MGM7 Beta 7 Flow Test and Test Fit

Status:

Continuing work on the Mk7 intake with another few tweaks to the design and then printing a product for testing.

The length needs to be increased slightly; the attachment ring for the air filter is a little close to the battery and is also close to the post support on the battery tray for the stock airbox.

I must also bring the upper edge down as it is too close to the hood.

The current intake configuration is for a 3″ turbo inlet elbow (TIP). This is not what I have in mind for this intake, but for now, it is helpful to have the intake taper to 3″ at the outlet so I can perform the test fitting on the car. At the moment, the DBV2 TIP is installed on the vehicle, so being able to attach the intake is beneficial.

Flow testing:

I ran through flow testing three configurations. First, using the MST V1 TIP through an IS20/IS38-sized adapter. Second, through the MST V2 TIP and a hybrid turbo-sized adapter. Finally, through a 3″ elbow that attaches to an adapter sized to fit the Mabotech M720 turbo which has an 83 mm compressor inlet.

Note: Since the DBV2 TIP is installed on the car, I did not use it for the flow testing, although the DBV2 is better suited to the hybrid adapter since it has a 55 mm outlet versus the MST V2 53 mm outlet.

A comparison with other intakes that have been tested using a stock-size adapter shows a slight improvement in airflow:

With the hybrid turbo adapter, there is a larger improvement in airflow. I expect this difference to become more significant if the DBV2 TIP were used:

The Beta-7 shows a small increase in airflow compared to the Beta-6 test:

Conclusions:

Although the intake performance is improving, the design needs to be revised to allow it to fit within the engine compartment of the Mk7 GTI.

Changes are underway to lengthen the intake and lower the upper edge of the bend to the elbow.

References:

• Summary page of progress