Quote:
Originally Posted by m6-lt1
This! I want to be sure it's okay to run this without a tune before buying it. How do we know the car isn't running rich or lean? GPI tested it on a tuned car (I know the tune wasn't changed for the intake) not sure if that affects it not getting a CEL or running lean or rich.
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Given that most of the extra airmass will be at higher rpms where the restriction was on the regular LT1 manifold, the MAF sensor should read the new extra airflow at high rpms fine. After 4000 rpms the ECM completely ignores the MAP sensor and the volumetric efficiency tables and solely relies on the MAF sensor.