XLR-V Tune at TDC...

Dr. McCraw brought us his 2006 Cadillac ZLR-V in for a tune with HP Tuners. For those unfamiliar with the XLR-V, it features a A 4.4 L (266 cu in) supercharged Northstar engine.

All Stock, no mods


Tuned with HP Tuners




The blue chart is the baseline pull, and the green chart is the tuned pull. Even though this is a bone stock car, notice how lean the stock tune is. Throttle was tipped into slowly on the final pull, there is no low RPM power loss.



And here is a chart with the torque numbers.