I wonder how well this Cervini hood would do for aero and heat extraction?
Not too well. Those vents are actually in front of the radiator, and even if they were in the right location they are very small. Like painfully small.
To do the cooling right, you have to cut a fairly LARGE hole in the hood, and it has to be positioned behind the radiator. In addition to this, you will need to form some ducting both on the inlet and exhaust sides of the radiator, and will likely have to relocated some underhood components to get them out of the air path.
Here's how we handled two projects.
First, is a Roush Stage3 with even more engine and lots of suspension upgrades. As part of a combined aero and cooling package it received a larger radiator, standalone oil cooler and a ducted hood. It's difficult to see in the pics, but there is a duct behind the radiator that goes half way up the height of the engine.
Here's the hood we started with. It's a carbon hood with a replica GT500 vent molded into it. This vent is already more open than the real GT500 vent, but see that blue tape, we're going to make it MUCH larger.
Wow, yeah. That's a big hole, but those tanks are in the way of most of it, and had we left the stock-ish GT500 vent in there, they would be blocking ALL of the vent.
So, we relocated the tanks to the battery area (had to make custom tanks and lines) and banished the battery to the trunk (had to make more custom cables) and cleaned up the gap between the radiator and engine to make room for the low profile ductwork.
Then, we filled in the vent hole with some very free-flowing louvers. No tight mesh here, we're looking for flow.
Yep, that big hole flows some air.
Here's a second one we did. It's our track record smashing 2011 GT. Overweight, underpowered, but suspension and aero that worked very well. Again, we start underhood and see that there are tanks and a cold-air intake that are in the way.
Here it is cleaned up so we have some room there. Again, there's a duct built into the bottom of the radiator that comes part way up the engine to deflect air up and out instead of allowing it under the car.
Then, there is the front duct work. The new bumper beam holds the splitter supports, tow hook and the front ducts. Because of this configuration we were able to completely block off the upper grill.
Then came the hood vents. Again, location and size matter. This was after several iterations while we tried to get them as far back as possible while clearing the engine and new intake tube.
Yeah, they are sort of big. But that's what it took.
And the entire view of the system, showing the hood vents, lower radiator intake, splitter, 4" brake ducts, flares, and blocked off aero grill.
