Background:
In a recent post about flow testing the Beta-13 version of the MGM7 intake, I addressed the possibility of using a smaller Vibrant air filter. The smaller model 10960 has arrived, and I set up a flow test to compare it with the taller model 10961.
The smaller Vibrant has a 6-inch inlet, while the taller filter has a 7-inch inlet. This required modifying the inlet of the MGM7 intake, shown below, original on the left and modified on the right.
Fortunately, only the inlet adapter needed to be modified, and the rest of the intake is unchanged. This allows me to replace the intake end for the test and keep the remainder the same.
Test setup:
The Beta-12 version was modular, making it well-suited for changing out the filter end. This intake is attached to the flow bench using a silicone reducer that attaches to a 3″ diameter adapter.
The intake is tested at 12″ of H2O, which is significantly less than what intakes attached to a turbocharger inlet elbow are tested at, 28″ of H2O, because the absence of the elbow removes a point of substantial restriction.
The smaller filter is then swapped onto the intake, and the measurement is repeated.
Test results:
The taller Vibrant filter flows 587 CFM @ 12″ of H2O, and the smaller filter flows 582 CFM @ 12″ of H2O. The results are shown on the graph below:
Conclusions:
Two models of Vibrant air filters under consideration for use with my MGM7 intake design were flow-tested to compare the smaller to the larger. The larger filter flowed 5 CFM more than the smaller at a test depression of 12″ of H2O.
Both air filters support a flow rate that meets the MGM7 intake requirements.