Effectiveness of hood scoops
Effectiveness of hood scoops Considering it's going to be on a car that's naturally aspirated, no turbo or supercharging (yet), and definitely no nitrous, are functional hood scoops effective, or is it more just a cosmetic thing?
This definetly isn't advanced tech material, but... From what I've read and remember from watching pro mod drag racing their scoops are worth a few tenths in the quarter mile alone.
i agree with grimes, a "functional" hood scoop has the greatest benefit of providing colder more dense air and that is where the power increase comes from, not from ram air (pressure increase) effect.
I don't rememeber off top of my head exactly and you can probably google it, are graphs showing relative power increase as air temperature drops. And there have been graphs also off what the speed would need to be to for air pressure increases (ramming affect) and it was something ridiculous, like +0.1 psi was over 100mph. The power vs air temperature graph was much more reasonable and practical when considering 130F vs < 80F intake air, so for 95% of us there is no ramming affect it's all a cold air advantage.
also worth mentioning for a real functional scoop which would be large is the ability to simply allow a large volume of air to get into the engine, versus having the engine to pull it through a restrictive air box and piping.
I don't rememeber off top of my head exactly and you can probably google it, are graphs showing relative power increase as air temperature drops. And there have been graphs also off what the speed would need to be to for air pressure increases (ramming affect) and it was something ridiculous, like +0.1 psi was over 100mph. The power vs air temperature graph was much more reasonable and practical when considering 130F vs < 80F intake air, so for 95% of us there is no ramming affect it's all a cold air advantage.
also worth mentioning for a real functional scoop which would be large is the ability to simply allow a large volume of air to get into the engine, versus having the engine to pull it through a restrictive air box and piping.
I found a hood with a scoop (cowl induction-style) that I, initially made a cardboard mockup of, and, lo and behold, someone on one of the other forums pointed out Harwood makes one that's very close to what I'd just designed.
Here it is:
http://www.eharwood.com/catalog/prod...?productID=400
Only thing I need to do is to configure the necessary plumbing to route the air to the lid/throttle body.
Here it is:
http://www.eharwood.com/catalog/prod...?productID=400
Only thing I need to do is to configure the necessary plumbing to route the air to the lid/throttle body.
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Joined: Jun 2006
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From: Nashville, TN
I found a hood with a scoop (cowl induction-style) that I, initially made a cardboard mockup of, and, lo and behold, someone on one of the other forums pointed out Harwood makes one that's very close to what I'd just designed.
Here it is:
http://www.eharwood.com/catalog/prod...?productID=400
Only thing I need to do is to configure the necessary plumbing to route the air to the lid/throttle body.
Here it is:
http://www.eharwood.com/catalog/prod...?productID=400
Only thing I need to do is to configure the necessary plumbing to route the air to the lid/throttle body.
