Ok, I thought this would be worth comin back to post . Don't think I will have both scoops at the same time again !!! Below are some Pics of both Original Mustang scoops normally used on the rear decklid. Good oppurtunity for those who wondered what it looks like. Question is which one do you think looks the best ?
I like them both only input I can give is the Gray primered one is easier to install.
Please, everyone post your opinions !!!

I like they grey one (and I have the red one!)

Hartz

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'84 SC 5.7L V8
'85 SE 3.1L V6 Turbo
Hartz's Toys

I favor the red one.

I've got the red one as well... and still prefer it (even with the more-difficult install).

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Looking for Fiero posters?

i like the red one

I have 2 questions concerning the rear deck scoop. I am not trying to put anyone down so bear with me and I will try to explain. I have a removable rear window so I am very aware of the wind currents on the rear deck. The wind on the rear deck blows forward towards the rear window. So my first question is wouldn't the air blow into the scoop instead of extracting the air out of the scoop. Has anyone done a test on this? (tape paper strips to the scoop edge and drive) Second question - I have seen many Mustang type scoops installed on the Fieros. This type of scoop has very few square inches of actually opening. I would guestimate about 24-30 square inches. This would not be a problem if there was ram effect like on a front hood but would be very inefficient if you are depending on breezes to extract heat. I have asked a few people about this and their response is that they just think the scoop looks cool. If that is the reason to put them on I totally understand that but if people are putting them on to cool the engine compartment I think they might be fooling themselves. So my second question is why do people put the Mustang type scoop on. Looks or efficient cooling? I too put a vent on the trunk but the one I have has 132 square inches of opening. Please no flames I just am curious as to the motivation.

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Red 88 GT T-Top 3800 Supercharged
White 88 GT T-Top Stock
White 88 GT Stock

[This message has been edited by skitime (edited 07-31-2002).]

Personally, I like Skitime's decklid vent the best. But for an add-on scoop that can also give more engine compartment clearance, I like the Mopar 6-pack scoop. I believe Tina had(had?) one on her silver car. Looked really mean.

Skitime- I know we've discussed this a bit off-forum (via email), but I figure I'll just reiterate my thoughts for the others.

First off, I've never "wind" tested it (Maybe something to do at lunch today ). And the needle on my temp gauge hasn't been connected for quite some time- so I can't say for certain of any engine-temp changes (that and I've got the front hood vent releasing heat up there).

My engine ("warmed" 3.1L V6) produces a tremendous amount of heat (OK, not as much as Tina's V8, but still a lot). And I've noticed that after the car has been run for awhile, that you can very much feel the heat coming from the vent opening... so without airflow, it is releasing heat.

If the air were reverse-flowing into the deck scoop, I would assume that it's still supplying fresh air to the motor (more so than a solid/sealed deck). and air will still be released from the existing side scoops.

As to flow/area... without a fan, nobody says it moves a ton of air. But my scoop (shown above) has an opening of 21.5" x 1.25" which equates to 26.875 sq inches. Which is greater than 0, which is what the stock deck had. Something is better than nothing.

Oh yeah- and it looks cool too!

quote Originally posted by skitime: Please no flames I just am curious as to the motivation.

I'm putting one on the black GT just for cosmetic appeal (AKA I like it). If it manages to pull a little heat out of the compartment, bonus...

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87GT 5-speed * Ttop * Performance Sound *
87GT Automatic - 3.4 in the works...

[This message has been edited by Haagster (edited 07-31-2002).]

Hey Skitime, I put mine on because I couldn't get the carb under the stock hump in the hood.

quote Originally posted by Tcat55371: Hey Skitime, I put mine on because I couldn't get the carb under the stock hump in the hood.

Good answer and it really does look cool. I did not consider the reason of needing more height.

Well on the 2.8 and my 3.8sc i have this to offer.
The "intake" is on the side and supplies the fresh air going into the engine. right? So that takes care of that. unless you have a different setup for the incoming air to the engine.ie a carb.
That is the whole reason for the old camaeros having the cowl INDUCTION. It went straight into the eng.

Now to have the rear scoop reversed, well kinda disrupts the air "flow". Remember that there is air coming from the front of the car also(underneith) which will come up through the engine compartment and out the vents on the side of the deck lid. So adding a scoop on the way most people are doing IS the right way. exhausting hot air and staying on the air "flow" out towards the back.
Of course the way Ski wants it is just like the old indys with the scoop coming up over the top of the car, but find out where the air goes into from there....the air cleaner??like on "normal" fieros. then I am back to the beginning of this letter

At least that is MY take on the subject !!

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Ok, good points all of you and well taken....but lets try to stick with the original question....which of the 2 scoops I posted do you think looks better. Not works better. Just simply looks better.

Thanks,

By the way both are for sell and you will find the details on my website this evening. The gray one is already listed and is the type I am swaying towards at this time (I have another one just like it that is Black)
The red one will be listed later.
http://www.diginostics.com/Fiero/fiero.html

quote Originally posted by skitime: The wind on the rear deck blows forward towards the rear window.

Skitime,
Hmm.. Interesting.... With the position that I have mine mounted in(see pic.) Do you think I would get the opposite?? I did the streamer test like you mentioned , That's why I moved mine where it sit's now... What does anyone think?? Will it flow better being at the rear of the decklid VS. the normal mounting spot..???

Also as you can tell I have not 'smoooothed' it in yet ... lol

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Under Construction.... Still!!

SmoothFieroGT@Yahoo.com
People from Texas that plan on going to the 20th Anniv. Show in Pontiac, Michigan July 17th-20th 2003 email me to coordinate the Texas Convoy up there at
"TexasFieroTrainToPontiacMichigan@yahoo.com"

[This message has been edited by Smoooooth GT (edited 07-31-2002).]

I vote for the grey one because it's not so squared off.

My vote is for the grey one because it looks smoother. I'm not a big fan of boxy contours, for the most part, and I think the grey vent would be cool if smoothed into the decklid.

*In response to Skitime's question, I would think the hood vent would be best for low/no speed traffic, when it would allow heat to rise when there is little flow otherwise. I've never done a streamer test, so I'm not sure how the rear decklid area responds to high speed air travel.

Bryce
88 GT

Interesting thread, I like the red one better.

The red one of course. Maybe thats because I have one like it on my Fiero, Mustang hood scoop.

The grey one

pic taken in poorer conditions, and the car wasn't that clean...

I was gonna throw a mustang scoop on just to protect the air filter from the elements, but it seems everybody is doin that, so I've left it alone for uniqueness I guess.

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[This message has been edited by JD86GT350 (edited 07-31-2002).]

I like the grey one better. It follows the coutours of the hood better (i.e. doesn't stick out like a sore thumb).

Regarding the airflow issue... I don't have a hood scoop on my car but I do have very open vent gratings. And I've had a chance to see how smoke flows out of them with engine oil leaking onto the exhaust pipe (not by choice, obviously).

The smoke rises up from the gratings, swirls around a little, and then makes a beeline for the back of the car. The swirl area doesn't extend very far back across the trunk, only about as far back as the ends of the gratings. So as long as your vent scoop's opening is behind the gratings, you should be fine.

Because of the aerodynamics back there, I'd rather have a grating in the hood than an extractor scoop. The aerodynamic forces create a low-pressure bubble behind the back window which will pull air up and out of the engine compartment when the car is moving. If you're really worried about engine venting, you can have a much larger ventilated area (and thus more airflow) using a grating as opposed to a scoop. Plus you're allowing the natural airflow characteristics to do their thing.

So all in all, I think JD has the distinction of having the most functional hood vent.

Oh, and did I mention that I like the grey scoop better?

[This message has been edited by Blacktree (edited 07-31-2002).]

1 more vote for the 79 mustang scoop

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Josh Pics of my cars

Join New England Fiero Association

Another vote here for the red scoop.

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Silver 86 GT
no truck, no trailer, no spray!

Originally posted by Blacktree:
Regarding the airflow issue... I don't have a hood scoop on my car but I do have very open vent gratings.....The smoke rises up from the gratings, swirls around a little, and then makes a beeline for the back of the car. The swirl area doesn't extend very far back across the trunk, only about as far back as the ends of the gratings. So as long as your vent scoop's opening is behind the gratings, you should be fine.

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I located my scoop outlets closer to the rear edge of the decklid. My functional side intakes (IRM) also help the hot air flow coming out the rear.

********************************************* http://hometown.aol.com/m34chev/zoomies.html

[This message has been edited by Bazooka (edited 07-31-2002).]

quote Originally posted by JD86GT350: pic taken in poorer conditions, and the car wasn't that clean... I was gonna throw a mustang scoop on just to protect the air filter from the elements, but it seems everybody is doin that, so I've left it alone for uniqueness I guess.

Howd you do that? I like it! kinda like what Skitime has underneath his window

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--Adam--
1987 Blue GT 5-speed
IM AOL: GTFiero

I like the red one

Here is a pic of my trunklid for comparision.

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Red 88 GT T-Top 3800 Supercharged
White 88 GT T-Top Stock
White 88 GT Stock

I like both but I'd take the gray.

I have the mustang scoop and all I can say about home much heat it puts out is this: In the winter, when the deck is covered in 3inchs of snow and you take her out for a spin, the only parts that arn't covered in snow when you return is the vents and a strip of the car, straight back from the vent. This includes the spoiler as well.

Look at the rear window on a Fiero. It's partially recessed which creates a low pressure area at the window when you're driving. It you had no window, air would blow in. Go back halfway on the rear deck and you lose this low pressure. Air flows normally there, towards the rear (although there might still be some turbulance). This is where you want your scoop opening. Additionally, hot air rises and will be forced out the top vents and scoop.