L88 hood: made the vents functional - Corvette Forum : DigitalCorvettes.com Corvette Forums
 
 
Go Back   Corvette Forum : DigitalCorvettes.com Corvette Forums > C3 Corvette Forums > C3 Corvette
Register Forums Garage Garage Mark Forums Read Auto EscrowInsurance

Notices

C3 Corvette
C3 Corvette General | Technical | Performance | Aftermarket | Discussions

Other sections:
Corvettes Classifieds
Corvette Detailing & Car Care
Corvette Audio/Video/Radar
General Automotive/Shop/Tools
Corvette Performance Driving/Racing

( Sponsored by: Zip Corvette Parts )

Shops/Tuners
Custom Image Corvettes
A&A Corvette
Corvette tuner

Interior
Corvette aftermarket products

Insurance

Parts & Products
Race Ramps
Edelbrock
ATI/Procharger
Corvetteguys.com
Melrose Motorsports
Parts Taxi
Airaid
Mid America Motorworks
Pfadt Racing
Madvette Motorsports
Hi-tech Custom Concepts
Corvette aftermarket products
Corvette Garage
Corvette Parts and Accessories
Corvette Car Care Products
Corvette HID
Mid America Motoroworks

Tracks/Schools
Bob Bondurant School of High Performance Driving
Corvette driving school

Wheels/Tires
Cray Wheels

Services
BADWERKS.com
Reply
 
Thread Tools
Old 06-22-2012, 10:43 PM   #1
rpol98
DC Crew
 
rpol98's Avatar
 
Posts: 83
Member #62571
Member since: Jul 2007
Location: Hawaii

Thanks: 0
Thanked 1 Time in 1 Post
L88 hood: made the vents functional

i finally decided to cut holes in my hood (what a drastic decision!). anyways, since the engine runs pretty hot, i figured making the L88 hood vents functional wouldn't hurt.

started off with some 1" slices off of 5" stainless exhaust tube, luckily it's sold by the foot. after squishing it in a vise, the slots are just over 3/4" wide.

used some 14-ga stainless sheet for the face plate, and some stainless wire mesh. I shoulda used longer screws for the "studs" but oh well, it's done now.

EPDM foam rubber gaskets on both sides, nyloc nuts.

it ain't the prettiest, if you get real close to it, you can see all the human errors, but i figure it's better than just a cut-out hole. tried to polish it up as best as i can but didn't want to put in the hours to go whole-hog for a mirror finish. it took more time than i wanted it to.








Last edited by rpol98; 06-30-2012 at 11:08 PM.
rpol98 is online now   Reply w/quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-22-2012, 11:39 PM   #2
Metalkid
DC Crew
 
Posts: 947
Member #92641
Member since: Oct 2009
Location: Las Vegas, NV USA

My Corvette(s)
1978 Silver Anniversary Model #678

Thanks: 8
Thanked 25 Times in 25 Posts
WOW!!!! THAT looks friggin' AWESOME!!!!!

I've never seen a vented L-88 hood, and often wondered if it was supposed to be more than just ornamental styling. Now I know, and now I want to put one on my 78 SA!!! I'm not one for non-functional based mods. I've always like the L-88 Hood, but it not being period correct for a 78, and seeing no functional improvement with the non-vented version you see everywhere, I all but ruled out going that route.

However, after seeing your beautifully crafted "ventage", I have a new item on the "To Do" list.


AWESOME!!! Just AWESOME!!!!
Metalkid is online now   Reply w/quote Quick reply to this message
Old 06-22-2012, 11:52 PM   #3
rpol98
DC Crew
 
rpol98's Avatar
 
Posts: 83
Member #62571
Member since: Jul 2007
Location: Hawaii

Thanks: 0
Thanked 1 Time in 1 Post
not that it makes any difference, my C3 is a 78SA. now it has a big block, therefore the L88 hood. also has a 700R4. obviously didn't come that way from the factory.

one of these days i'll get the hood painted to match the car, but kinda low priority, doesn't make the car any faster.

i had trouble settling on a shape for the face plate, something that would complement the design, curves of the L88 vents. if i had to do it all over again, might've done something that blended into the outer curves.

wood block prevents tubing collapse when clamped


3/4" dowel (with flat side) controls radius


used a flat steel block (partially visible at right edge of pic) to control center inward bowing

Last edited by rpol98; 06-24-2012 at 04:52 AM.
rpol98 is online now   Reply w/quote Quick reply to this message
Old 06-23-2012, 10:25 AM   #4
riggs 74
DC Crew
 
riggs 74's Avatar
 
Posts: 1,103
Member #78208
Member since: Dec 2008
Location: ohio, springfield

My Corvette(s)
74 vette

Thanks: 9
Thanked 35 Times in 35 Posts
You have some great skills, I love the look.

When washing the car, will the water run into and on top of the motor, or would it run down just in front of the motor. I would love to run an L88 hood with those vents, but if I had to worry about the water making a mess on the motor, I won't do it.


Riggs
riggs 74 is online now   Reply w/quote Quick reply to this message
Old 06-23-2012, 12:03 PM   #5
Metalkid
DC Crew
 
Posts: 947
Member #92641
Member since: Oct 2009
Location: Las Vegas, NV USA

My Corvette(s)
1978 Silver Anniversary Model #678

Thanks: 8
Thanked 25 Times in 25 Posts
Quote:
Originally Posted by riggs 74 View Post
You have some great skills, I love the look.

When washing the car, will the water run into and on top of the motor, or would it run down just in front of the motor. I would love to run an L88 hood with those vents, but if I had to worry about the water making a mess on the motor, I won't do it.


Riggs
I would think that someone with your skills could fabricate some kind of a drip pan with a pair of drip hoses directing the water to discharge along the drip channels on the inner fender/hood joint.
Metalkid is online now   Reply w/quote Quick reply to this message
Old 06-23-2012, 06:27 PM   #6
rpol98
DC Crew
 
rpol98's Avatar
 
Posts: 83
Member #62571
Member since: Jul 2007
Location: Hawaii

Thanks: 0
Thanked 1 Time in 1 Post
my fabrication skills are pretty crude: hammer, vise, jig-saw, band-saw, C-clamps, etc. I do use stainless MIG wire, though, thank goodness i can grind all the big fat ugly bumpy welds flat.

I've had the L88 hood for quite a while, i had drilled a rain drain hole at the front of the V-trough already. it drains, i think, on the water pump/pulley area.

I have toyed with the thought of some kind of drain channel or catchment, but haven't been struck with a clean nice best solution yet. i figure if i'm washing the car, i can just throw a neoprene fender cover over the front of the motor under the hood. it's not a show motor, it has a lot of "patina".
rpol98 is online now   Reply w/quote Quick reply to this message
Old 06-23-2012, 07:40 PM   #7
riggs 74
DC Crew
 
riggs 74's Avatar
 
Posts: 1,103
Member #78208
Member since: Dec 2008
Location: ohio, springfield

My Corvette(s)
74 vette

Thanks: 9
Thanked 35 Times in 35 Posts
[QUOTE=rpol98;1969337]my fabrication skills are pretty crude: hammer, vise, jig-saw, band-saw, C-clamps, etc. I do use stainless MIG wire, though, thank goodness i can grind all the big fat ugly bumpy welds flat.
QUOTE]

you just described my skills and how I usually get the job done. I'm sure if I had access to a real shop with the right tools, I could probably turn out some nice work.




I do want to run a L88 hood, and I will vent it, We'll have to wait and see if it turns out as well as your's.

Riggs
riggs 74 is online now   Reply w/quote Quick reply to this message
Old 06-24-2012, 07:31 AM   #8
MIKE80
DC Crew
 
MIKE80's Avatar
 
Posts: 892
Member #85716
Member since: May 2009
Location: Stockton, NJ

Thanks: 9
Thanked 23 Times in 22 Posts
Nice mod! Have you noticed any improvement of your engine temp?
MIKE80 is online now   Reply w/quote Quick reply to this message
Old 06-24-2012, 04:24 PM   #9
rpol98
DC Crew
 
rpol98's Avatar
 
Posts: 83
Member #62571
Member since: Jul 2007
Location: Hawaii

Thanks: 0
Thanked 1 Time in 1 Post
Mike80: sorry, not on the road yet, have a long list of other things to fix while i got it in the garage. i'll follow up later when it's back on the road again.
rpol98 is online now   Reply w/quote Quick reply to this message
Old 06-25-2012, 07:47 AM   #10
matchframe
DC Pit Crew Boss
 
matchframe's Avatar
 
Posts: 9,559
Member #1213
Member since: Jun 2003
Location: Dickinson, (Houston) Texas USA

My Corvette(s)
1978 Modification in progress

Thanks: 220
Thanked 24 Times in 20 Posts
That's cool!!

I may have to do this too!
matchframe is offline   Reply w/quote Quick reply to this message
Old 06-25-2012, 10:24 AM   #11
windrider120
DC Crew
 
windrider120's Avatar
 
Posts: 43
Member #13346
Member since: Jun 2004
Location: NJ/USA

My Corvette(s)
1972 BB Auto; 1996 Collector edition, 6 speed, LT4

Thanks: 0
Thanked 0 Times in 0 Posts
Vent ports in L-88 hood.

Sweet execution, so to speak. What I'm curious about is if air actually will flow out of engine compartment through those ports. I seem to recall a thread a whaile ago over on another forum (CF) about this, where the OP showed pics of a hood with threads attached at various points at speed. Dam this memory, can't remember where I saw it.

Anyway nice job looks mean!
windrider120 is offline   Reply w/quote Quick reply to this message
Old 06-25-2012, 12:34 PM   #12
D_B
DC Crew
 
D_B's Avatar
 
Posts: 2,164
Member #109378
Member since: Jun 2010
Location: Columbia, Missouri

My Corvette(s)
Custom / Modified 1977 Corvette

Thanks: 15
Thanked 76 Times in 74 Posts
Quote:
Originally Posted by windrider120 View Post
Sweet execution, so to speak. What I'm curious about is if air actually will flow out of engine compartment through those ports. I seem to recall a thread a whaile ago over on another forum (CF) about this, where the OP showed pics of a hood with threads attached at various points at speed. Dam this memory, can't remember where I saw it.

Anyway nice job looks mean!

I'm not sure how vents at the L88 scoop would work but basic airflow under a stock non vented hood as it's designed is that air is forced in through the nose and as higher pressure builds in the closed engine bay, air is vented out through the side vents and under the car.

Driving at speed, with air passing over the L88 vents, I could see this possible causing a suction of sorts maybe helping remove hot engine bay air.

This might all be made more effective with a larger chin spoiler to scoop up more air at speeds. I don't think you'll see anything drastic at idle or slow in town speeds.
D_B is online now   Reply w/quote Quick reply to this message
Old 06-25-2012, 01:23 PM   #13
tektrans
DC Crew
 
tektrans's Avatar
 
Posts: 542
Member #79719
Member since: Jan 2009

Thanks: 5
Thanked 10 Times in 10 Posts
Thats AWESOME!! I love it.
So original too-Sweeeeeeeet!!
tektrans is offline   Reply w/quote Quick reply to this message
Old 06-25-2012, 08:31 PM   #14
brent319
DC Crew
 
brent319's Avatar
 
Posts: 923
Member #113953
Member since: Sep 2010
Location: iowa city/iowa/usa

My Corvette(s)
76 LS1/Richmond 6

Thanks: 27
Thanked 33 Times in 33 Posts
I think from previous discussions about induction on the 'vette that there is a low pressure area around there, and as such does not make for a good place to suck air in, but with the pressure under the hood and a possible low pressure above it, I would think it would vent.
Was that on Bee Jay's car? Maybe he will chime in here.....
brent319 is online now   Reply w/quote Quick reply to this message
Old 06-26-2012, 05:36 AM   #15
tektrans
DC Crew
 
tektrans's Avatar
 
Posts: 542
Member #79719
Member since: Jan 2009

Thanks: 5
Thanked 10 Times in 10 Posts
I would've thought the opposite.
Cowl induction works under the condition of a high pressure area at the base of the windshield.
In the L88 hood, wouldn't the base of the hood scoop up front and the added vents fucntion as a cowl induction set up?
The base of the scoop mimmicking the base of the windshield and openings the OP added functioning like the back of a cowl hood?
tektrans is offline   Reply w/quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Corvette Forum : DigitalCorvettes.com Corvette Forums forums, you must first register.
Please enter your desired user name (12 CHARACTERS MAXIMUM), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 10:20 PM.




Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
2003-2011, DigitalCorvettes.com - All Rights Reserved