I just got this in an email from the head of the tuning department.
We just ran these this morning, back to back. The comparison was done on a 2006 Nissan Titan with 5.6L V8. The runs were about 10 minutes apart, and there were no differences in ambient conditions between them.
Conditions for Hypertech to UpRev respectively…
Ambient air temp was 89.5F to 90.75F
Baro Pressure was 29.911% to 29.919%
Humidity was 55.25% to 53.60%
With an overall STP Correction factor of 1.056% to 1.057%.
The conditions are almost identical, and as repeatable as can be made. As you see, the Hypertech tuning makes more power down low (as torque ramps up) and more power at the topend. Our tune makes 3-4Ft-Lbs more from 4500-5200RPM, and 4-5HP more above 5600RPM. The lowend torque is difficult to measure below 3500RPM due to the torque converter slippage, but the separation above UpRev’s tune between 3000-3500 indicates that the engine is making more power with our tuning. Although the spread in the curves at 3300RPM shows us making ~10Ft-Lbs more, that is probably a quick jump in power due to the RPMs ramping up just before the torque converter begins to hydraulically lock-up. The separation is real, but the brief separation is not indicative of the true power of the engine, rather of the power through the entire drivetrain with a lot of dynamics due to converter lockup.