EVO-R FC3S RX-7 Vented Headlight Cover
12-23-05, 01:59 PM
#26
Does anyone of the people who "have installed a zillion of these things" on this thread actually realize that most of these things are meant to work when you remove the gasket on the hood. Air then passes over the headlight bracket, between it and the hood.
I like to drive my car in the rain thus i refuse to remove that hood gasket and thus these things dont work for me.
For a race application it would work great.
I like to drive my car in the rain thus i refuse to remove that hood gasket and thus these things dont work for me.
For a race application it would work great.
12-28-05, 04:40 AM
#27
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Anybody who really thinks headlight cover scoops are functional doesn't understand how much air an engine actually consumes. The stock airbox inlet is bigger than that scoop. If the engine needs more air that the scoop provides (and it does) then the air will be drawn from somewhere else, probably somewhere hot.
Of course at night it goes from being mostly useless to being totally useless...
Of course at night it goes from being mostly useless to being totally useless...
Last edited by NZConvertible; 12-28-05 at 04:43 AM.
12-28-05, 11:16 AM
#28
Originally Posted by RockLobster
Does anyone of the people who "have installed a zillion of these things" on this thread actually realize that most of these things are meant to work when you remove the gasket on the hood. Air then passes over the headlight bracket, between it and the hood.
I like to drive my car in the rain thus i refuse to remove that hood gasket and thus these things dont work for me.
For a race application it would work great.
I like to drive my car in the rain thus i refuse to remove that hood gasket and thus these things dont work for me.
For a race application it would work great.
Your wisdom and insight are greatly appreciated. Spending 5 seconds in front of a car wouldn't have told everyone this!
12-28-05, 11:54 AM
#29
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Yes but every little bit counts NZ if you add this then got a box built around your filter which has a duct running to an opening in the front bumper it will just help increase airflow again most of these things arent even that significantly noticable on the street but for race applications every little bit is necessary. I think the headlight duct is more of a cosmetic thing that you can pretend helps with air flow.
12-28-05, 12:51 PM
#30
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a guy i worked with had light scoop and we would see heat escape from it after he parked. perhaps its better suited to vent the heat out when the car isnt moving.
12-28-05, 01:21 PM
#31
IFO Forced Induction Slo
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Originally Posted by NZConvertible
Anybody who really thinks headlight cover scoops are functional doesn't understand how much air an engine actually consumes. The stock airbox inlet is bigger than that scoop. If the engine needs more air that the scoop provides (and it does) then the air will be drawn from somewhere else, probably somewhere hot.
Of course at night it goes from being mostly useless to being totally useless...
Of course at night it goes from being mostly useless to being totally useless...
12-28-05, 04:24 PM
#32
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Originally Posted by bigdv519
The air around the filter, in the engine bay, is simple exposed to cooler air, at moving speeds.
If that silly little scoop is the only way to get outside air to your intake then most of the air actually entering it will have come from somewhere other than the scoop, most probably the engine bay. Most of the air entering the engine bay comes through the radiator, i.e. it's hot.
12-29-05, 01:03 AM
#37
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Originally Posted by bigdv519
So, can you, from personal experience, say that there is no advantage to having a scoop?
Also, in science and engineering the onus of proof is always on those who say it does work, not those who say it doesn't. I've yet to see a single person (including sellers of this product) offer any concrete evidence of it's effectiveness. So can you, from personal experience, say that this is any more than a cosmetic add-on?
12-29-05, 01:20 AM
#38
IFO Forced Induction Slo
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Originally Posted by NZConvertible
I have enough experience with CAI's and knowledge of engines and fluid dynamics to know when something is obviously going to have only a minor effect.
Originally Posted by NZConvertible
I've yet to see a single person (including sellers of this product) offer any concrete evidence of it's effectiveness.
Originally Posted by NZConvertible
So can you, from personal experience, say that this is any more than a cosmetic add-on.
12-29-05, 05:38 PM
#41
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A couple years ago someone posted a graph of the FC that showed high and low pressure areas around the car, based on Mazdas wind tunnel testing. The car has a .31 CD drag coefficient, .29 on the sport models. The user was using the graph to show that the head lights, when retracted, are not in a pressure area that would promote air flow to the engine. I'll try to find it, but I'm with NZ on this one, this mod is only for aesthetics.
12-29-05, 06:42 PM
#42
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I found the thread it was in but the picture was linked to a site that no longer exist, so there is no picture, just a red X instead. The thread was talking about hood scoops on the TII, not the headlight scoops but in that thread someone mentioned that a scoop has to be tall enough to draw in enough air, since the graph was showing that most of the air goes over the hood scoop as air takes the path of least resistance. This would apply to the headlight scoop since the graph (which is not available now) showed the headlights in a low pressure area. Faster moving air creates lower pressure. The headlight covers are not in a position to be used as ram air scoops as they are flush with the hood of the car and don't extend out away from the hood like ram air scoops on aircraft. Aircraft use ram air to cool a variety of systems and components and the scoops that open up are not like louvers, they actual open or extend out into the airstream. (I'm an aircraft mechanic so that is my personal experience/concrete evidence) These headlight scoops are not tall enough to draw in air like a formula 1 car or top fuel dragster. These racing vehicles have intakes that are higher up away from the body of the car so they can draw in air that is not affected by body of the car.
Just my $.02
Just my $.02
12-15-11, 08:25 AM
#46
In the guys defense the amount of 'use the search button' warriors on here are going to force this to happen. So its one or the other?
A. bombard the newbs with 'use the search button' and accept that 6 year old threads are going to be bumped.
B. Allow new threads to be created for things that 'have been covered a million times' and stop preaching about the search button?
Can't have both my US freinds
A. bombard the newbs with 'use the search button' and accept that 6 year old threads are going to be bumped.
B. Allow new threads to be created for things that 'have been covered a million times' and stop preaching about the search button?
Can't have both my US freinds
12-15-11, 11:06 AM
#47
NZ is correct that it's more of an aesthetic upgrade than anything, but blowing a little bit of cool air on everyone's "cold air induction" pod filter is likely going to help a little. i knew this from the start when i fabricated my own, it's by no means a true cold air induction or ram air inlet.
and yes i know it's an old thread, **** it, im replying like it was posted yesterday.
Last edited by RotaryEvolution; 12-15-11 at 11:09 AM.
12-15-11, 11:56 PM
#49
In the guys defense the amount of 'use the search button' warriors on here are going to force this to happen. So its one or the other?
A. bombard the newbs with 'use the search button' and accept that 6 year old threads are going to be bumped.
B. Allow new threads to be created for things that 'have been covered a million times' and stop preaching about the search button?
Can't have both my US freinds
A. bombard the newbs with 'use the search button' and accept that 6 year old threads are going to be bumped.
B. Allow new threads to be created for things that 'have been covered a million times' and stop preaching about the search button?
Can't have both my US freinds
Its also why I never say "SEARCH", then when they bring up an old thread people will bitch and moan, and I sit back and laugh.
