Every OTT tune is developed and validated on OTT’s in-house dynamometers and on the road. These are OTT’s own Dynojet charts: on most, the red line is the truck on its stock calibration and the blue line is the OTT tune, on the same fuel.
OTT tunes for the broadest torque curve, not a headline number — so read the whole curve, not just the peak.
Gas · OTT Stage 1 · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 341 ft-lb@ 2,750 rpm | 270 hp@ 5,650 rpm |
| OTT Stage 1 | 377 ft-lb@ 2,970 rpm | 308 hp@ 5,510 rpm |
| Peak gain | +36 ft-lb | +38 hp |
Hybrid · OTT Stage 1 · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 426 ft-lb@ 3,060 rpm | 294 hp@ 5,300 rpm |
| OTT Stage 1 | 453 ft-lb@ 3,020 rpm | 334 hp@ 5,720 rpm |
| Peak gain | +27 ft-lb | +40 hp |
Naturally aspirated · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 252 ft-lb@ 4,340 rpm | 241 hp@ 5,550 rpm |
| OTT calibration | 262 ft-lb@ 4,320 rpm | 250 hp@ 5,520 rpm |
| Peak gain | +10 ft-lb | +9 hp |
Naturally aspirated · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 249 ft-lb@ 4,160 rpm | 216 hp@ 5,180 rpm |
| OTT calibration | 270 ft-lb@ 3,410 rpm | 222 hp@ 5,220 rpm |
| Peak gain | +21 ft-lb | +6 hp |
Dyno charts © Overland Tailor Tuning, published with permission. Figures are the peaks printed on each Dynojet sheet (SAE correction, smoothing 5), rounded to the nearest whole number. Results vary by dyno, conditions, modifications and the individual truck — these are OTT’s test vehicles, not a guarantee for yours. Where one chart covers several vehicles, it’s because OTT publishes that chart for each of them; the truck actually on the dyno is listed on the card.
Book a spot at an OTT Tune Day near you, or schedule the tune at our Grandview shop.
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