Custom Tuning


All Nelson Performance tunes will consist of the following changes depending on modifications to your vehicle, the grade of fuel you run and your driving style. All tunes are done custom for each vehicle. We do not offer any can tuning or handheld programmers.

We optimize the air/fuel ratio, naturally aspirated engines are set at about 12.8 a/f at wide open throttle. Forced induction engines run at about 11.5 a/f under pressure/boost/wide open throttle. GM sets the a/f ratio very rich to allow the end user to run 87 octane and load the vehicle with weight exceeding the manufacturers load rating. By modifying the a/f ratio to be more precise you will gain more power by optimizing the grade of fuel you are running at the time if the tune.

We increase timing throughout the RPM range and increase throttle response based on your modifications and the grade of fuel you are running. The higher octane you run the more timing we are typically able to add, which  increases torque and horsepower. GM must run conservative tables to ensure every vehicle can operate properly on 87 octane.

We modify the GM driving shift patterns to make the truck feel more responsive.

We can remove all or a percentage of your vehicles Torque Management. Torque management is defined by GM as; the ability to lower torque output to the wheels. This means that when you want the full potential of your truck to lay down the power, GM pulls timing to reduce power. The effects of TM are hesitations between shifts, a short pause off the line, and reduced power when the pedal is pushed to the floor.

We can also remove the speed limiter, adjust for tire size and gear ratio, and remove any emissions devices not being used (ex: rear O2’s, catalytic converters, egr, etc.) individually based on custom needs. Call for pricing.

All ECM’s are locked upon completion of the tune to prevent third parties from corrupting the file. Computers can be unlocked at any time; However the ECM will be flashed with The OEM calibration.

Custom tuning cannot fix any mechanical issues, such as transmission shifting issues, misfires, ect,  or issues with critical sensors, front o2 sensors, maf, ect. If you have any questions about an issue you are not sure about please give us a call before you order your custom tune. This way we are able to let you know if it is something we can address in the tuning or if it is an issue you will need to address before a tune can be done.

Tune button