MikeD91convert

I have acquired a cowl induction hood, for my 91 convert. I am looking for info of how and what system operated the flaps Induction circuit. also what year and models they were installed on? I found in scrap yard.

Confuzed1

iTrader: (4)

If you post this on the CFI board, I'm sure they could tell you how the flaps are actuated on a CFI car....which is what they were found on. Vacuum - but not sure from where...

RedLeader289

iTrader: (2)

Just for your information, that is not a cowl induction hood. Though I'm not sure of what it was actually named. Not trying to be a tool, just passing on some info.

MikeD91convert

No your just uninformed. Please forward your reply to Classic Industries and GM sorry General Motors. This hood is also referred to as Ram Air. maby before you make a comment you do some reading. I did mine I made it real easy put mouse on next sentence. then tell Classic Industries they are wrong.......
http://www.classicindustries.com/pro...arts/cfh6.html
http://www.classicindustries.com/pro...ts/b12104.html

MikeD91convert

Thank you very much, this one is electrical. I am wondering if these are OEM or Aftermarket.
I found these to be on 1969 Camaro's, there was not a lot of info on internet about electrical diagrams without purchasing a book's. And on 69 does no good for a 91 .
Again Thank's

willexoIX

Ram air takes air from the front. Cowl induction takes air from the back so no, they are not the same. You have a ram air style hood, not a cowl hood.

Ram essentially (note choice of words) means force, another words forces air in from the front. Cowl, well that is self explanatory, because the opening is located at the cowl area.

Do you always believe what you read on the internet? Sincerely not being a dick here, but sometimes even the big companies can get it wrong.

MikeD91convert

As I learn more and more WIKI breaks down the Engineering of the Cowl induction for the one's that are unsure.
Scoop design[edit]

To be effective, a functional scoop must be located at a high-pressure area on the hood. For that reason, some functional scoops are located at the rear of the hood, near the vehicle's cowl, where the curvature of the windshield creates such a high-pressure zone, and may be placed so that their opening faces the windshield (a reversed scoop).

The scoop will be most effective if it is either mounted high enough to clear the boundary layer (the slow-moving air that clings to the surface of a moving object) or if it is a "NACA duct," mounted below the surface and designed to draw the faster moving air outside of the boundary layer into the duct. A shallow scoop that is not a NACA duct may not admit a useful amount of air even if it is open.

Under the hood, an effective scoop must funnel air into the engine's intake in as short and direct a path as possible, preferably through a tube or channel that is insulated against underhood heat.

A scoop may be part of the hood, or may be part of the engine's air cleaner assembly, protruding through a hole cut into the bonnet. Such a scoop is called a shaker hood, because the scoop vibrates noticeably when the engine is running, especially under power.

My apologies to readers that understand what cowl induction is. For the one that questions Camaro at heart go back to ford

willexoIX

That article explains what a scoop is. Cowl induction is called Cowl induction because the location of the opening is at the cowl, facing backwards.

Ram air is called Ram air because the opening faces forward to "Ram" the air into the opening. If you ask me that article does nothing to explain the difference between the two.

You have a Ram air hood. Period. It is not the same as a Cowl induction hood. Period.

Any university or college warns everyone to never use Wiki as a reference on a paper, and they will fail you if you do. What does that say about Wiki? ANYONE can edit the articles and post misleading or downright false information, so I would use it with a grain of salt.

As for your hood. Its probably a 12v solenoid to open or close the flaps. Not sure if it needs a relay or not but if you want to do it simple, use a switch with a relay. I dont know anything about how the CFI hood flaps are activated but I am sure there is more than one way to wire it up and make it functional.

And as for the ford comment, do you want to learn or are you just here to argue and talk ****?

Unsubscribing. Good luck with your hood.

Joe Tag

iTrader: (4)

You really should get a little more education under your belt before you try schooling a 6 year member on something that is common knowledge around here. He was trying to help you out and never questioned anything Camaro. Most of us have lived through the era of these things being factory accessories.

RedLeader289

iTrader: (2)

They are calling the first hood you linked a ram/cowl hood, because it appears to be dual purpose.
The second hood is a cowl induction hood (because the opening is at the rear of the raised portion, at the cowl).

That article is talking about scoops and function. I know what cowl induction is. I have an 83 Z28 that came from the FACTORY with the hood that you currently have(and mine is fiberglass). I still have that hood in storage and the flaps are functional. The hood on my car now is a cowl induction hood, made by goodmark (a GM licensed company).

Welcome to TGO. I was only trying to help, but in order to be helped one has to first be willing to admit that they might be wrong.

Good luck getting your flaps to work.

Classic1

I know a little about these hoods.

GM Part # was 14047995.
GM calls these a "plastic hood". They are more commonly referred to as a functional Cross-Fire Injection hood. Original GM part # was 14019569 which superseded to part # 14047995 in April of 1989.

14047995 fit 1982 Z28 models with 5.0-7 engines, and 1983 Z28 with Cross Fire 5.0S engines.

GM discontinued this hood and recalled cars with the hood due to a hydrolock problem. When it rained or when people washed their cars, the scoops acted as a canal and water poured into the intakes causing the engine to fill with water and hydrolock. GM replaced the hood under the recall with part # 14047994 plastic non-functional hood.

1407994 was a non-functional "plastic" version of the hood. It looked exactly the same except that the induction holes were not cut out. This was done to eliminate the Hydrolock issue. Ironically, this replacement non-functional hood was also part of a recall due to a delamination problem where the outer skin would delaminate from the inner frame and blow off the cars at high speed, blocking the drivers view, taking out windshields, etc. The hood on the recalled cars were replaced with a new steel version, part # 14069174 which superseded to GM part # 10107855 in July of 1990 and became discontinued by GM in 2002.

The steel reproduction of the 14069174 hood is no longer manufactured due to the tooling being damaged in August of 2011. But, a reproduction of the non-functional "plastic" hood is available, manufactured in lightweight, but heavy duty fiberglass construction.

Our part # is 14047994 for anyone who likes the look of this hood and is looking for a quality lightweight replacement hood without the worry of the hydrolock, or delamination issues that the original hoods suffered from. Hope this information helps.