I found an interesting post on another forum from a dude who installed his factory hood scoop in reverse, drilled two holes in the hood under it, then even posted some #s showing lower underhood temps. I've been thinking of heat lately given the car is going to blown this week. The thing gets mega hot on its own, let alone with any F/I under there. Not to mention, there is the ever present hood lifting issue these cars have at speed that would probably be solved by this. I don't care for the look of the factory scoop, but there are others available. He drilled two fairly small holes and saw a positive result, so one larger hole may do even better perhaps...

I am planning to do a shaker hood at some point, so my hood is already destined to be cut anyway. I am thinking about picking up a painted scoop and maybe trying something like this as an experiment for a while. As long as I keep the hole smaller than the entire stamped out area under the hood where the shaker goes, it shouldn't be an issue to change it later (and if a big screw up happens, theres an excuse to buy a new hood, lol).

Any thoughts or observations on what this guy did (from a functional perspective, I realize there are probably scoops that would look nicer in reverse than the stock one -- the Roush maybe if its hollow)?

http://www.modularfords.com/forums/s...d.php?t=110900

 

Honestly I dont think it would look very good. Try checking out a 2.5" cowl rise.

But to each his own.

Good Luck.

 

Well, I'm more wondering about function than looks. With the right scoop, I don't think it would look any better or worse than any other hood scoop. Reversed scoops are not uncommon. The cost of a painted hood is $1000-1200, we're talking like $250 here, lol. The write-up just seemed interesting to me was all...

 

I'm not sure I follow HOW it would help to reduce the heat in the bay. The stock scoop is closed to begin with. In addition to rotating it (whcih I assume is to help mitigate water intrusion) and drilling a few holes, did he also remove the fake grill? I'm also wondering what the airflow is... whether it's sucking cool air in or blowing hot air out. Either way, unless the holes are rather large I can't imagine a lot of air exchange that would be of any significance. But I've been wrong before...

 

The scoop is hollow, and he removed the faux mesh area (or at least, dremel'd it out). Then he drilled two what appear to be soup can sized holes below it in the hood. It most certainly would allow for rising heat to ventilate out of the engine compartment at a minimum... like a chimney, lol. My understanding is that the stock hood and engine bay create a pressurized zone where the heat largely stays in (I've seen it called a poor design more than once). Theoretically if you gave the heat somewhere to go, as you were driving fresh air would be coming in from the front of the vehicle. This is the idea behind cowl hoods. I would also expect that when you returned home after driving, that the engine would cool down much faster. As most of you have probably experienced, the car stays HOT for a really long time.

Rain wouldn't be much of a factor with the scoop in reverse. You'd have to take care during a car wash, and probably would want to put some type of screen over the hole to prevent leaves or any junk from going in there. IDK, it seems reasonable to me, lol. I just like little DIY projects and it seemed like an interesting thing to try. Given the factory hood has the shaker cutout area already, you wouldn't be compromising any structural integrity. Also, if you just used 3M tape the stick the scoop on, it probably wouldn't fly off given it would be aerodynamic and not catching wind/drag.

There is some chance that the air flow over the scoop while moving might provide enough vaccuum to even suck the heat out, but that is getting into a discussion of aerodynamics of which I know little about. If you look at heat extractor hoods though, pay attention to the placement and direction of the vents, they are facing back. I do know that many old school muscle cars and even NASCAR uses some sort of reverse cowl/scoop for induction... In this case however, the only function of the scoop would be heat extraction...

 

Do it. Post pix.

 

Oh I'm quite willing to do it. I was going to put a shaker on there anyway, so cutting a hole in that area of the hood that is smaller than the shaker hole would be doesn't phase me at all. I'm just trying to determine how much of a difference it would make. The dude that did this actually got results, and I think his design could have used one much, much larger hole and might have performed better.

The other possible side effect of this would be increased engine/blower sound which isn't a bad thing. I'd need to find a scoop that I am sure is hollow however before I spend money on it.