SAAC Forum

The Cars => 1967 Shelby GT350/500 => Topic started by: MuPaSo on April 15, 2020, 06:46:16 PM

Title: 1967 Upper Scoop Cutout?
Post by: MuPaSo on April 15, 2020, 06:46:16 PM
Can someone post or send me a photo of the upper scoop showing the opening from the front that leads to the interior?  The scoops we purchased are solid and need to be cut to allow airflow into the interior along with applying the blackout.

Thanks
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 16, 2020, 11:39:24 AM
This?
Title: Re: 1967 Upper Scoop Cutout?
Post by: roddster on April 16, 2020, 12:19:08 PM
  Ah, the scoop cut out leads out of the interior, not into it
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 16, 2020, 12:25:41 PM
What do you want a picture of?

That is the cut out in the scoop.

Do you want a picture of the roof of the car? A picture of the exterior of the scoop? What?

Apparently, I don't understand what is being asked for. Me bad.
Title: Re: 1967 Upper Scoop Cutout?
Post by: S7MS427 on April 16, 2020, 12:34:44 PM
Quote from: shelbydoug on April 16, 2020, 12:25:41 PM
What do you want a picture of?

That is the cut out in the scoop.

Do you want a picture of the roof of the car? A picture of the exterior of the scoop? What?

Apparently, I don't understand what is being asked for. Me bad.

My guess is that he believes that these parts are scoops and doesn't realise that they are in fact "air extractors".
Title: Re: 1967 Upper Scoop Cutout?
Post by: Tired Sheep on April 16, 2020, 12:36:06 PM
I smell Eleanor
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 16, 2020, 03:36:18 PM
Quote from: S7MS427 on April 16, 2020, 12:34:44 PM
Quote from: shelbydoug on April 16, 2020, 12:25:41 PM
What do you want a picture of?

That is the cut out in the scoop.

Do you want a picture of the roof of the car? A picture of the exterior of the scoop? What?

Apparently, I don't understand what is being asked for. Me bad.

My guess is that he believes that these parts are scoops and doesn't realise that they are in fact "air extractors".

I don't know what he is asking for if my picture isn't it? Beats me but tell me what pictures you want and I'll see if I can help?
Title: Re: 1967 Upper Scoop Cutout?
Post by: MuPaSo on April 16, 2020, 08:46:07 PM
Thank you, no not an Eleanor, but trying to stay as true to a GT500 as we can. Here are pictures of my scoops (air extractors)  :) This is how it came back from the body shop and I don't believe it's correct. Have been searching for pics but can't seem to find this angle. This is from the front looking inside.

Other than the holes they are solid from the front. I've been told there should be a slit cut Instead of the holes and they should be blacked out but I can't find a photo reference.

Thanks!
Title: Re: 1967 Upper Scoop Cutout?
Post by: The Going Thing on April 16, 2020, 08:57:16 PM
You'll love having all that water in your vehicle the first time you get caught in a downpour if you leave them like that. Free suggestion. Take it back to the idiots that put the holes in the front of the scoop and have them fiberglass the holes they drilled closed.  It may be difficult to get them to look as they should after the repairs.
Title: Re: 1967 Upper Scoop Cutout?
Post by: S7MS427 on April 16, 2020, 09:18:36 PM
Just to be clear about this, the air extractors are designed to let air out of the back of the "scoop".  They aren't a scoop at all.  The reason for their existance was to provide product identification between the new for '67 Shelby GTs and the all concuring '66 LeMans GT40 Mark II,  Those had four scoops on the sides (two per side).  So if the Shelby had four scoops, by God, it had to be fast!
Title: Re: 1967 Upper Scoop Cutout?
Post by: MuPaSo on April 16, 2020, 09:22:45 PM
Thank you for the replies, so I'm clear then there is no opening at all from the front then, just the back.

Does anyone have a photo showing how the blackout is applied?  If I'm going to have them reworked I'd like the paint finish to be correct this time.

Thanks!
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 16, 2020, 09:32:32 PM
There is no slot in the front. The inner and outter just don't touch. It must be in the order of 1/8" space.

It works on the venturi principle like a carburetor does.

The black is applied to the front (this one doesn't have it applied yet). You tape the edge and spray black in. There should be no black on the edge or exterior.
Title: Re: 1967 Upper Scoop Cutout?
Post by: tesgt350 on April 17, 2020, 07:55:32 AM
Quote from: MuPaSo on April 16, 2020, 08:46:07 PM
Thank you, no not an Eleanor, but trying to stay as true to a GT500 as we can. Here are pictures of my scoops (air extractors)  :) This is how it came back from the body shop and I don't believe it's correct. Have been searching for pics but can't seem to find this angle. This is from the front looking inside.

Other than the holes they are solid from the front. I've been told there should be a slit cut Instead of the holes and they should be blacked out but I can't find a photo reference.

Thanks!

What about these two holes?  Should they be filled in as well?
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 17, 2020, 08:11:00 AM
Yes. No holes. Run a feeler gauge through the venturi opening to make sure it isn't blocked.
Title: Re: 1967 Upper Scoop Cutout?
Post by: oldcanuck on April 17, 2020, 08:54:02 AM
.... or in layman's terms, it creates a vacuum to suck the hotter air out of the interior of the car...... Didn't Carroll say.... " The faster you drive, the better it works ! "
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 17, 2020, 09:19:36 AM
I think of it more as a cigarette smoke extractor.

I couldn't confirm that it actually works one way or the other. I will say that it is quiet and not noticeable BUT the engine makes so much racket to begin with, who would notice a little whistling.

When I'm on the track, the '68 Shelby hood, combined with the KR ducting and Weber carbs has a very noticeable whistling at speeds over 100. Everyone who heard it came over to see what was going on with the hood open.

Mostly it's the Webers but that nostril in the 68 Shelby hood when functional sings some kind of song as well.

I guess to a bystander it kind of sounds like one of those one man band set ups? BUT nothing from those extractors, AND the brake scoops although "mis-titled" do provide a source of cooler air into the rear wheel wells when the tire is rotating.



Title: Re: 1967 Upper Scoop Cutout?
Post by: MuPaSo on April 17, 2020, 10:08:57 AM
Thanks again - for the lower scoop is the blackout treatment the same - outward facing opening edge taped off with everything behind that black (assuming I have that stated correctly).  Also - is the blackout solid or heavier in the front and more of an over spray towards the back - hope that makes sense...
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 17, 2020, 10:36:35 AM
Coralsnake posted a couple of pictures of what the blackening looks like on a 68 with the scoop off.

Even though we are talking about two different years, the procedure is similar. Someone with a rattle can, shooting paint into the scoops until you don't see anymore body color.

I redid both my 67 and 68 in that area to my own liking. I don't like drips and runs. I just made it look more professional.

The way both factories did it, it just makes the black out look like an afterthought and a chicken soup solution but the black outs on the brakes looks worse. Those were done with a brush probably right over the flash rust already on the brake drums?
Title: Re: 1967 Upper Scoop Cutout?
Post by: roddster on April 17, 2020, 12:14:14 PM
  The next question will be: Flat, satin, semi-gloss, or gloss black paint inside the scoop?
    Runs from satin to semi-gloss blass
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 17, 2020, 12:34:05 PM
Quote from: roddster on April 17, 2020, 12:14:14 PM
  The next question will be: Flat, satin, semi-gloss, or gloss black paint inside the scoop?
    Runs from satin to semi-gloss blass

I think it was originally intended to be flat? Depending on how well the can got shaken depends on if it has any gloss or gloss at the top of the run and not at the bottom.

Do you want to be that accurate? Maybe have a couple of beers before you start and need to take a wicked piss to simulate the original attitude of the painter?
Title: Re: 1967 Upper Scoop Cutout?
Post by: davez on April 17, 2020, 06:32:14 PM
Here is the front of my original paint car upper scoop
Some of the black remains
Title: Re: 1967 Upper Scoop Cutout?
Post by: S7MS427 on April 17, 2020, 07:08:22 PM
From Chuck Cantwell and Greg Kolasa's really excellent Shelby Mustang GT350 book, Chapter 12 (pages 147 and 148), in reference to the GT40 inspired upper "scoops" that were being designed by Charlie McHose for the upcoming '67 models:
McHose liked the form of those scoops, but he wrestled with their function for the Mustang: They were designed to push in cooling air for the brakes, while McHose wanted to pull air out of the Shelby's cockpit. He and I discussed his concept, and I thought of integrating a venturi into the inside of the scoop, to help draw air out of the passenger compartment.  The theory sounded good, but we needed to test a mock-up. He, Joe [Farrer], and Carl [Nasson], developed a prototype scoop that we attached over the opening where S FM 6S800's quarter window used to be. I got behind the wheel, Charlie got into the backseat and lit up a cigarette, and we drove past a bystander who confirmed that yes, as the car passed by,there was indeed cigarette smoke coming out of the rear of the air scoop. It wouldn't suck your hat off inside, but it did provide enough airflow to be functional, so those Mk II inspired air extractors (as he called them) became an integral part of the 1967 Shelby Mustang styling package.

And now you know. So, no holes, no slots in the front of the scoops. If you are at all interested in the design and development of the early Shelby Mustangs, pick up a copy of this informative book. I highly recommend it.  If you want to know who Charlie, Joe, and Carl were, you'll just have to buy the book.  Suffice to say that they were integral to the styling of the new for 1967 Shelby models and worked magic to create one of the most distinctive looking cars in automotive history.
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 17, 2020, 08:12:27 PM
I always suspected it was just a cigarette smoke extractor?

It isn't closed from the front though. Take an air hose and blow it into the front. You will feel the siphoning effect it has on the small interior opening.

It's a clever design. It's maybe a good thing it was never called a McHose?
Title: Re: 1967 Upper Scoop Cutout?
Post by: S7MS427 on April 17, 2020, 08:56:58 PM
Quote from: shelbydoug on April 17, 2020, 08:12:27 PM
It isn't closed from the front though. Take an air hose and blow it into the front. You will feel the siphoning effect it has on the small interior opening.

It's a clever design. It's maybe a good thing it was never called a McHose?

Well yes there has to be some small opening to pass air in order to allow the thing to operate as a venturi. That's where the inner part of the extractor meets the outer part. There just aren't any drilled holes or cut slots.

McHose?  Ouch!
Title: Re: 1967 Upper Scoop Cutout?
Post by: shelbydoug on April 18, 2020, 07:42:38 AM
Nothing like the scientific method of testing? Good thing they didn't do the toilet paper tuff test?
Title: Re: 1967 Upper Scoop Cutout?
Post by: The Going Thing on April 18, 2020, 12:32:30 PM
Quote from: shelbydoug on April 18, 2020, 07:42:38 AM
Nothing like the scientific method of testing? Good thing they didn't do the toilet paper tuff test?
Now that would have been just shitty, Doug...