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Thread: Interesting read on F1 air boxes

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    Administrator ucfbrett's Avatar
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    Default Interesting read on F1 air boxes

    From Racecar Engineering magazine.

    Technology explained: F1 airboxes & filters | Racecar Engineering


    Fun F1 fact:

    At the end of the straight at the Shanghai circuit where the car is travelling at close to 330kph with DRS open, the air pressure hitting the air filter will be close to 1,070 millibar – normal ambient air pressure is around 1,020 millibar. This means the engine produces around 5% more power – equivalent to 40 bhp – than at ‘walking speed’

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    Senior Member DutchOven's Avatar
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    interesting. Anyone know if they still use variable length intakes on the motors?
    -Kevin M.

    2010 Subaru WRX

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    Quote Originally Posted by ucfbrett View Post
    From Racecar Engineering magazine.

    Technology explained: F1 airboxes & filters | Racecar Engineering


    Fun F1 fact:

    At the end of the straight at the Shanghai circuit where the car is travelling at close to 330kph with DRS open, the air pressure hitting the air filter will be close to 1,070 millibar – normal ambient air pressure is around 1,020 millibar. This means the engine produces around 5% more power – equivalent to 40 bhp – than at ‘walking speed’
    Being generally clueless on such matters, I would actually have expected more. I must have been overly influenced by the old GM "Ram Air" muscle car hoods back in the day.
    ucfbrett likes this.

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    Administrator ucfbrett's Avatar
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    The location of most muscle car scoops made them more effective at gathering raindrops on the hood than ramming air. The rear-opening shaker and cowl-induction hoods worked as advertised as do the contemporary hood scoops on the leading edge of the hood or on the front fascia.

    Oh, and they work on F1 cars, too.

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    Sir flink
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    Quote Originally Posted by Loose Caboose View Post
    Being generally clueless on such matters, I would actually have expected more. I must have been overly influenced by the old GM "Ram Air" muscle car hoods back in the day.
    Yes, the ram effect is pretty disappointing.

    Aerospaceweb.org | Atmospheric Properties Calculator

    At 100 mph the "True Dynamic Pressure" is 0.0121 atmospheres (0.1775 PSI). 1.2% more power at best. But it doesn't show on the dyno so woo-hoo.

    The same number is applicable to your splitter - 0.1775 PSI on a 200 square inch splitter: 35 lbs downforce. (Assumes the underside is at atmospheric, which it surely isn't!)

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    NA Power, Every hour! andrewdruiz's Avatar
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    Quote Originally Posted by DutchOven View Post
    interesting. Anyone know if they still use variable length intakes on the motors?
    Nope. They got banned when they switched to the 2.4L engines.
    1994 RX-7 R2
    1990 Miata

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