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.
Hood scoop to big?
- Thread starter hwy2
- Start date
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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.
Wvbuzzmaster
Well-Known Member
I believe that was clever click bait to get us here to talk about what it takes to install the scoop.
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.
Newbomb Turk
Well-Known Member
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.
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.
j par
Well-hung Member
I like the fender skirts...
And of course the headers cut off and bolted to the hood...
j par
Well-hung Member
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...
Change in an hour...
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...
Change in an hour...
No such thing as too big a hood scoop.
j par
Well-hung Member
Wvbuzzmaster
Well-Known Member
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.
I'd place two more bolts evenly spaced from center on either side.
Wvbuzzmaster
Well-Known Member
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.
Wvbuzzmaster
Well-Known Member
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.
It an old Super Stock scoop. I would say race only or street when the sun is shining. It would suck in a lot of water in the rain.
Enter it over top of the witness mark of the carb stud. Kim
33IMP
Well-Known Member
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).
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.
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.
Daves69
Well-Known Member
............
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.
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