Cold air induction box...
Thread Starter
Burning Brakes
Joined: Jul 2000
Posts: 1,045
Likes: 3
Cold air induction box...
I decide to make a cold air for my 1979 with a 383 SuperRam . I mocked it up with florist foam. After shaping it I covered it with 4 layers of fiberglass. Ive just gave a thin coat of body filler. Then Ill remove the foam and clean up the inside. The plan is to finish it with carbonfiber hydrographics. Ill find some type of seal, maybe C4 front wheelwell weatherstriping?
Burning Brakes
Joined: Mar 2012
Posts: 871
Likes: 73
From: Memphis Tennessee
I like it! I have an LT1 and plan on doing something similar. Might try and put an scoop in the front of the hood to feed it some fresh air. From the looks of that mesh in the picture, it kinda looks like you have one.
Any more pictures of that engine?
Any more pictures of that engine?
Thread Starter
Burning Brakes
Joined: Jul 2000
Posts: 1,045
Likes: 3
The ducts in the hood wont be able to feed cold air into the cleaner because they are right above the A/C compressor and the alternater. There just isnt any room. it should benifit from positive pressure from ahead of the radiater. The core support is sealed pretty good so im hoping it works out,,,
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Is this how you have been spending your time? I never got a response for my last message for a beer!! I guess I will have to bring a six-pack to your house and just supervise your project. LOL
Racer
Joined: Oct 2003
Posts: 424
Likes: 9
From: Killeen Texas
QUESTION: How good do you guys think the factory cold air induction system is onthe '81?
I was thinking of using the front two pieces of the factory system, then replacing the acordian tubes that went to the air cleaner w/ smooth either plastic or insulated sheet metal and making an air cleaner. Have prints f/ a very good air induction air cleaner that will receive the smooth tubes straight on.
I was thinking of using the front two pieces of the factory system, then replacing the acordian tubes that went to the air cleaner w/ smooth either plastic or insulated sheet metal and making an air cleaner. Have prints f/ a very good air induction air cleaner that will receive the smooth tubes straight on.
Advanced
Joined: Mar 2012
Posts: 68
Likes: 11
From: South Daytona Florida
I had a different approach to cold air intake on my '79. I decided to go with cowl induction. Of course, you have to be willing to cut a hole in your cowl. I was, since I can always fill it if I ever wanted to change it back(I don't think so!). It fits perfectly under the stock hood and works fantastic - all for $165 total! I have solid motor mounts, so engine torque isn't a problem. I have an Edelbrock 800 carb and Performer RPM manifold. I used Spectre parts - all polished aluminum 4 inch system - capable of at least 900 cfm flow. Parts: #9849 4" plenum, #9604 4" velocity stack, #9709 4" x 4" tube, #9749 4" 45 degree elbow, #9776 4" couplers(3), #4208 low profile air cleaner nut. A real increase in acceleration vs. my previous Edelbrock foam carb-top filter. I was shocked, I had no idea it would work as well as it does, especially when the engine gets warm! I have pictures, and will post them if I figure out how. I recommend this upgrade to anyone that can afford it.
Burning Brakes
Joined: Oct 2010
Posts: 1,160
Likes: 23
From: Prescott AZ
That sound interesting. Look forward to the pics.
I had a different approach to cold air intake on my '79. I decided to go with cowl induction. Of course, you have to be willing to cut a hole in your cowl. I was, since I can always fill it if I ever wanted to change it back(I don't think so!). It fits perfectly under the stock hood and works fantastic - all for $165 total! I have solid motor mounts, so engine torque isn't a problem. I have an Edelbrock 800 carb and Performer RPM manifold. I used Spectre parts - all polished aluminum 4 inch system - capable of at least 900 cfm flow. Parts: #9849 4" plenum, #9604 4" velocity stack, #9709 4" x 4" tube, #9749 4" 45 degree elbow, #9776 4" couplers(3), #4208 low profile air cleaner nut. A real increase in acceleration vs. my previous Edelbrock foam carb-top filter. I was shocked, I had no idea it would work as well as it does, especially when the engine gets warm! I have pictures, and will post them if I figure out how. I recommend this upgrade to anyone that can afford it.
Advanced
Joined: Mar 2012
Posts: 68
Likes: 11
From: South Daytona Florida
Here are more pics of my cold air intake system. First I'll show my old underhood Edelbrock filter:
And now the newly placed Cold Air Intake w/ Velocity Stack in the Cowl. True Cowl Induction!
Close-up of the Velocity Stack in the Cowl(cut 1/2" off of bottom of velocity stack for clearance):
As long as you have solid motor mounts, this system will clear the stock hood. All the parts are Spectre Performance stuff, and the whole thing costs less than $170!
I guarantee you will feel a very noticeable increase in power and acceleration - I sure did!
Also, it doesn't cover up half of your engine, like some of the over-the-radiator systems. And you really don't get cold air from the top of your radiator. That area runs nearly as hot as the rest of the engine compartment.
And now the newly placed Cold Air Intake w/ Velocity Stack in the Cowl. True Cowl Induction!
Close-up of the Velocity Stack in the Cowl(cut 1/2" off of bottom of velocity stack for clearance):
As long as you have solid motor mounts, this system will clear the stock hood. All the parts are Spectre Performance stuff, and the whole thing costs less than $170!
I guarantee you will feel a very noticeable increase in power and acceleration - I sure did!
Also, it doesn't cover up half of your engine, like some of the over-the-radiator systems. And you really don't get cold air from the top of your radiator. That area runs nearly as hot as the rest of the engine compartment.
Last edited by myohpe@gmail.com; Jan 27, 2013 at 05:34 PM.
Thread Starter
Burning Brakes
Joined: Jul 2000
Posts: 1,045
Likes: 3
I was able to clean out the foam today and found a couple thin spot that need re-enforcing. It looks like it should be pretty sturdy. Now I need to figure out how to clean the foam out so I can add some glass.
Advanced
Joined: Mar 2012
Posts: 68
Likes: 11
From: South Daytona Florida
The solid motor mounts keep the plenum(on top of the carburetor) from hitting the hood during acceleration when torque twists the engine. I had the solid mounts in place long before I decided to put this system in my car, but since clearance is limited between the hood and plenum, I would have added them if I needed to. I measured with clay on the plenum when I slowly closed my hood, and found I had about 1/4" clearance. I cut away some of the hood blanket where the plenum and pipes run, since it was squishing against the parts. It doesn't look bad though, in fact most people don't even notice it's cut. And it doesn't droop because there are retainer clips all around where it needs to be cut.
