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Hood Scoop and Gas Mileage

Discussion in 'Performance and Tuning' started by ShockDoc, Jun 15, 2008.

  1. Jun 15, 2008 at 11:31 AM
    #1
    ShockDoc

    ShockDoc [OP] Member

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    Do you guys think the hood scoop on the TRD sport affects gas mileage? I hear people on here talking about gas mileage and I am always impressed with their numbers. Anyone with a sport notice the same?
     
  2. Jun 15, 2008 at 11:40 AM
    #2
    neontrail

    neontrail ✈ ✈ ✈ ✈ ✈ ✈ ✈

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  3. Jun 15, 2008 at 6:34 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    ALso, the location of the hood scoop is in a negative pressure area of the hood. If you were to open it up, air would flow out of it instead of into it. Next time it rains look at how the water moves on your hood. Let some water drops collect on it, then begin to accelerate. The wate droplets wont move until they are disturbed by a side wind, or until they all pool enough to slide off the hood. :)
     
  4. Jun 15, 2008 at 6:44 PM
    #4
    lsocoee

    lsocoee My hair is all natural Moderator

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    good point. However, if the hood scoop opened up to the intake, then air would definitely be drawn in there.

    Even if the scoop just opened up to the engine compartment, I think the air would still be going in there. The scoop is effectively a wall that forms a cushion of air around it. If there was an opening in the scoop, the air would have the ability to go down there, and you would probably not notice the water drops dancing around the scoop.

    In short, I bet the scoop very moderately affects the fuel efficiency. Your tire pressure has more effect than the scoop.
     
  5. Jun 15, 2008 at 6:52 PM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yes, but given the intake is in a negative psi. area of the hood, it may have a negative impact on the perfomance of the intake. Ideal "ram air" spot is the front of the truck, i.e. near the headlights, and grill.
    Tire psi definatly has more of an impact. But I dont think the scoop affects the frontal area of the truck. :)
     
  6. Jun 15, 2008 at 6:59 PM
    #6
    lsocoee

    lsocoee My hair is all natural Moderator

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    Well now I'm just going to have to go tape some strings to my hood. :p
     
  7. Jun 15, 2008 at 7:01 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    That may be a better test than my water drop method. :D
     
  8. Jun 15, 2008 at 8:31 PM
    #8
    Anthony

    Anthony San Antonio Detailer :)

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    my last fill up, i was a shade under 20mpg with mixed 75% city/25%hwy driving :D
     
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