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.
Naturally aspirated · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 259 ft-lb@ 3,490 rpm | 211 hp@ 5,350 rpm |
| OTT calibration | 267 ft-lb@ 3,470 rpm | 223 hp@ 5,490 rpm |
| Peak gain | +8 ft-lb | +12 hp |
Naturally aspirated · 91 octane
| Run | Peak torque | Peak power |
|---|---|---|
| Stock calibration | 236 ft-lb@ 3,360 rpm | 183 hp@ 4,900 rpm |
| OTT calibration | 247 ft-lb@ 3,280 rpm | 192 hp@ 5,020 rpm |
| Peak gain | +11 ft-lb | +9 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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