Hemi hood scoop installed today.

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January 08, 2009, 12:09:17 AM

My decision on what scoop to install on my Dart was made today when I found a brand new Hemi scoop at a swap meet this morning for $100. Here is how I installed it.

Like an eager little kid, as soon as I got it home, I had to set it on the hood to see what it looked like. Grin

First I made a mounting stud and base outline with a piece of cardboard. I set the cardboard with the flat edge across the front of the scoop, i used a rubber mallet to pop the holes for the studs, then I cut around scoop and had a perfect outline of the scoop with stud holes.

I first found the center of the hood and the center of the air cleaner stud, I marked these on the hood. I then measure the scoop and the hood and found the side to side center, I marked these on the hood with tape and a sharpie. I then looked on the bottom of the hood to find out where the studs will fall. The biggest consideration was the four rear studs, I had to make sure that they were no farther forward than big underhood brace. I also wanted to make sure the air cleaner would be centered in the scoop when I cut the opening in the hood a little later.

I set the scooop template in place and located the rear edge 3 1/2" from the rear center. To locate the scoop straight and square across the hood I measured in 13" on each side of the rear edge of the hood and marked it on some tape. This is important because the rear edge is curved. I them measured forward from those marks and came up with 26" to the front edge of each side. This made the scoop square. From this mark at 26" forward of the rear I measured across the hood, then subtracted the width of the scoop, then divided that number by 2, I now have exactly how far frome each side of the hood the scoop was, I marked this on the tape. I taped the template in place.

Now I set the scoop on the template to make sure I liked it.

I likey! Grin

At his point I marked the centers of the studs with the scoop in place with X's to make sure the holes were accurate. I took the scoop off and drilled 3/16" holes in the center of each stud location, and down through the bracing below. (by the way I hit 8 of the 10 holesnthrough the braces) I then used a stepped bit to open up the holes top and bottom to 5/16". The front two holes I actually cut out to 7/8" since they came thorugh the center of the brace.

I also drilled a hole where I measure out where the air cleaner stud should be. How close did I get? WHen I drilled the hole, the drill bit went down and hit the center of the stud and created a divot in the stud.
Cheers

Yes, I know, please hold the applause until I finish!

Here is the finished product, I still have to cut the hole for the air cleaner. I am going to use a K&N X-stream 11x4 filter and make a baseplate with some foam so it can seal against the bottom of the hood.

looks cool. I want one now. I wonder if it would look okay on a Duster.

great write up thank you

Looks great. So when are you going to cut the hole?

I thought the Hemi hood scoops had the 2 steel bars that bolted on the front at the scoop to the hood?
Oh! and good job and info. on the install. Wink

good going on the purchase & install.

Looks great, I'm using a glass hood on my Demon with the Hemi scoop.

Ryan

Here is part II of the hood scoop install, fresh air. I figured that I have enough room between the braces to fit an 11" x 3 1/2" K&N X-stream filter. I will be making a baseplate with a seal to keep out underhood air.

If it was a fiberglass hood, I would have just cut a large round or oval hole, but for budget reasons, I am keeping the steel hood. I wanted to make it look neat, and not just hack up the bracing. I started by marking the hole I wanted to cut, I then drilled 3/16" holes in all the corners.

On top of the hood, I laid down some tape, then drew lines between all the holes.

I then cut the lines with my dremel tool and some extra large cutoff wheels. When I was done, it was time to take a shower because my neck and arms were covered with itchy metal grindings, I hate that stuff! I used some 120 grit sandpaper and a sanding roll on my dremel to clean up the opening.

NICE !

Good job, Bud..

All I can say is WOW o WOW oWOW.................................KIM...............

You gonna put the jailbars in it?

Yes, but they are goung to be black, on a black hood, with a black scoop. I found some black button head allen screws to use. I am probably going to make some out of aluminum rod, drill it, then tap it.

Quote from: flyboy01 on September 04, 2007, 11:00:11 PM

Sounds like a little bit of work, but that would be slick. Nice job Flyboy!

that would look cool on anything.......i like keeping the steel hood.......nice job!

Nice write up.
Just in time too as I have a hemi scoop on order to install on my 69 Dart.
You can look at this post http://www.bigblockdart.com/index.php/topic,21568.0.html as how I sealed the air cleaner to the hood. Cheap, cost me $3.

gt

Quote from: flyboy01 on September 04, 2007, 11:00:11 PM

Just get some brake line.

Quote from: loiq on September 05, 2007, 04:35:04 PM

Quote from: flyboy01 on September 04, 2007, 11:00:11 PM

Just get some brake line.

Not my style. Has to be nicer than that. If I had my way I would find some airfoil shaped stock and make it out if those. Hmm...just had a thought about where to get some.

Back in the day the super stock guys would cheat a little by putting longer jailbars in to open the scoop more. These days they have to be within spec.

Then the superstock guys found that the taller the scoop, the more it slowed them down. Now they actually lower the scoop for aerodynamic reasons.

Nice job! You dont want to know what I went through, and all I did was cut a hole!

Quote from: Hemi GTS on September 09, 2007, 07:42:31 PM

Nice job! You dont want to know what I went through, and all I did was cut a hole!

Sure, give the guy a blown Hemi and he thinks he is hot shit! moon

WJ wrote an article about hood scoops and his conclusion was that the opening had more to do with the performance because of the turberlance of the opening and the effects of the air going into the carbs and you had to be so far off the hood to get any gains.I read this acticle a few years ago and this is what I can remember.

The problem that I've had with my fiberglass Hemi hoodscoop is that the right back corner is stress cracking and he lift front corner is doing the same.I'm lerning how to do fiberglas work.
If you want to see the 3 bars on the hoodscoop go to myspace.com/womanatorjoe and scroll the pictures.
I know I should have my pictures resized and just post here

nice work ,that scoop really suits the car

Love the look of a Hemi scoop on a Dart, My son also is sporting one on his 70 Swinger.