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 | 248 ft-lb@ 4,010 rpm | 248 hp@ 6,020 rpm |
| OTT calibration | 256 ft-lb@ 4,020 rpm | 255 hp@ 6,040 rpm |
| Peak gain | +8 ft-lb | +7 hp |
Magnuson supercharger · OTT on three pulley sizes · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| OTT, 90mm pulley | 301 ft-lb@ 5,090 rpm | 363 hp@ 6,640 rpm |
| OTT, 87mm pulley | 320 ft-lb@ 5,020 rpm | 372 hp@ 6,580 rpm |
| OTT, 84mm pulley | 342 ft-lb@ 5,060 rpm | 402 hp@ 6,880 rpm |
Naturally aspirated · 87 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 143 ft-lb@ 3,630 rpm | 126 hp@ 5,160 rpm |
| OTT calibration | 148 ft-lb@ 3,650 rpm | 125 hp@ 5,190 rpm |
| Peak gain | +5 ft-lb | — |
TRD / Magnuson supercharger · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock TRD S/C calibration | 279 ft-lb@ 2,600 rpm | 234 hp@ 5,090 rpm |
| OTT calibration | 317 ft-lb@ 3,670 rpm | 280 hp@ 5,430 rpm |
| Peak gain | +38 ft-lb | +46 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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