Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

Cowl hoods and carb sealing *NOW WITH PICTURES*

Thread Tools
 
Search this Thread
 
Old Jan 23, 2013 | 09:15 AM
  #101  
Johnny Blaze's Avatar
Supreme Member
iTrader: (15)
 
Joined: Oct 2003
Posts: 3,449
Likes: 5
From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
well i went out last night. checked on putting the cake pan under the carb but there will be more issues with that also. (fuel lines) so for me. I would have to incorperate the fuel lines into the air box. couple an fittings and a bulkhead fitting. but it will clear the valve covers. and i think it will clear the distributor. in the pics you can see the offset works at getting it to the hole. but also the aircleaner it too tall the hood will not close. so maybe a smaller filter element will help with that the pic where most of the aircleaner is in the hole i still had enough room to put my hand under the hood with it closed about 4 inchs before it closed. this aircleaner use to work with my old intake with this intake if i put a 1 inch carb spacer on (nos plate) the carb hit the hood without a aircleaner.
Add a dual return spring to that carb!
Reply
Old Jan 23, 2013 | 10:12 AM
  #102  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

my drop is 3/4. my concern is the extra 1 inch clearance over the top of the carb. i have a smaller air cleaner one inch thick no drop and only 9 inch around it fits in the hole no problem and doesn't hit the hood. but it's to small it restricts the 930 cfm the carb i have is a 850 jetted to 930 with smoothed blades and I honestly don't know what is all done to it. i sent it out to a speed shop in the area and told them to rebuild it the same way it is now settings wise because it was my father in laws race carb for this motor. theres no choke or anything on it. this is with no air cleaner looks like total i have about 3 inchs
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-774277_10200421901613009_661172987_o.jpg  

Last edited by jhainer; Jan 23, 2013 at 10:24 AM.
Reply
Old Jan 23, 2013 | 10:23 AM
  #103  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
my drop is 3/4. my concern is the extra 1 inch clearance over the top of the carb. i have a smaller air cleaner one inch thick no drop and only 9 inch around it fits in the hole no problem and doesn't hit the hood. but it's to small it restricts the 930 cfm the carb i have is a 850 jetted to 930 with smoothed blades and I honestly don't know what is all done to it. i sent it out to a speed shop in the area and told them to rebuild it the same way it is now settings wise because it was my father in laws race carb for this motor. theres no choke or anything on it.
All my vehicles (502 w/Holley, 355 w/ Barry Grant, 305 w/ Holley) have an 1 1/2" drop and there's no contact with the carb so maybe that'll be the same for you. Clearence for the float adjustment nuts, the fuel lines and the throttle is sufficient.
What I don't like is that with the 1 1/2" drop, it puts the lid of the air filter case within about 3/8" of the choke horn. I guess that's not a problem with no choke horn though.
As for air filters. if you run a K&N, a 14 x 3 is about as small as you'd want to go before the filter starts to restrict flow. Traditional paper elements are less forgiving and need to sized larger. An 11 x 4 offers the same filter area but the base on an 11" has zero drop so there may be other complications when the lid will be about 5" higher than the carb flange.

Last edited by skinny z; Jan 23, 2013 at 10:28 AM.
Reply
Old Jan 23, 2013 | 10:28 AM
  #104  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
My 502 has a 1 1/2" drop as does my 355 and there's no contact with the carb so maybe that'll be the same for you. Clearence for the float adjustment nuts, the fuel lines and the throttle is sufficient.
What I don't like is that with the 1 1/2" drop, it puts the lid of the air filter case within about 3/8" of the choke horn. I guess that's not a problem with no choke horn though.
As for air filters. if you run a K&N, a 14 x 3 is about as small as you'd want to go before the filter starts to restrict flow. Traditional paper elements are less forgiving and need to sized larger. An 11 x 4 offers the same filter area but the base on an 11" has zero drop so there may be other complications when the lid will be about 5" higher than the carb flange.
So you know where i have been for awhile. I thought going to the 4 inch cowl would solve most of this but nope it didn't but looking at your base it looks like i might be able to get it low enough to fit under the cowl Is yours offset at all?
Reply
Old Jan 23, 2013 | 10:29 AM
  #105  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by Johnny Blaze
Add a dual return spring to that carb!
had one lost it on the last rebuild just haven't gone and got another. the car hasn't been driven since the last rebuild.
Reply
Old Jan 23, 2013 | 10:33 AM
  #106  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
had one lost it on the last rebuild just haven't gone and got another. the car hasn't been driven since the last rebuild.
I failed tech at the drag strip because of one return spring. It had completely slipped my mind to re-install it. I was able to get another from a fellow racer.
I also got nailed for no locking dipstick on the trans but I was given an exemption if I taped it up tight. I always have a roll of electrical tape with me!

Last edited by skinny z; Feb 24, 2013 at 07:33 AM.
Reply
Old Jan 23, 2013 | 10:35 AM
  #107  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

LOL it's never been down the strip yet
Reply
Old Jan 23, 2013 | 10:42 AM
  #108  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
.... yet
....yet
Reply
Old Jan 23, 2013 | 10:50 AM
  #109  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

wife just ordered the 18X3 cake pan can't find locally. also sent her the 1 1/2 drop base to order. once the base is on and i know it fits under the cowl then i can put the offset in by attaching the cake pan offset. then trim the top of the pan to fit the hood contour then i should be all set for a gasket. now thats the plan but we will see how it goes
Reply
Old Jan 23, 2013 | 10:56 AM
  #110  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
wife just ordered the 18X3 cake pan can't find locally. also sent her the 1 1/2 drop base to order. once the base is on and i know it fits under the cowl then i can put the offset in by attaching the cake pan offset. then trim the top of the pan to fit the hood contour then i should be all set for a gasket. now thats the plan but we will see how it goes
Well, you'll be miles ahead of me in the fabrication department. I've made a commitment not to spend any time on the hotrod until spring. Too many other projects half finished. It's a good thing I don't consider the hours I spend researching and posting as "time spent on the hotrod"!
Good luck and be sure to post up with your progress.
Reply
Old Jan 23, 2013 | 11:12 AM
  #111  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

this year's projects for the hotrod are the cowl seal that we have been working on . forth gen seats leather, and a sub box that fits the hatch area. but it will also hold the 2 Nos bottles and a single alpine 10 that i have but have an area that is lit up with led's that will shine through .the attached photo so it will be lit up from behind i have to put plexiglass behind it to hold the letter cut outs . I have 2 one for the Iroc and one for the wall of the garage.
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-550941_4751346184490_1589578568_n.jpg   Cowl hoods and carb sealing *NOW WITH PICTURES*-545822_4735447787040_2070022917_n.jpg  
Reply
Old Jan 23, 2013 | 11:16 AM
  #112  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
So you know where i have been for awhile. I thought going to the 4 inch cowl would solve most of this but nope it didn't but looking at your base it looks like i might be able to get it low enough to fit under the cowl Is yours offset at all?
Just saw this post. The big block TA has a glass hood the completely open on the underside so an offset wasn't needed. It needs one of the All Star air pans posted earlier.
The dropped base fit with no issues than I can recall. (It's been 6 or 7 years).
Reply
Old Jan 23, 2013 | 11:22 AM
  #113  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
this year's projects for the hotrod are the cowl seal that we have been working on . forth gen seats leather, and a sub box that fits the hatch area. but it will also hold the 2 Nos bottles and a single alpine 10 that i have but have an area that is lit up with led's that will shine through .the attached photo so it will be lit up from behind i have to put plexiglass behind it to hold the letter cut outs . I have 2 one for the Iroc and one for the wall of the garage.
Nice artwork.
The IROC that I had prior to this coupe had a pair of 10" subs with a big Jensen amp and used the trunk well as an enclosure. Not uncommon I would think and quite effective. The coupe has a simple factory arrangement with an aftermarket head unit and speakers (no subs although they're ready to go should the need arise!). I usually listen to the engine when I drive.
Reply
Old Jan 23, 2013 | 11:27 AM
  #114  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Me too. motor sounds drown out the radio. more for show is the reason i have the radio and sub box in there i have a box for a 4th gen in there now but i want to incorperate the sign with led's behind it so i will redo it i also want to put in a dual bottle bracket to hold the bottles and have the bottles repainted to match the car. i have a nx kit and an extra nos bottle so a blue and white bottles won't look good together but 2 orange bottles will in this post you can hear the motor Post#8 is the video.
https://www.thirdgen.org/forums/engi...again-big.html
Reply
Old Jan 23, 2013 | 11:35 AM
  #115  
bestracing's Avatar
Senior Member
 
Joined: Sep 2004
Posts: 719
Likes: 0
From: N. Ky
Car: 86 T/A - 70 Z28/RS
Engine: Broke - 350
Transmission: 700R4 - M22
Axle/Gears: G80, 2.73 - ZQ9 G80 4.10
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
I missed this post.
Excellent pictures (which I've copied below). Another "cake pan" special. I've also attached a link to the McMaster Carr bulb seal that's needed to go around the cake pan rim.

http://www.mcmaster.com/#catalog/119/3456/=l5ryax

This is shaping up to be a "how to" thread rather than a request for information.
That McMaster part is what I was talking about when I post a link to that company that made universal trim seals. I like these better because they are of a sealed foam cell design. It's just a personal preference but I just don't like the open cell foam and that seal has a more "Factory" clean look to it.
Reply
Old Jan 23, 2013 | 11:35 AM
  #116  
Johnny Blaze's Avatar
Supreme Member
iTrader: (15)
 
Joined: Oct 2003
Posts: 3,449
Likes: 5
From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
LOL it's never been down the strip yet
Good to be safe on the street too!
Reply
Old Jan 23, 2013 | 11:38 AM
  #117  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
....in this post you can hear the motor
https://www.thirdgen.org/forums/engi...again-big.html
That's an understatement. Your sure won't be able to sneak up on anyone.
Reply
Old Jan 23, 2013 | 11:41 AM
  #118  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by bestracing
. It's just a personal preference but I just don't like the open cell foam and that seal has a more "Factory" clean look to it.
I agree with you on that one. I prefer the rubber seal too.
Once I start to fabricate this thing in earnest, I'll end up getting some the MaMaster Carr stuff. They have several sizes to choose from so finding one the fills the gap shouldn't be too difficult.
Reply
Old Jan 23, 2013 | 11:42 AM
  #119  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by bestracing
That McMaster part is what I was talking about when I post a link to that company that made universal trim seals. I like these better because they are of a sealed foam cell design. It's just a personal preference but I just don't like the open cell foam and that seal has a more "Factory" clean look to it.

I liked the seal you sent that looks like a rubber seal like the factory would use
Reply
Old Jan 23, 2013 | 11:45 AM
  #120  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
I liked the seal you sent that looks like a rubber seal like the factory would use
It'll fit onto the edge of the cake pan too. Very slick.
Reply
Old Jan 23, 2013 | 11:47 AM
  #121  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
That's an understatement. Your sure won't be able to sneak up on anyone.
the neighbors called the cops on me over teh weekend i took it for a small test drive down the street and i guess it rattled things in there houses i really dont know if it did or not but 4 neighbors called I laughed about it. i have one neighbor that autocrosses and runs road atlanta. with ls1 based bmw another neighbor that runs his race bikes up and down the street at about 50mph and no one calls on them but i idle down the street and and back and get 4 calls. It must be loud. the dynomax race bullets don't help sound to much . I might have to add a new exhaust to the project list this year
Reply
Old Jan 23, 2013 | 11:49 AM
  #122  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Like I said, I prefer the sleeper look, in appearence and sound.
Reply
Old Jan 23, 2013 | 11:50 AM
  #123  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
It'll fit onto the edge of the cake pan too. Very slick.
in the video it looked to just clip over the edge so if it does it would make it real easy to make work
Reply
Old Jan 23, 2013 | 11:54 AM
  #124  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
Like I said, I prefer the sleeper look, in appearence and sound.
Me too but the big block didn't like the 2 1/4 inch exhaust the car shook itself apart with 13.5 compression i couldn't get the air out fast enough through the 2 1/4 so i went to the 3 inch and didn't think it was going to be as loud as it is. photo attached is the same car different wheels and exhaust it looks completely different.
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-1986-iroc-z-658  
Reply
Old Jan 23, 2013 | 11:55 AM
  #125  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

You can see in the pic below how it would fit onto the lip of the pan. Much like some weatherstripping.
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-mcmaster-carr-bulb-seal.png  
Reply
Old Jan 23, 2013 | 11:58 AM
  #126  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
You can see in the pic below how it would fit onto the lip of the pan. Much like some weatherstripping.
Cool that would make it real easy since the pna is going to have different size lip all the way around. then use some wrinkle paint to paint the pan it should look pretty stock .
Reply
Old Jan 23, 2013 | 12:00 PM
  #127  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
Cool that would make it real easy since the pna is going to have different size lip all the way around. then use some wrinkle paint to paint the pan it should look pretty stock .
Checkout their catalogue for the different sizes available. You should be able to find something that fits and looks OEM.
Reply
Old Jan 23, 2013 | 12:03 PM
  #128  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

my main concern is still the distributor but i think i might have enough wiggle room to get around it. I see opening and closing the hood 1000 times in my near future. while test fitting
Reply
Old Jan 23, 2013 | 12:07 PM
  #129  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
my main concern is still the distributor but i think i might have enough wiggle room to get around it. I see opening and closing the hood 1000 times in my near future. while test fitting
At 18" across, that cake pan is pretty big. I'm not sure have the room considering that a 14" filter housing is almost on top of an HEI. I have a small cap distributor so the added clearence will be a bonus.
Maybe you should have ordered the offset base (with the 1 1/2" drop) to help with fitment. It's designed specifically to clear the HEI.
Edit: Then again it would probably throw off the cowl opening alignment.
Reply
Old Jan 23, 2013 | 12:14 PM
  #130  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

I thought the same thing . I need the offset about 3/4 so i have to rotate the offset to make it workyou know your probably right i probably need the 1 1/2 drop with offset
Reply
Old Jan 23, 2013 | 12:17 PM
  #131  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
I thought the same thing . I need the offset about 3/4 so i have to rotate the offset to make it workyou know your probably right i probably need the 1 1/2 drop with offset
This is why I'm going to try and build a prototype out of spare parts. Once I have the fit established, I'll get to searching the aftermarket to see what's available.
I'm pretty sure I'll have to build and use my own 3/4" offset to get the air filter centered. I haven't seen anything that comes close. It's 1 1/2" to clear the HEI or nothing.....so far anyway.
Reply
Old Jan 23, 2013 | 12:43 PM
  #132  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

I needed parts to fab this up so atleast now i have what i should need I think i will have to use and 3/4 offset with the 1 1/2 drop and put the cake pan on the intake under the carb
Reply
Old Jan 23, 2013 | 12:46 PM
  #133  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
I needed parts to fab this up so atleast now i have what i should need I think i will have to use and 3/4 offset with the 1 1/2 drop and put the cake pan on the intake under the carb
That all sounds good but keep in mind you'll have to build your 3/4" offset. I've found nothing that's suitable.
Reply
Old Jan 23, 2013 | 12:50 PM
  #134  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

I wonder if i could cut off the outer ring area of my offset base move that ring down the 1 1/2 inch make 3 tabs to weld it in that position and see if it would work that might be an idea also . that way i have teh offset and the 1 1/2 drop
Reply
Old Jan 23, 2013 | 12:55 PM
  #135  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
I wonder if i could cut off the outer ring area of my offset base move that ring down the 1 1/2 inch make 3 tabs to weld it in that position and see if it would work that might be an idea also . that way i have teh offset and the 1 1/2 drop
That may take more than a few tabs. It seems to me that you'll have to fill the resulting gap with some sheet metal, unless you have two bases to work with as I have in the picture below. If you look closely, you can see the offset. A little more trimming and I'll be 3/4" with room to spare.
Attached Images  
Reply
Old Jan 24, 2013 | 02:06 PM
  #136  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Cake pan is here now waiting for the drop base drop base is in Knoxville should be here tomorrow
Reply
Old Jan 26, 2013 | 12:24 AM
  #137  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Well everything showed up today once i got off of work I tested the 1 1/2 drop base it worked fine. cleared everything except there was no offset. so i cut the center ring out and ground off a lip on a different 9 inch base offset it and screwed it to the drop base put on my air cleaner and tested the fit. hood closed for the first time with my14X3 air cleaner. so the next step was to cut out the cake pan to put the air cleaner base on the cake pan. so I cut out a a hole in the center of the cake pan and attached the cake pan to the drop base. test fitted the whole unit on the car. no clearance issues. except for trimming to fit the hood when closed. I should have about 1/2 inch in the front and about 2 inchs in the rear. heres my progress so far.
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-740033_10200440069467194_115101702_o.jpg   Cowl hoods and carb sealing *NOW WITH PICTURES*-773593_10200440063667049_188137008_o.jpg   Cowl hoods and carb sealing *NOW WITH PICTURES*-798341_10200440072307265_2132977410_o.jpg  
Reply
Old Jan 26, 2013 | 12:25 AM
  #138  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

some more
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-774767_10200440066107110_2028793885_o.jpg   Cowl hoods and carb sealing *NOW WITH PICTURES*-775695_10200440061146986_809526748_o.jpg  
Reply
Old Jan 26, 2013 | 07:26 AM
  #139  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
Well everything showed up today once i got off of work I tested the 1 1/2 drop base it worked fine. cleared everything

as we expected it would...

except there was no offset.

expected that too...

so i cut the center ring out and ground off a lip on a different 9 inch base offset it and screwed it to the drop base put on my air cleaner and tested the fit. hood closed for the first time with my14X3 air cleaner.

excellent!...

so the next step was to cut out the cake pan to put the air cleaner base on the cake pan. so I cut out a a hole in the center of the cake pan and attached the cake pan to the drop base. test fitted the whole unit on the car. no clearance issues. except for trimming to fit the hood when closed. I should have about 1/2 inch in the front and about 2 inchs in the rear.

that's a little more clearence at the rear than I would have anticipated..

heres my progress so far.
Nice. I only wish I had done it first! As far a seal goes, do you think the Moroso foam installed more or less as the Monte article would work (providing you install it with the taper needed from front to rear) or are you inclined to try the bulb type rubber seal? A 2" gap is a fair bit to seal up. Maybe a deeper cake pan that can be trimmed so the whole works is within 1/2" of the hood would give the desired result. Then the rubber seal can be used.
That's an excellent bit of work. Like I said, I wish I had mine done too but the shop isn't heated and we're into our traditional January cold spell. -30 the other day and the shop is a no-man's land.
Reply
Old Jan 26, 2013 | 11:52 AM
  #140  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
Nice. I only wish I had done it first! As far a seal goes, do you think the Moroso foam installed more or less as the Monte article would work (providing you install it with the taper needed from front to rear) or are you inclined to try the bulb type rubber seal? A 2" gap is a fair bit to seal up. Maybe a deeper cake pan that can be trimmed so the whole works is within 1/2" of the hood would give the desired result. Then the rubber seal can be used.
That's an excellent bit of work. Like I said, I wish I had mine done too but the shop isn't heated and we're into our traditional January cold spell. -30 the other day and the shop is a no-man's land.
once it is cut down the front of the pan should about a 1/2 inch the rear should be about 2 inches leaving enough room for the seal either seal accually. i have to slowly trim it down until the hood closes the way it sits now the hood doesn't close with the cake pan but does close without it with just the air cleaner which it didn't do until i got the drop base you suggested. to be honest it needs some more work cleaning it up. almost like you said its a prototype. but nothing a grinder and a welder can't fix. the cke pan seems to be aluninum and so does the base which makes welding for me imposible.
Reply
Old Jan 26, 2013 | 01:21 PM
  #141  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

I came across aluminum with the 9" base that I'm using. Considering that it wasn't my intention to weld anyway, that's not much of an issue. One of my engineering buddies, who's also a racer has suggested using an epoxy to hold the works together. I like the idea over nuts and bolts or rivets in that if one of the fasteners ever comes apart then it may get drawn into the carb. That would be unpleasent.
I'm happy to see some results with this whole experiment. (There may be a market for this when we're done!)
Reply
Old Jan 28, 2013 | 09:45 AM
  #142  
bestracing's Avatar
Senior Member
 
Joined: Sep 2004
Posts: 719
Likes: 0
From: N. Ky
Car: 86 T/A - 70 Z28/RS
Engine: Broke - 350
Transmission: 700R4 - M22
Axle/Gears: G80, 2.73 - ZQ9 G80 4.10
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
Well everything showed up today once i got off of work I tested the 1 1/2 drop base it worked fine. cleared everything except there was no offset. so i cut the center ring out and ground off a lip on a different 9 inch base offset it and screwed it to the drop base put on my air cleaner and tested the fit. hood closed for the first time with my14X3 air cleaner. so the next step was to cut out the cake pan to put the air cleaner base on the cake pan. so I cut out a a hole in the center of the cake pan and attached the cake pan to the drop base. test fitted the whole unit on the car. no clearance issues. except for trimming to fit the hood when closed. I should have about 1/2 inch in the front and about 2 inchs in the rear. heres my progress so far.
Nice!!
Reply
Old Jan 31, 2013 | 09:27 AM
  #143  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

i took a few pics of it off of the car with some rubber seal on it. it is now cut down to fit under the hood fine. this is kinda a working prototype. i need to get it welded up so i can remove the nuts and bolts. or atleast find all matching new bolts with poly locks and locktite. i don't want them rattleing off and into the carb. when it is all put together you don't see any of the cuts but i know there there. so i would love to weld them up and then grind smooth for a more cleaner looking aircleaner.
Attached Thumbnails Cowl hoods and carb sealing *NOW WITH PICTURES*-842884_10200471823021013_423996085_o.jpg   Cowl hoods and carb sealing *NOW WITH PICTURES*-376213_10200471822781007_1345565919_n.jpg  
Reply
Old Jan 31, 2013 | 09:35 AM
  #144  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
i took a few pics of it off of the car with some rubber seal on it. it is now cut down to fit under the hood fine. this is kinda a working prototype. i need to get it welded up so i can remove the nuts and bolts. or atleast find all matching new bolts with poly locks and locktite. i don't want them rattleing off and into the carb. when it is all put together you don't see any of the cuts but i know there there. so i would love to weld them up and then grind smooth for a more cleaner looking aircleaner.
That looks great!!
A couple of questions: Whose dropped base is that? It has a nice form. Certainly a better design than the unit I'm cutting up.
Which seal? Is that from the McMaster catalog? It looks right at home in an OEM sort of way.
Well done.
Any pics with the filter in place? I'm curious as to what kind of space there'd be between the filter lid and the carb. You certainly don't want a restriction there.
Reply
Old Jan 31, 2013 | 09:45 AM
  #145  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by skinny z
That looks great!!
A couple of questions: Whose dropped base is that? It has a nice form. Certainly a better design than the unit I'm cutting up.
Which seal? Is that from the McMaster catalog? It looks right at home in an OEM sort of way.
Well done.
part number through summit pro-66808 $33.95
i had it 2 hrs before i cut it one thing is when you cut it for the offset you end up cutting off the carb flange so when you go to mount the aircleanerteh base hit my bowl level screws so i had to buy a carb air cleaner spacers


Spectre/Air cleaner adapter and riser kit









Part Number: 4950

the one i used is the front row left one. that raised it up enough to fit over the carb. the gasket is one a buddy brought over. not sure if i am going to use it or not i have to cut the whole gasket to make a slit for it to slide over the cake pan. i was looking at the site mentioned and it's like 7 bucks for the seal so i might just do that and be done with it or buy the chevelle gasket and be done and have the oem look to it .
Reply
Old Jan 31, 2013 | 09:56 AM
  #146  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

I have a base from a 9" filter case to use as the "offset ring" so the carb flange portion will remain intact. Hopefully that'll eliminate the need for a carb spacer. (I had thought you were doing the same too though).
I like the looks of the seal in the catalog. It has the split along it's length so the installation should be simple. The only thing to determine is the "height" of the seal itself.
Reply
Old Jan 31, 2013 | 10:22 AM
  #147  
jhainer's Avatar
Member
 
Joined: Jan 2007
Posts: 371
Likes: 1
From: Lawrenceville Ga
Car: 1986 BBC Iroc
Engine: 454
Transmission: th400
Axle/Gears: 3.42
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

i had a 9 inch one also but the flang where it rests on the carb was about a 1/4 inch where as the drop base flange was about 1 inch so i had to make up the difference.
Reply
Old Jan 31, 2013 | 10:26 AM
  #148  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

Originally Posted by jhainer
i had a 9 inch one also but the flang where it rests on the carb was about a 1/4 inch where as the drop base flange was about 1 inch so i had to make up the difference.
Underdstood.
Reply
Old Feb 23, 2013 | 09:03 AM
  #149  
redneckjoe's Avatar
Supreme Member
 
Joined: Sep 2011
Posts: 2,080
Likes: 34
From: Spring Hill, Fl.
Car: 87 iroc-z
Engine: 454
Transmission: th350
Axle/Gears: 3.73
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

i made a prototype, lol. im gonna duplicate it out of aluminum and tig weld it together. still need to get a seal. found out i had room for a 4 inch filter. just ordered a 14x4 filter with the extreme lid.
Name:  pinger_1283254114_zps96325a5f.jpg
Views: 4908
Size:  172.3 KB
Name:  pinger_1283253074_zps73890712.jpg
Views: 3820
Size:  174.7 KB
Reply
Old Feb 23, 2013 | 09:08 AM
  #150  
skinny z's Avatar
Thread Starter
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2005
Posts: 9,902
Likes: 874
From: 53.0907° N, 113.4695° W
Re: Cowl hoods and carb sealing *PICTURES REQUESTED*

That looks pretty good. If I had the open cowl that's the route I would have taken too.
This seal looks like it would work for you.

Reply



All times are GMT -5. The time now is 08:27 PM.