Any performace gains with a cowl induction hood?

Discussion in 'Technical' started by Russ, Dec 27, 2004.

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  1. Russ

    Russ Found On Russ's Drive

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    I've been told that, With a Comet GT style scoop, the leading edge of the hood makes a hole in the air(negative air pressure) so no air gets pushed over the hood and into the scoop opening.With the cowl hood air is forced down the windshied towards the cowl. Creating high air pressure area. when you install a cowl hood the air continues into the engine compartment where an open stye air cleaner gets high pressure, cool air, not heated air from the radiator. My thought is: If there was a "high pressure area" in the center of the hood, and a gt scoop was mounted without cutting a hole under it to let the air out. The wind would rip the scoop off the car. I've never heard of anyone ever loosing a Comet GT scoop before.:huh:
     
    Last edited: Dec 28, 2004
    Russ, Dec 28, 2004
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  2. igo1090

    igo1090 Member

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    when we put a cold air inlet to the carb on my son's old street elim car it was worth almost 2 tenths and just under 1 mph consistently in the summer (less in cool weather). its always questionable how much if any effect the ram pressurization has, but for each degree of temp drop you gain 1 % horsepower. by taking air in that is not coming off the radiator you are becoming slightly quicker, but more important predictable ( hopefully). temp changes underhood can be difficult to predict, but proper use of a $10 temp gauge to note changes in the ambient air should make your car more predictable.
     
    igo1090, Dec 28, 2004
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  3. T.L.

    T.L. Banned

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    Seriously, the Grabber hood weighs less than the standard hood. I have no idea why...
     
    T.L., Dec 28, 2004
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  4. Maverick Man

    Maverick Man The Original Maverick Man

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    oh?

    does it have less supports under it or something?

    what does the grabber one weigh?\

    i'm about to weight the stock one and the fiberglass one as soon as it stops raining like cats and dogs over here.
     
    Maverick Man, Dec 28, 2004
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  5. littleredtoy

    littleredtoy Seth

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    From the factory, Comet GT hood scoops were all non-functional.

    Re: the air pocket and negative air pressure; At higher speeds
    my hood raises in the front a bit. I have adjusted it some, but
    I still see it pop up a little. Perhaps it is air pressure in the engine compartment
    and not the scoop raising the hood. As for negative air pocket, there has to be force to create that negative air pocket, and the force
    would push back and possibly up on the hood IMO.

    I have never seen the logic in the benefits of a cowl induction hood on any car.
    I like the look of them, and suspect that they look better than they perform.

    I'm like you Maverick Man, Why does the Grabber hood weigh less?

    Seth
     
    littleredtoy, Dec 28, 2004
    #20
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