i have a 84 TA with the stock cowl induction hood. it has the functioning cowl (the black thing with the motor that opens at WOT and lets air into the air cleaner..dont know what its called)...well i have seen many other cars that have these hoods, but after looking under the hood...i noticed that they are not fuctional. i was jsut wondering if the "functioning" part only came on certian cars equiped with a certian package. any insight?

 

yeah, i'm kinda curious about that too. i have a 90 formula with the "power bulge" cowl induction hood, but the whole thing is sealed. any way i can convert this into true cowl induction?

 

I know that 1982 LU5 (Twin TBI) cars got a functional hood scoop, but I thought that the 83 and 84 cars didn't get a functional hood, maybe so. But I know that none of the 85 and up cars had functional hoods.
Later, Garrett

 

hey i was on ebay and actuly found just the AIR INDUCTION unit.. try searching for it. then all you have to do is cut a slot, put a screen up there and put this on and wire it up.

 

here is the link

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1852524083

 

82 and 83 had the functional air induction on the hoods when you had the cross-fire injection. The engine was no longer available on the f-bodies after 83.

 

but the hood was

 

 

82-83 Crossfire 305's had it and 83-84 305 HO's had it. If you have an LG4 82-84 TA or an 87-92 Formula, then you have just the hood wih the block off plate or a screen.

The cold air induction system can be retrofitted to any of these cars that didnt originally come with it by just obtaining the parts.(except TPI guys) Make sure you get the air cleaner lid also

If you do have TPI(Formula) then you can at least get the screen that came with the earlier TA's and get rid of that stupid black plate. It'll free up some underhood heat.

 

my 84 ta isnt a HO and it came with it from the factory.

 

Maybe some "non HO" cars had it too. I've seen 84 TA's without it though. Maybe it was a stand-alone option....can anybody verify this?

 

My '83 T/A has the functional hood & it's the LG4.

 

maybe it was just a v8 thing in 84?

 

my 83 T/A LG4 also had the functioning hood scoop thingie...

It may have been an option on the LG4 and standard on the HO for 83-84...

I dunno.

John

 

My 1983 LG4 T/A has the functional hood also. It still works today.

 

most of the onees I have seen the solonoid is broke

 

i dont know if mine is working or not...how would i check it? when i go to the track, i rig it so its always open so i know for sure im making good use of it.

 

I have 84 T/A Recaro with functioning cowl.And i have 305 HO under the hood.But i don't know if it works or not.Can someone give some more information about it's function and how to check if it works correctly etc..

 

Correct me if I'm wrong but can't you just put the key in the on posistion and open the hood and push the pedal down all the way to see if it opens?

 

Did you try that on your '84?Also do you know what to check if it doesn't work?I've kept it open for sometime but it was running too rich i guess.

 

I haven't tried it yet because I've only owned the car not even a week It's not exactly at the top of my list of things to fix either if you know what I mean....

 

There are 82-83 carlburated models with functional cowl hood.In 84 they didn't had the cross-injection but there was 305 HO Trans-Am's with functioning induction.There could be some LG4 with functioning cowl induction also (it could be optional).After 84 there was Formula with fake induction.And those were the last ones i think.

 

Hey 92 GTA..those are fast

 

SORRY!

(cont'd)...1/4 mile times for your 305 auto GTA. Even the 350 with the SLP pkg wasn't that fast. What other mods have you done?

 

As far as I know....the 82-83 CFI cars had the functional "power bulge" hood. Mid-82 to 84 LG4 cars had it as well as the L69 cars. As far as an 87 to 92 Formula...they werent available with it, just the block off plate as said above. Now the only way to make one semi functional on a Formula, Id say it has to be an L03 car. You can take your existing TBI air cleaner and put the lid from a car with the setup in question on it. I see no way to "rig" one up on a LB9 or L98 car. But I'm glad to say, my 83 Trans Am came with it with the LG4 and still works to this day.

 

Whne I did my onversion on my 87 that HAD the LG4, I just took the piece off the hood, and put it on mine. the top of the aircleaner even fit perfect on my 87 airlceaner base, same filter, everything.

John

 

 

I got that on my T/A. The Selinoid works (hot wired it to check).

It'll be for sale soon. Hood, adapter, selonoid, air cleaner assembly with brand new K/N and breather. Not shure how much yet. E-mail me if interested. Will fit any carberated firebird/TA with stock height intake. Should fit TBIs too but not shure.

BTW the 305 died right after I bought the car. I'm looking at a rebuilt 400 pontiac and t400 trans a freinds got. So I'm probably going to need a taller hood anyways.

 

jonnyformula "yeah, i'm kinda curious about that too. i have a 90 formula with the "power bulge" cowl induction hood, but the whole thing is sealed. any way i can convert this into true cowl induction?"

you can take that black plate out you know
but if you have TPI it really wont do anything but let water in. (maybe let some heat out too) If u have TBI if might b a lil usefull if you have an open element.

 

I took the plate out and put the screen in...it looks a lot cooler and it lets hot air out...I never had a problem with water getting in. It even has a honeycomb pattern(like old GTO's and TA's).

If I had TBI I would definitely hook it up to the scoop but its useless with the TPI.

 

My 84 15th Ann. and my 84 Recaro (just sold today-sniff, sniff) both have L69 engines with operating air induction. Anytime I would get caught in the rain water would leak onto the top of the air cleaner. I would have to dry it off before parking otherwise it would rust.
To check the operation of the system the shop manual says the following:
"Make sure engine is at nomal operating temperature. Disconnect and plug the hose to the manifold vacuum switch. The hood louvre should open. If the louvre does not open, check the C-H fuse and the system ground." The vacuum switch is mounted on the left side of the firewall in the engine compartment. According to the wiring diagram, the oil pressure switch and the cold override switch are part of the system as well, so one needs to be a detective to track down any problems!

 

With the engine warmed up and running ,under heavy load (low manifold vacuuum) the hood Louver opens to provide extra ram air to the engine .With the Ignition switch in Run and the engine running current flows through the oil pressue switch (oil pressure normal)and the cold overide switch(engine warm),This applies voltage to the manifold vacuum switch , When the engine is under heavy load the manifold vacuum switch moves to low vacuum and current flows through the switch and the hood louver solenoid to g115 .The solenoid operates and opens the hood louver .(troubleshooting hints)Start the engine and let it idle.Be sure the engine is warmed up.Dissconnect and plug the vacuumhose to the manifold vacuum swutch . The hood louver opens .If the hood louver does not open ,check the C-H FUSE and G115.

 

Further to Ron84TAs info, the C-H fuse is 20 amps and also protects the choke heater and parts of the charging system and computer control module.
G115 is just a ground, and is located on the underside of the hood, left of the louver. It is usually covered by the hood insulation, so is hard to see.

 

I can easely hear the air being sucked in the louver when Im driving my car so I know its working .