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Cowl induction and hood scoops, part 2

MaineShark

Well-known member
Joined
Sep 21, 2002
Messages
1,326
Location
Rockingham County, NH
Corvette
1979 L82, 1987 Buick Grand National
Several people have convinced me that cowl induction really is the best way to get air to the intake.

So, the first question is, does anyone know a good way to add a cowl induction setup to one of the stinger hoods that Vanacor sells?

The second question is more of an idea:
I have this pet peeve about non-functional scoops. It's just a personal thing. So, I was thinking about what use the stinger scoop might have, if not for feeding air to the engine. And I've had my constant "how do I keep this car as cool as possible" thoughts...

So, what about opening up the stinger scoop, and installing a deflector to force the air under the air cleaner? If I actually end up going with an Air Gap intake, the air could be sent right through the intake's "tunnel," to further cool the intake, and keep the hot valley from heating up the intake manifold. And, if I ever end up going with the "fans in the side air vents" idea that I've been bouncing around, the scoop would be one more source of cool air to draw across the manifold/headers, to keep underhood heat down.

Thoughts (on either topic)?

Joe
 
joe i ran the air gap intake before i swapped to injection,your not going to have to worry about it getting that hot,with the air gap design it keeps it cool,mine was so cool in the winter that my carb. throttle blades were freezing.how about getting a cowl induction air cleaner setup from a 73 or 74 and cut the stinger hood out and ram the air right into the air cleaner,fiberglass some kind of box under the hood so the cowl air cleaner will seal to it.Just a thought.
 
patsnitrovette said:
joe i ran the air gap intake before i swapped to injection,your not going to have to worry about it getting that hot,with the air gap design it keeps it cool,mine was so cool in the winter that my carb. throttle blades were freezing.

Well, maybe I don't want it that cold, but I can always plug the scoop when the temp drops. Or, I don't have to actually duct it to the tunnel in the manifold - I could just use it as a source for additional cool air under the hood.

Actually, I've been toying with the idea of attaching a small, flexible heating element to the bottom of the plenum, to take the place of the heat riser. The nice thing about that setup, would be that you can know it won't be on when you don't want it on, with the flick of a switch.

patsnitrovette said:
how about getting a cowl induction air cleaner setup from a 73 or 74 and cut the stinger hood out and ram the air right into the air cleaner,fiberglass some kind of box under the hood so the cowl air cleaner will seal to it.Just a thought.

Rain...

If the scoop is open to the air cleaner, it will get soaked any time I drive in the rain. And the Shark is a daily driver, so "just drive when it's sunny" isn't an option for me.

I can fabricate (or buy) the air cleaner system to mount to the carb (mount a flange to the bottom of the air cleaner, and glue on a gasket, and you're golden). The question is the fiberglass box. I guess, in theory, that I could make my own (fill the raised area with liquid foam, shape it with a hot wire, glass over it, then dissolve the foam with acetone), but I doubt it would come out looking (or functioning) good. If someone has a pre-made air box available for this hood, it would be better.

I guess I should call Vanacor on Monday, and see if they can custom-make one, for a decent price.

The big question, more than fabrication, is alignment - having the air box stick down far enough to seal against the air cleaner base, but not so far that the hood won't close.

P.S., how'd you like the Air Gap? It seems like a good idea, to me. It should out-flow the stock intake, but still be low enough to fit easily and run a really tall air cleaner, with the additional 1-3/4" of the stinger hood. It also seems like something that I could port and polish, when I do the 406, and even add fuel injection to, if I want.

Joe
 
i loved the air gap,i ran it on my 406 and my 355 noticed a bit of low end loss when on my 355 but screamed on my 406.
 
I am going to buy just a scoop and bond it to my stock hood. It should end up looking something like:
Stinger1.jpg


I will cut a hole in my stock hood and fab up some kind of air cleaner base/box to seal against the hood. I'll probably close up the front of the scoop and just use the cowl for incoming air.

I'm a little scared of the rain, but I see current stock scoops which have the air filter unprotected (Subaru WRX).
 
I still have the dual snorkle ram air cleaner on my 79. Should I just go to an open round unit with my K&N filter and let the cowl supply fresh air to my 383?

-Steve
 
jackofalltrades said:
I still have the dual snorkle ram air cleaner on my 79. Should I just go to an open round unit with my K&N filter and let the cowl supply fresh air to my 383?

-Steve

Personally, I would. In particular, you can get the K&N filter top, and really have a very large filter area (less restriction).

Joe
 
If you 'open' the front of the stinger, couldn't you just get a 'hood-scoop pan-kit' (?) from Summit Racing, and seal it to the underside of the hood? Epoxy some fine-mesh screen into the opening (to keep debris out), and run an air filter element & top (lid?) against the pan. Remove element & top for 'racing'..... I drilled-out almost all the holes of the fake 'screen' on my '79 Z28 hood-scoop, and use the pan kit w/o element & top at the strip; works great, and is worth approx .08-.1 in ET.....
 

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