EPL MAF Flow Test

After conducting an additional flow test with the stock S4 MAF and a different power supply, to confirm the results obtained, I swapped to an 85mm EPL MAF for the S4.

Stock S4 Hitachi MAF
Stock S4 Hitachi MAF
EPL 85mm S4 MAF
EPL 85mm S4 MAF

To my surprise the resulting airflow for each voltage point that I measured corresponded closely with the readings obtained with the stock diameter MAF housing.

Stock vs EPL MAF housing
Stock vs EPL MAF housing

Added a comparison with the MAF attached to the stock modified airbox.

maf_airflow_with_airbox