Here is how the duct fits up against the cooler while still allowing the air from the lower vent to access the cooler as well. We have probably increased the airflow to the cooler 10 fold! The Greddy oil cooler kit has a sheet metal baffle plate that helps direct the air from the lower scoop to the cooler and now it also has direct airflow from our scoop too.
Our car does not have oil temperature logging but we instead logged water temp using our Access port. In our experience, oil temp is usually slightly higher than water temp and reducing oil temps also reduces water temps. In our testing so far, for street driving the scoop made very little difference which is what we expected. When driving on the highway we found that water temps are reduced 5-10 degrees from 70-80mph! In fact when driving with an ambient temp of 71-74 degrees at 70-80 mph our coolant temps ranged from 168 to 174 degrees! This is really cool and we will probably have to run the stock cover for winter driving to avoid overcooling the oil! We love the way the duct came out and can’t wait to see what the impact is on our oil and coolant temps during the next track day! We think the scoop will give us about 10 degrees more thermal headspace on the track.