Can a proper custom tune - adjusting idle, low-RPM fueling, and throttle response - calm down cam bucking?
Here is what the documentation says. Each point links to its source; tables and names vary by computer, operating system and tuning software.
- Gen IV LS, Gen V LT: An aftermarket cam in a delete build requires adjusting idle airflow, fueling, spark, torque modeling, and other drivability tables, beyond simply switching deactivation off. (LSX Magazine)
- GM P01 0411; Gen III LS: A large cam typically lowers volumetric efficiency at low RPM and raises it at higher RPM, so the stock idle-region VE values become wrong after a cam swap. (LSX Magazine)
- LS Gen III/IV; 1997-2013: The Desired Idle Speed table is the first stop after a performance cam install: a stock cam idles happily at 525-550 rpm, while a performance cam needs roughly 750-850 rpm depending on duration. (LSX Magazine)
- LS Gen III/IV; 1997-2013: A proper tuning datalog should be 15 to 20 minutes long and cover all operating states including cold start, idle, cruise, part throttle, and wide-open throttle where safe. (PCM of NC)
More in cam tuning, or build a checklist for your swap with the tune checklist tool.
Confidence: medium — sources disagree or are limited; check the sources below.
Community discussion
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Sources
- DOD, AFM, And DFM Deletes: A Q&A With Michigan Motorsports — LSX Magazine
- Remote (Email) Tuning with HP Tuners FAQ — PCM of NC
- LS Tuning For Optimum Performance — LSX Magazine
- Project Corn Star: Tuning An LS For Boost With HP Tuners — LSX Magazine