Cold air induction
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Instructor
Joined: May 2005
Posts: 176
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From: Las Vegas NV
Cold air induction
I have a 71 BB would like to make some kind of cold air induction (live in las vegas summers are brutal) want to use factory BB hood. Any ideas just thought i would ask. Pictures would be great 
Melting Slicks
Joined: Dec 1999
Posts: 2,116
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From: Mid West
Cruise-In III Veteran
Here's one I built for a small block hood. You might be able to do something similiar for your big block. When the hood is closed, car looks stock.
http://temp.corvetteforum.net/c3/greatwhite/
http://temp.corvetteforum.net/c3/greatwhite/
Instructor
Joined: May 2005
Posts: 181
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From: New Port Richey FL.
I was wondering about placing small 12v fans in the dual intake ducts. Would this work on his or help? Not to high jack, but it is something I have started to work out and if it could help or it's been done. The idea is to install intakes from a 80's or 90's camaro run the duct work to the carb, where there would be an insalated wrap around an open air filter, that the duct work would attach to. With the 12v fans in the intakes it would blow air in at idle and at speed cowl induction would work and the air would pass by the fans on it's own. If this is completely stupid please disregard.
Melting Slicks
Joined: Apr 1999
Posts: 2,010
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From: Moon Twp. PA USA
Originally Posted by Jason Staley
Here's one I built for a small block hood. You might be able to do something similiar for your big block. When the hood is closed, car looks stock.
http://temp.corvetteforum.net/c3/greatwhite/
http://temp.corvetteforum.net/c3/greatwhite/
How exactly did you do what you did? Did you cut into the panel that separates the engine from the cowl area? The Dynamat thing, I don't understand, unless it is open to the cowl area.
I also have a '76, and with the RPM intake, I don't have a lot of room.
Tell me how you did it!!
Thanks,
Melting Slicks
Joined: Apr 2001
Posts: 3,399
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From: Olmsted Falls, Ohio
Originally Posted by glen242
I also have a '76, and with the RPM intake, I don't have a lot of room.
His pictures of the hood look like a 73-75 hood. In your case it might just be easier to get a 73-75 cowl induction hood and it probably would give you that extra inch or so you want.
Ken
Race Director
Joined: Apr 1999
Posts: 11,520
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From: CORVETTE 77 385 C.I. TEXAS
Originally Posted by glen242
Did you cut into the panel that separates the engine from the cowl area? The Dynamat thing, I don't understand, unless it is open to the cowl area.
I also have a '76, and with the RPM intake, I don't have a lot of room.
I also have a '76, and with the RPM intake, I don't have a lot of room.
Did a similiar cowl setup on my 77 awhile back.
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From: Smile, it's just the internet.
71 has a short hood. There is no way to cut it like that without making it obvious...unless it was cut in the front where the crome trim pieces are, but that's a low pressure area and will actually make your engine work HARDER.
One option would be to route air in from the wiper trough somehow. Of course, using the later snorkle-type air cleaner assemblies and ducting would be easiest, but I'm not if they would fit under the hood.
An L88 hood with airbox is pre-engineered...'course that's a $1000 option by the time you get it painted and buy all the parts necessary to make it functional...
One option would be to route air in from the wiper trough somehow. Of course, using the later snorkle-type air cleaner assemblies and ducting would be easiest, but I'm not if they would fit under the hood.
An L88 hood with airbox is pre-engineered...'course that's a $1000 option by the time you get it painted and buy all the parts necessary to make it functional...
Melting Slicks
Joined: Apr 1999
Posts: 2,010
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From: Moon Twp. PA USA
Originally Posted by KenSny
Larry,
His pictures of the hood look like a 73-75 hood. In your case it might just be easier to get a 73-75 cowl induction hood and it probably would give you that extra inch or so you want.
Ken
His pictures of the hood look like a 73-75 hood. In your case it might just be easier to get a 73-75 cowl induction hood and it probably would give you that extra inch or so you want.
Ken
I want to keep things stock as much as possible. If opening up an area in the cowl and ducting in cold air, I MIGHT be up to that.
Gotta feed the new 383!
Race Director
Joined: Apr 1999
Posts: 11,520
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From: CORVETTE 77 385 C.I. TEXAS
If just the hood is opened at the cowl area & the carb is not sealed to the hood opening, it will let hot air out when stopped & intake cooler air at speed. At speed hot air goes out the side vents.
Melting Slicks
Joined: Apr 1999
Posts: 2,010
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From: Moon Twp. PA USA
Originally Posted by Ganey
If just the hood is opened at the cowl area & the carb is not sealed to the hood opening, it will let hot air out when stopped & intake cooler air at speed. At speed hot air goes out the side vents.
Race Director
Joined: Apr 1999
Posts: 11,520
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From: CORVETTE 77 385 C.I. TEXAS
That was answer to Bullyj question.
Yours was no.8.
Originally Posted by Bullyj
Would opening the cowl up help to keep the engine compartment cooler by allowing the hot ait to escape.
Melting Slicks
Joined: Dec 1999
Posts: 2,116
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From: Mid West
Cruise-In III Veteran
Been away for a few days.....
The tray covered in dynomat is attached to the chrome aircleaner and seals against the hood. The back edge seals against the brace that goes across the back of the hood. If you look close at the stock hoods, there is a good size opening between the hood and this brace on the engine side. The tray seals against the bottom of this brace, and I cut the two slots in the back edge of the hood above the brace. This allows cold air from the cowl area to flow thru the back of the hood above the brace. Probably not quite as good as some other setups, but it didn't require a new hood or modifications to the appearance of my car.
The tray covered in dynomat is attached to the chrome aircleaner and seals against the hood. The back edge seals against the brace that goes across the back of the hood. If you look close at the stock hoods, there is a good size opening between the hood and this brace on the engine side. The tray seals against the bottom of this brace, and I cut the two slots in the back edge of the hood above the brace. This allows cold air from the cowl area to flow thru the back of the hood above the brace. Probably not quite as good as some other setups, but it didn't require a new hood or modifications to the appearance of my car.
Safety Car
Joined: Mar 2002
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From: Okeechobee Florida
Originally Posted by lvjohn
I have a 71 BB would like to make some kind of cold air induction (live in las vegas summers are brutal) want to use factory BB hood. Any ideas just thought i would ask. Pictures would be great
my idea is to route cold air remotely using one of these however i cant seem to find any to purchase...
i figure that with one of these i can bring in cold air from wherever i choose...
anyone know where to find one of these???
