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Hood Vent Testing

Our goal with these vents was to decrease under hood temps. We tried various fin counts, and shapes to find a balance between performance, looks, and ease of install. We did not want to cut out any of the hood support structure. 

Our data was collected over the course of 60 minutes maintaining an average speed of 75mph. A temperature sensor was placed on either side of the engine bay. One mounted to the passenger side motor mount, and the other mounted in front of the battery on the driver side. 

The car used is was a 2015 GTI S. It has a R600 closed intake, Wagner Intercooler, stock downpipe, 3" Corsa catback, Stage 1 EQT Tune and our MK7 Chassis Splitter. 

Readings were taken each minute, for 60 minutes. 15 - 1 minute readings were averaged together on a rolling basis to smooth out the graph data. Minute 1, is the average of the temps from the previous 15 minutes during the warm up period. The car was driven down the same section of road starting at an elevation of 138', peaking at 600' and ending back at 138' above sea level. 

At 75mph the peak under hood temps with a stock hood peaked at 145*F. With just the hood vents installed, temps decreased over 20* F to 123* F. 

There are many factors at play with hood vents. Front Aero parts, grill style, intercoolers, intake, speed, elevation all can affect the efficiency flow of the vents. Our testing was done to provide a baseline of information for our customers. Your results may vary.