Go Back   Corvette Forum > C1 & C2 Corvettes, 1953 - 1967 > C1 & C2 Corvettes
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C1 & C2 Corvettes
General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations Sponsored by
Flaming River
Industries

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 05-11-2013, 04:37 PM   #1
Bluestripe67
CF Senior Member
 
Bluestripe67's Avatar
 
Member Since: Jan 2002
Location: Chevy Chase MD.
Default BB hood fresh air induction

.com/user/Bluestripe67/media/DSCN3676_zps6b089fb5.jpg.html][/URL]

I know some of you guys have talked about making the BB hood functional. Since I have mastered the photo thing here on the CF, here are the shots of what I made for my car and the details. SB w/Edelbrock Performer intake, Edelbrock 625CFM carb, dropped base air filter, 3" filter, and standard GM distributor/cap/wires. The hood is a GM issued replacement. Look at the shot of the backside of it and you can see the specific ribbing/reinforcements around the perimeter. I removed the three ribs at the back side (see the yellow tape markers) so the air would have a smooth entry path. I do not know about modifying a production hood. I guess you can do the same cut, but you will have to close the open ends, no big deal. First effort I mocked the unit up with cardboard to get height numbers (used modeling clay) for hood clearance. Second effort I got some scrap sheet metal and did the mockup and finally with all the specs and fit just right I took it to a sheet metal fabricator for the final that you see in the engine shot. The foam was bought at the Army/Navy surplus store and cut to fit. This fresh air induction made a big difference in performance and drivability. You will need to re-jet your carb due to the nice cooler air coming in. Dennis
Bluestripe67 is offline   Reply With Quote
Old 05-12-2013, 01:41 PM   #2
Marks69BB
CF Senior Member
 
Marks69BB's Avatar
 
Member Since: Jun 2001
Location: NC USA
Default

Or you could bond in the L88 airbox from Ecklers like GM did for cowl induction back in the day:

http://www.ecklerscorvette.com/corve...hood-1967.html

You would also need the L88 air cleaner base setup (below on my 69) which means your air filter goes up inside the airbox.

Click the image to open in full size.

Last edited by Marks69BB; 05-12-2013 at 01:44 PM.
Marks69BB is offline   Reply With Quote
Old 05-12-2013, 02:17 PM   #3
Bluestripe67
CF Senior Member
 
Bluestripe67's Avatar
 
Member Since: Jan 2002
Location: Chevy Chase MD.
Default

Marks69BB, your installation deals with factory components where mine are aftermarket integrated parts resulting in the custom build. The principal of function and results remains the same...free HP. Dennis
Bluestripe67 is offline   Reply With Quote
Old 05-12-2013, 02:43 PM   #4
toddalin
CF Senior Member
 
Member Since: Oct 2000
Location: Santa Ana CA
Default

So you can't use it with the ignition shield?

It doesn't look like you could squeeze a whole lot of air through that small area above the cowl in the back. And of course you recognize that a factory BB hood is nothing like that on the underside.

Click the image to open in full size.

Last edited by toddalin; 05-12-2013 at 02:47 PM.
toddalin is offline   Reply With Quote
Old 05-12-2013, 02:55 PM   #5
Bluestripe67
CF Senior Member
 
Bluestripe67's Avatar
 
Member Since: Jan 2002
Location: Chevy Chase MD.
Default

toddalin, I stated the difference in hoods in my OP. True...you can't use it with shielding! I have no way of knowing the CFM flow from the opening. I can tell you that it must be enough. It made a very noticeable difference in low end torque because when I went to the track (previous runs 13.5, 13.6) a second time I couldn't get the tires too hook through 1st into 2nd and turned 14.1, 14.3. That proved my point of free HP/TQ from the fresh air induction. Dennis

Last edited by Bluestripe67; 05-12-2013 at 02:58 PM.
Bluestripe67 is offline   Reply With Quote
Old 05-12-2013, 04:02 PM   #6
Marks69BB
CF Senior Member
 
Marks69BB's Avatar
 
Member Since: Jun 2001
Location: NC USA
Default

Dennis: I agree this is all factory stuff; just another option for those who have original 67 BB hoods but the airbox could be integrated into any aftermarket hood with some fab work to get the benefit of cowl air induction. It made a huge difference on my 69 with the 555!

Quote:
Originally Posted by toddalin View Post
It doesn't look like you could squeeze a whole lot of air through that small area above the cowl in the back. And of course you recognize that a factory BB hood is nothing like that on the underside.
Here's a pic of a real 67 L88 hood compliments of an older JohnZ post:
Click the image to open in full size.

Before bonding in the airbox, the stock BB hood whould have to be cut out above the rear support for cold air cowl induction.
__________________
'69 Monaco Orange/Blk leather (PB,PS,PW,AC) Coupe orig 427-400 w/4 spd, now Mk IV Bowtie 555-750hp with Keisler 5 spd
'65 Tuxedo Black/Red #s matching 327-300 4 spd radio delete Coupe w/added sidepipes, teak wheel & KOs
'60 Honduras Maroon/White coves/Blk interior, #s matching 283-230 4 spd w/added correct '60 270hp 2X4s
'57 White/Silver coves/Red interior, #s matching 283-283 4 spd no-option Fuelie w/correct '57 270hp 2x4s, body in paint - FI unit restored & ready to install
Marks69BB is offline   Reply With Quote
Old 05-12-2013, 04:24 PM   #7
Bluestripe67
CF Senior Member
 
Bluestripe67's Avatar
 
Member Since: Jan 2002
Location: Chevy Chase MD.
Default

That's a great shot of an orig. BB/L-88 hood. Is it fun playing with these cars or what? Dennis
Bluestripe67 is offline   Reply With Quote
Old 05-12-2013, 06:44 PM   #8
GreaseMonkey
CF Senior Member
PA Events Coordinator
 
GreaseMonkey's Avatar
 
Member Since: Aug 2000
Location: Carlisle PA
Send a message via Yahoo to GreaseMonkey
Default

Looks interesting Dennis. Nice work
GreaseMonkey is offline   Reply With Quote
Old 05-12-2013, 07:05 PM   #9
65tripleblack
CF Senior Member
 
65tripleblack's Avatar
 
Member Since: May 2003
Location: Ocean Township NJ
Default

Now, the REAL puzzle would be how to get cool air induction using a '65-'66 BBC hood.

I have ideas in mind, but not mocked-up yet.

Trick!
65tripleblack is offline   Reply With Quote
Old 05-12-2013, 07:33 PM   #10
ren
CF Senior Member
 
ren's Avatar
 
Member Since: Jun 2005
Location: Scranton Pennsylvania
Default

My 63 had a BB hood with the front cut out to allow air flow.It was OK , but not totally functional. Has the car painted last year so I bought a new BB hood. I found a part in Ecklers cat, called " fresh air induction". It has to be molded to the under side of the of the hood and it fits pretty tight around the air cleaner. It looks great and works great. If I ever figure out how to take pictures, I'll post a few.
ren is offline   Reply With Quote
Old 05-12-2013, 09:41 PM   #11
Bluestripe67
CF Senior Member
 
Bluestripe67's Avatar
 
Member Since: Jan 2002
Location: Chevy Chase MD.
Default

If I ever figure out how to take pictures, I'll post a few.[/QUOTE]

Ren, Go to the latest post up top in the stickies section about posting pics. Thats how I learned and succeeded on this post. Trick was using the tutorial on my laptop beside the desktop PC. Dennis
Bluestripe67 is offline   Reply With Quote
Old 05-13-2013, 01:48 PM   #12
toddalin
CF Senior Member
 
Member Since: Oct 2000
Location: Santa Ana CA
Default

Quote:
Originally Posted by 65tripleblack View Post
Now, the REAL puzzle would be how to get cool air induction using a '65-'66 BBC hood.

I have ideas in mind, but not mocked-up yet.

Trick!
Here you go.

Click the image to open in full size.
toddalin is offline   Reply With Quote
Old 05-13-2013, 03:00 PM   #13
magicv8
9 Hot Rod Power Tours
 
magicv8's Avatar
 
Member Since: Nov 2000
Location: Going too fast over the hill.
Default

Quote:
Originally Posted by Marks69BB View Post
Or you could bond in the L88 airbox from Ecklers like GM did for cowl induction back in the day

You would also need the L88 air cleaner base setup (below on my 69) which means your air filter goes up inside the airbox.
You also need to rework the whole thing to get it to line up with a small block.
you can't just slide the air box back.

Last edited by magicv8; 05-13-2013 at 03:10 PM.
magicv8 is offline   Reply With Quote
Old 05-13-2013, 03:21 PM   #14
magicv8
9 Hot Rod Power Tours
 
magicv8's Avatar
 
Member Since: Nov 2000
Location: Going too fast over the hill.
Default

Quote:
Originally Posted by 65tripleblack View Post
Now, the REAL puzzle would be how to get cool air induction
using a '65-'66 BB hood.
The screened hole at the front of the center aluminum panel is in the high pressure area in front
of the rubber A-C hood seal, when the hood is down. The screen is needed to minimize incoming
bugs. No holes were drilled to mount the aluminum panels. It made an incredible difference, since
the heat coming from the A-C unit in front of the radiator was no longer entering the carburetor.
Click the image to open in full size.

Click the image to open in full size.

Last edited by magicv8; 05-14-2013 at 11:38 AM.
magicv8 is offline   Reply With Quote
Old 05-14-2013, 09:40 AM   #15
65tripleblack
CF Senior Member
 
65tripleblack's Avatar
 
Member Since: May 2003
Location: Ocean Township NJ
Default

Quote:
Originally Posted by toddalin View Post
Here you go.

Click the image to open in full size.
That looks great, and has been and still is a possibility for me.

My goal is getting it to function without any external modifications, which means drawing air through the a chrome side grills.
65tripleblack is offline   Reply With Quote
Old 05-14-2013, 09:42 AM   #16
65tripleblack
CF Senior Member
 
65tripleblack's Avatar
 
Member Since: May 2003
Location: Ocean Township NJ
Default

Quote:
Originally Posted by magicv8 View Post
The screened hole at the front of the center aluminum panel is in the high pressure area in front
of the rubber A-C hood seal, when the hood is down. The screen is needed to minimize incoming
bugs. No holes were drilled to mount the aluminum panels. It made an incredible difference, since
the heat coming from the A-C unit in front of the radiator was no longer entering the carburetor.
Click the image to open in full size.

Click the image to open in full size.
I'm happy it works for you.
I'm not smart enough to follow what you did, though.
65tripleblack is offline   Reply With Quote
Old 05-14-2013, 09:46 AM   #17
65tripleblack
CF Senior Member
 
65tripleblack's Avatar
 
Member Since: May 2003
Location: Ocean Township NJ
Default

Quote:
Originally Posted by ren View Post
My 63 had a BB hood with the front cut out to allow air flow.It was OK , but not totally functional. Has the car painted last year so I bought a new BB hood. I found a part in Ecklers cat, called " fresh air induction". It has to be molded to the under side of the of the hood and it fits pretty tight around the air cleaner. It looks great and works great. If I ever figure out how to take pictures, I'll post a few.
I can't find it.
65tripleblack is offline   Reply With Quote
Old 05-14-2013, 11:49 AM   #18
magicv8
9 Hot Rod Power Tours
 
magicv8's Avatar
 
Member Since: Nov 2000
Location: Going too fast over the hill.
Default

Quote:
Originally Posted by 65tripleblack View Post
I'm happy it works for you.
I'm not smart enough to follow what you did, though.
I made a cardboard template, then took a piece of sheet aluminum and bent a double step in it to step over the hood frame. At the front of the hood is a hole to let cold air get in. The A-C hood seal hits the aluminum just in back of the hole when the hood is down. At the other end the cold air comes out of the 3 inch gap between the aluminum and the hood, right in front of the air cleaner.

The steel rain shields for the hood grilles were exchanged for aluminum pieces that also let cold air in to the air cleaner.

Cardboard templates were cheap and the aluminum was bent on the edge of my work bench.

Last edited by magicv8; 05-14-2013 at 11:52 AM.
magicv8 is offline   Reply With Quote
Old 05-14-2013, 12:12 PM   #19
Matt Gruber
CF Senior Member
 
Member Since: Oct 2000
Location: New Smyrna Beach, FL
Default

can also remove the rubber flaps over the A frames and plumb cold air there(inside the wheel well).. not so good on dirt roads or in a downpour making sharp turns imo.
Matt Gruber is offline   Reply With Quote
Old 05-14-2013, 02:47 PM   #20
65tripleblack
CF Senior Member
 
65tripleblack's Avatar
 
Member Since: May 2003
Location: Ocean Township NJ
Default

Quote:
Originally Posted by magicv8 View Post
I made a cardboard template, then took a piece of sheet aluminum and bent a double step in it to step over the hood frame. At the front of the hood is a hole to let cold air get in. The A-C hood seal hits the aluminum just in back of the hole when the hood is down. At the other end the cold air comes out of the 3 inch gap between the aluminum and the hood, right in front of the air cleaner.

The steel rain shields for the hood grilles were exchanged for aluminum pieces that also let cold air in to the air cleaner.

Cardboard templates were cheap and the aluminum was bent on the edge of my work bench.
Thanks!
The hole in the front of the hood sounds good. Like a modern Z06.
I'll keep that scheme in mind.
65tripleblack is offline   Reply With Quote
Old 05-14-2013, 02:47 PM
 
Go Back   Corvette Forum > C1 & C2 Corvettes, 1953 - 1967 > C1 & C2 Corvettes
Reload this Page BB hood fresh air induction
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Vacation aj1988 C4 General Discussion 6 04-28-2014 08:40 PM
FS: C6 Z06 calipers NV MY C5 C6 Parts for Sale/Wanted 5 08-07-2013 01:53 AM
FS: VY speed bra, Z06 seat covers NV MY C5 C6 Parts for Sale/Wanted 11 06-17-2013 06:28 PM
Cruise for Veterans Bluestripe67 C1 & C2 Corvettes 1 05-26-2013 12:40 PM
Have you ever wondered.... Bluestripe67 C1 & C2 Corvettes 9 12-02-2012 07:15 PM


All times are GMT -4. The time now is 05:52 AM.


Emails & Password Backup