 RPM / 90 mph (green trace). The right graph shows air/fuel ratio (AFR Petrol) versus RPM, with AFR values ranging from about 18 down to roughly 10.8–11.5 at higher RPM; data boxes list 11.43 AFR at 5626 RPM / 115 mph (yellow) and 12.21 AFR at 4286 RPM / 87 mph (green). Both tables display a gear ratio of 3.448, a torque correction factor (tcf) of 1.00, and gain values of 54.6 (torque) and 0.8 (AFR). A reader can learn the torque curve shape (torque climbing sharply from ~3000 RPM, peaking near 4400 RPM around 412.9 lbft, then falling toward 6000 RPM) and the fueling behavior of this Stage 3 SRT-4 build.

This document covers 2007, which may differ from this 1996 Ford Probe.

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Frequently asked questions

What peak torque is shown on this dyno sheet?: The green trace shows 412.9 lbft at 4413 RPM (90 mph); the yellow trace shows 358.2 lbft at 4398 RPM.
What air/fuel ratios are recorded?: The yellow trace shows 11.43 AFR at 5626 RPM / 115 mph, and the green trace shows 12.21 AFR at 4286 RPM / 87 mph. The AFR curves drop from about 18 at low RPM to roughly 10.8–12 at higher RPM.
Where and when was this dyno run performed?: At Xact Dyno in Tempe, Arizona, on a Dynapack chassis dynamometer, dated 26-Apr-2007 at 12:10:42.
What correction method and settings were used?: Fly wheel torque was measured with SAE correction, a ratio of 3.448, and a torque correction factor (tcf) of 1.00; gains listed are 54.6 (torque) and 0.8 (AFR).
What vehicle/run is this dyno sheet for?: The Run ID is 'KOVACH STG3 SRT4-2' in folder 'UMS', indicating a Stage 3 SRT4 run.