does any one know what goes here please its an 82 hood

 

I think only with the cold air system that let the ait in from in front of the rad to the top of the air breather through the hood cold-air box
M

 

Better picture


M

 

so after 13 years they figured out what they knew in 67. intake air from the front of the hood is travelling the right direction. once the hood has gone past the air it has to make a u-turn to enter the air box...

 

The L88 Hood was an early Cold Air Intake system designed for an engine with a high compression ratio. The air entering the carburetor is still ambient temperature and this helps the high compression engine not detonate. The warmer the intake air the more it will detonate and the less hp you will make. I have no detonation until the engine gets really, really Hot and I lug it, the engine is using Closed Chamber Cast iron Cylinder Heads. They are wonderful as they don't detonate anywhere near as much as the later Open Chamber Cylinder Heads which came about to clean up the emissions.

The OP should use the base plate and seals from the L88 intake system. I am using the whole wedding cake assembly on my 427 with a factory 1968 L88 Hood. It is an awesome system and works very well. The carburetor Base Plate for the L88 might help him get a seal with the hood.

What is that hood going to do when you drive it in the rain? That is the one problem that many cold air systems have, how do you separate the rain from the incoming air? Over at a nearby machine shop they have a collection of bent Rods where too much water got into the cylinders from these home made Cold Air Intake Systems.

 

Kev. That is the mounting bosses for the 'ram-air flapper'.
This was a metal piece with foam on the back. It had a solenoid that was wired into the TBI's that detected WOT and opened the flapper.
Also known as 'cold air intake'.

I have a perfect assembly that I took out of my 82 CE. (not for sale) I live in AZ.....I want cold air 'allatime'. So I removed and preserved it.

Cheers unkahal

 

If you actually look at the 82 system very carefully...it's pretty clever. Two piece hood, Air shovel/diverter on top of the radiator core support, Pretty decent gaskets to ENSURE that the cold air goes where it should. The 80-82 SHOVEL NOSE has a large shovel shaped air dam and this shoves the air upwards through the radiator and the same time in trough the trough.
You'd have to be driving through 1' of water to get H20 up through there! Far more efficient than the prior systems.

Unk

 

Hello there L-46man!

I was talking about the "home-made" Cold air intake systems. The systems designed by GM Engineers had thought about the rain issue and solved it before production. I trust GM! I have been very impressed at the thought that went into the factory air intake systems. I just refuse to use the HOT air from around the HOT engine to be used in Combustion.

Most of the Bent Rods were from Asian cars that "think/thought" they are/were race cars. The bent rod collection they have is impressive as a lot of tinkerers don't think about rain in their design. All the air going into my Combustion chambers is pulled from the base of my windshield and is nice and cool. Fortunately the air is forced forward separating it from any moisture. The L88 Hood when used with the engine parts really works very well for a High performance engine. Interestingly enough the L88 Hood uses no flaps or doors to work. When my hood is down it is sealed to the base plate of the carburetor using a 1" foam seal which then draws all the air from the windshield base. Simplicity at its best!

I use a Corvette Pace Car Spoiler on the front of my C3 when I want extra air up top. That really pushes the air UP where it "needs" to go. My C3 is very early and only the center section is open for air flow unless my headlights are in the "up" position and this makes problems for my High compression 427.

 

Mr. McCloskey...I couldn't agree with you MORE. You have an EXACT bead on things.

It is VERY difficult to do better than GM. They have CADRE's of engineers who can spend week after week "Honing their Cone'. LOL

I am an AeroThermodynamic Engineer (ex Aerospace)....My pet peaves are;

Hot air intakes...ie open chamber air-cleaners mounted in a super hot engine compartment with no air.
Poor radiator fan design and ELECTRIC fans...95% of them are total BS.
Not sealing the radiator to the core support.

The only mistake about cold air intakes that I'm aware of IN MY GM LIFETIME was the 82-83 Camaro Z-28...with Cold Water Hood Induction....that was basically one year and they fixed it.

Much Cheers. Unkahal