Anyone ever convert a Grabber Dual scoop hood to ram air? It would be great if the under hood tin and air cleaner set up from some other ford or other brand would work on this. I realize that the currently solid hood scoop pieces would need to be opened up, but that is the easy part. It’s the tin work, rubber gasket and air cleaner that is the hard part. 67/8 Firebird has similar set up . Thoughts?
Scoops on the Pontiacs were much closer together, not worth spending a ton of money to refab the whole thing. It would have to be a total custom build. There are those that would say you wouldn't get enough air to make it woth while but having own a GTO I can say the scoops aren't much different in size.
It may be easier to get a mid 80's Mustang 5.0 HO dual snorkel air cleaner and fab some duct work. I will be attempting a factory type thing with the Comet GT scoop in the future. One project at a time.
The way a Maverick's hood slants up in the front keeps air from going in almost any scoop that has it's opening at the surface of the hood.
That may be so for the ram air effect but it would supply cool, outside air to the intake so there are still benefits. That's really all any of the functional OEM set ups did.
I have a Mustang scoop on mine, larger opening than the two snorkels on a Grabber hood. Unless the car is sitting still nothing goes in there, not air, not rain, nothing. The air flows right over top of it. I've thought about having an opening in the slanted area at the front of the hood with duct work on the underside....
Since I drove onto the freeway with a hood that wasnt latched all the way and my hood is ruined, I have thought about cutting a hole in it right above the air cleaner to see how close everything was under there and get fresh air in. I have an air cleaner/filter that is one piece and opened on top.... but I have not done it. Still trying to get the chassis caught up to the new engine and fresh air will have to wait.
Depends on what carb you have if that's a good idea or not. Holleys are designed to meter air flowing across the top. Straight down air flow can upset the metering. I saw a test one time where they installed one of those K&N lids with the filter element on top and lost 15 hp.
Somebody did open up the little scoops and duct in a duel snorkel air cleaner. I remember a thread about it. It did nothing as the air doesn't really get into them enough to matter. Update: see post 18 here what Thack did to one of his cars ........... http://mmb.maverick.to/threads/grabber-scoops.68681/page-2
With all due respect, I don't think I buy into your Holley metering theory. I also believe there is more to the story concerning the K&N lid test. On any down draft carburetor all air flow through the throttle bores is down, thus metering is based on air speed and its related pressure drop through the ventures moving in a downward direction. It is not metered by air flowing across the top of the carburetor. I believe a carburetor without any device directing air down into its ventures, in other words airflow is allowed to travel straight across the top of the carburetor i.e. no air cleaner, creates a low pressure area at the top of the carburetor and therefore likely to deliver less power. As RMiller points out, a system that can deliver cool dense air into the top of the carburetor will have a far greater effect on horsepower over any ram air system. Just my thoughts.
