Hood scoop to big?

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Can everyone please step back and remember everyone has different tastes and the OP asked how to install the Hemi scoop, not should he.
The title of the thread suggested that he wanted some input as well "Hood scoop too big?".....Or at least that's the way I read it.
 
Interesting to bring in aerodynamics of a particular hood scoop design on a car that is otherwise shaped like a brick LOL. Remember, the very next year after the 1968 Hemi scoop was the introduction of the Dodge Daytona Charger because the grill was catching too much air in Nascar lol. I agree that Mopar did all the R&D to set up these cars to do any type of racing available back in the day, and is invaluable. But for this application looks are more important than speed and it isn’t stealing that much horsepower thru the air to hurt the seat of the pants dyno in my Duster, so it’s perfectly fine. Can everyone please step back and remember everyone has different tastes and the OP asked how to install the Hemi scoop, not should he. His decision to use the scoop was made, now he wants it to function and not fly off. And last I checked Mopar had and installation guide for that too.
Just because his car and most cars of that era are shaped like a brick doesn’t mean it can’t be made worse and that scoop will.

It’s kind of like rubbing salt in a wound after you already rubbed dirt in it, just my opinion.

And that’s what he is looking for, opinions.
 
The title of the thread suggested that he wanted some input as well "Hood scoop too big?".....Or at least that's the way I read it.
Yes, that’s what I was asking. Is it too big? Is it going to hurt my performance is what I was getting at. If it does not make that much of a difference and I won’t have to be tuning my carburetor to get it to run right then I’ll run it.
 
That scoop will do ZERO for power. It also won't cost any power.

I don't know how Chrylser figured that scoop was a drag. That thing is too low and too far back to catch any air.

WJ was promoting the "mail box" nonsense while he was whining for EFI. He was wrong about the scoops.

When correctly sized and placed, the scoop is a net power gain. You lose some from drag but you gain from cool, fresh, pressurized air.

Almost every 60's and 70's scoops I've seen, hell even the stuff in the 80's is too small and too low with an opening that's too big.

If you like the looks then use it. As far as performance goes, there is little benefit to a scoop like those.
 
To the op.. I have always bought a second hood or part to do modifications to so if all goes wrong....
In this case I'd buy a fiberglass hood to pin on and put scoop on and tall air cleaner...
Attach the 4 pins with bolts (don't weld on..).
Paint both hoods and you have the best of both worlds...:thumbsup:
Change in an hour...
 
No such thing as too big a hood scoop.
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:lol:
 
Ok, the long awaited hood scoop install photos. The scoop itself is centered left to right on the hood, while the 18.5” hole in the hood is offset like the engine. The center of the hole measure out to be the center of the air cleaner stud. Any gaps are from the prior installer cutting the scoop lip off uneven, I opted not to fix that, but used rubber edge molding on it.

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I'd place two more bolts evenly spaced from center on either side.
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I appreciate the input and I had seen that as the more proper install but prior to this picture the center bolt had no sleeve and therefore the scoop was flexing down and cracked. I sleeved the center bolt and firmed up the install. I checked for flex after and found no issues so opted to run it as improved. The scoop and car is not a pristine example so if more damage occurs I will just fix it.
 
I appreciate the input and I had seen that as the more proper install but prior to this picture the center bolt had no sleeve and therefore the scoop was flexing down and cracked. I sleeved the center bolt and firmed up the install. I checked for flex after and found no issues so opted to run it as improved. The scoop and car is not a pristine example so if more damage occurs I will just fix it.
No worries. I hope you checked for flex at speed. That will break apart. Good luck.
 
No worries. I hope you checked for flex at speed. That will break apart. Good luck.
It was checked at speed before repairs and sleeving the center bolt and after all that was completed and it did not break apart before or after. And if you end up being right later, whatever… the scoop owes me nothing and it would be opportunity to change things up, but I am sure it will be just fine.
 
No worries. I hope you checked for flex at speed. That will break apart. Good luck.
I’m going with bolt type and a sleeve it’s not super straight in the front. Three of those should be solid
 
Yes that’s what I was getting at. So it won’t take away a measurable difference in seat. I will try to find instructions on the hood. I am putting in hood pins. Thanks everyone. I think I will remove the 1” spacer it’s pretty close if not up against hood now when fully shut. There is a witness mark where bolt for air cleaner top goes. I’m still not clear on if mounting in the front or back or whatever I think looks better.
Enter it over top of the witness mark of the carb stud. Kim
 
My buddies Charger, in progress, several years back. Car was built in my two stall garage. Turns out this much scoop was necessary.
Frankly, I liked the little one on my car better.
And for what its worth...... everytime I sealed the carb to the hood scoop, it slowed down. (Both cars, three different inductions).

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I would mount the scoop facing the windscreen; it gets high pressure air & it takes what it wants, not what is forced.
The percentage HP gain from ram [ forced ] air is very small; only about 1.2% @ 100 mph.
The HP gain from the colder air v the hot under hood is noticeable...& free! And at all rpms/speeds.
Dropping air inlet temp [ & increasing the mass of the inlet air ] is worth about a 1% HP increase for every 6*F drop in inlet temp. Free hp. If you can drop the temp 30*, that is a 5% HP increase. It also helps to prevent detonation. I have aluminised fibre glass cloth covering my air cleaner & air box assy to keep the air even cooler.
 
You say it was checked at speed, which is fine and probably it was only a few trips. Just think about how things are going to fatigue when it's driven for long periods of time at highway speeds. My 80's Pro Stock hood scoop was bonded and riveted to my glass hood. After about a year of sporadic 1/8th mile racing, it began to separate and pull the heads of the rivets through the lip of the scoop. I bought another glass hood and scoop. I had the back of the hood cut so the lip of the scoop was on the under side of the hood. That was approximately 8-9 years ago, there have been no separating of the hood and he scoop. The air entering the scoop will try to peel the hood or scoop off. You can run it anyway you wish, but there has been some good advice offered to you here.
 
You say it was checked at speed, which is fine and probably it was only a few trips. Just think about how things are going to fatigue when it's driven for long periods of time at highway speeds. My 80's Pro Stock hood scoop was bonded and riveted to my glass hood. After about a year of sporadic 1/8th mile racing, it began to separate and pull the heads of the rivets through the lip of the scoop. I bought another glass hood and scoop. I had the back of the hood cut so the lip of the scoop was on the under side of the hood. That was approximately 8-9 years ago, there have been no separating of the hood and he scoop. The air entering the scoop will try to peel the hood or scoop off. You can run it anyway you wish, but there has been some good advice offered to you here.
The hood and scoop together and independently are both basically trashed condition wise at this point. The hood is wavy, bracing beginning to separate in places. The scoop is trimmed poor, major chunk outs filled in. So I am in no way concerned. If I could tolerate the cost of a new one piece fiberglass hood with scoop molded in, I would, but since I could not, I spent a few days and $100 in material to sand/repair/spray paint/upgrade hardware on the the hood and scoop that is here. I drive the car and it’s fine. I respect all the good advice offered on it, but how the hood scoop is mounted is still the least concern on the car, compared to the rest of the body work needed on it eventually… I spent a little time and redid the install to be better than before and left it at that.
 
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