Thread: Best way to get cold air to my Air Filter

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ok guys i need your help on this.....I am trying to decide on the best course of action for this... I am building another Drag/Street car i am making this one out of another early 90' Camaro RS so far we have added just about everything to it but i am stuck on this one issue. I want to find a way to get cold air to my intake..i have three options i would like you guys to tell me what you think is the best bet.

1. I can try to build/buy some sort of cold air intake and route it to my fender well or to the front using one of the fog light housings.

2. I can go and pick up a Ram Air hood scoop or another form of forward facing hood scoop.

3 or i could try the cowel Induction hood scoop

out of my above three options what do you think will work the best?

If your going to use it for mainly drag than I would go with the ram air. On the fact of it forces more are in. If you used it for
mainly street than I would go with the cowl induction. The lower speeds you pull in more fresh cooler air with the cowl. So in my
opioning its a matter of what it will be use for the most.

Here's what I did on my 77 Mustang. It wasn't too hard to make up. A stock air cleaner had a second snorkel added and the ducting to the grill were stock units (the factory V8 on the right and a factory V6 duct on the left). The hose was over the counter at a parts store.

For street driving in the rain a foward facing scoops or a set up that picks up air directly from the grill (my intakes are offset to the side of the grill opening) is not really the hot ticket. At a minimum water soaked air filters get old real quick or worse case you could hydraulic the engine.

What i did on my cutlass was run a second intake on the other side of the radiator. Routing it around the charchol canister, and stealing another wedge from a junkyard. Really cleaned it up at high throttle. And, it looks factory-ish.

drg84 do you have a photo of your setup? can you some one please explain to me how cowel induction works? This scoop opens towards the wind shield they say the air comes off the windshield into the engine comparment...i visulize a car with air rushing over it and i can see it comming up over the hood then up and over the windshield but i cannot see it going back down the windshield into the cowel scoop someone please explain it to me

I have an 81 Z28.What I did was take a hood from a 79 Z28 and cut the openning out under the scoop then took out the insert in the scoop. my air filter is right behind the now open 79 scoop. only problem I have is that my hood is not setting right, do to the fact that my filter hits the bottem of the hood scoop.

cool thanks cyber smoke

Cowl Induction Hood - How It Works...
Air glides over the cowl induction hood.
It then hits the base of the windsheild, creating a low pressure area, allowing the hot air to escape from the engine compartment.

Uhhh, Streets . . . I don't think so. Whoever put that on the PTeazer site flunked his fluids class. A VENTED cowl induction system will do what they say, but one of the old GM-style units operates on a different theory. The only excuse the PTeazer folks have is if the scoop opening is sufficiently far away from the windshield to create a siphon effect. The windshield doesn't have anything to do with their idea.

A vented cowl hood looks like a cowl induction hood from the 1960's but doesn't do the same thing. Cowl hoods like those on late 1960's Z28s were used to make more horsepower. Vented cowl hoods are designed to allow cooling air an easy escape path, allowing the engine to run cooler and possibly increasing stability by reducing the high pressure area under the nose of a car. The old cowl induction hoods used raised center section that ran back to the base of the windshield. Instead of having the opening on the front of the hood scoop, it was on the back. This allows the carb to pull its air from the relatively high pressure area at the base of the windshield, providing a very mild passive supercharging effect and possibly a few more horsepower. When a moving gas like air is brought to a halt, there is an attendant rise in pressure (the kinetic energy is converted to static pressure).

Bernoulli's equation illustrates this:
P + (rho*V**2)/2 = constant
where:
P = air pressure
rho = air density
V = air velocity

When you decrease the air velocity, pressure must increase to keep the quantity a constant.

Darkster . . .

Cowl induction is a rear facing scoop at the base of the windshield. (Cowel is that guy on American Idol, I think.) It works because the base of the windshield is a high pressure area. The car is trying to change direction of the air and force it over the top of the car. If there's an opening going to the carb, the air will go that direction. It's not "coming down the windshield" as you suggest. It's coming across the hood. When it hits the windshield, the velocity decreases, so the pressure must go up, not down. It's a very efficient way to get outside cold air to the carb.

Of course, you need the proper air cleaner, and a way to seal it to the inside of the hood.

- and is it necessary to turn every question into a poll?