damn demon
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,161
Likes: 0
From: pr, frederick md.
damn demon
im using a demon carb on an air gap manifold, the vacaum port in the manifold is blocked by the carb bowls. i cant use spacer under carb because its a vette ... no clearance... the main port from the carb is for my brakes. SO I HAVE NO PCV other than valve cover breathers. does anyone think this is a bad thing? guy at my speed shop says to use a vacaum canister for my brakes. i dont understand this one yet, and im not f...ing with my brakes! anyone? 
Burning Brakes
Joined: Aug 2002
Posts: 1,146
Likes: 10
From: Scottsboro Alabama
You need one of these.
I just ordered one today. http://www.c3sharktank.com/tech2/vacfitting/index.html
19.97 + 5.00 shipping
417-724-2118
19.97 + 5.00 shipping
417-724-2118
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
You will notice he is still using a spacer under his carb, the problem is lever on the secondary pump
You might be able to tap one of the rear runners on the Air Gap like I did on my VIc Jr, my Race Demon has no vacuum ports whatsoever
You might be able to tap one of the rear runners on the Air Gap like I did on my VIc Jr, my Race Demon has no vacuum ports whatsoever
Last edited by MotorHead; Sep 7, 2005 at 10:19 PM.
Burning Brakes
Joined: Aug 2002
Posts: 1,146
Likes: 10
From: Scottsboro Alabama
[QUOTE=MotorHead]You will notice he is still using a spacer under his carb, the problem is lever on the secondary pump.
Oops!, never thought about that. Oh well I'm using a spacer anyway.
Redc3, add to your list one spacer and drop base air cleaner or a drill bit and tap.......whichever you prefer.
Oops!, never thought about that. Oh well I'm using a spacer anyway.
Redc3, add to your list one spacer and drop base air cleaner or a drill bit and tap.......whichever you prefer.
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
Originally Posted by redc3
im using a demon carb on an air gap manifold, the vacaum port in the manifold is blocked by the carb bowls. i cant use spacer under carb because its a vette ... no clearance... the main port from the carb is for my brakes. SO I HAVE NO PCV other than valve cover breathers. does anyone think this is a bad thing? guy at my speed shop says to use a vacaum canister for my brakes. i dont understand this one yet, and im not f...ing with my brakes! anyone?
If you look at Motorheads pic, you'll see that he "T"d the vacuum line off the hole he tapped in the intake. Does your Demon have the vacuum port in the center rear of it's base? This is where I connected my vacuum line to and then "T"d like Motorhead did on his
You could also tie your PCV into the bottom of the air cleaner base as an option, some aftermarket air cleaners have a knock out for this.
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Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Older Than Dirt
I just ordered one today. http://www.c3sharktank.com/tech2/vacfitting/index.html
19.97 + 5.00 shipping
417-724-2118
19.97 + 5.00 shipping
417-724-2118
Instructor
Joined: Aug 2004
Posts: 204
Likes: 16
From: Holly Springs NC
If you dont mind me asking
redc3, what kind of hood clearance do you have with the air gap and the demon? Right now I have a performer w/ demon and very very little hood clearance, and was thinking airgap when I changed heads.
Instructor
Joined: Feb 2005
Posts: 153
Likes: 1
From: Monroe MI
Had the same problem after I went to a Holley. I bought a 3/8 pipe tap (which is the correct size for this hole) and tapped the hole in the intake. Pipe threads are tapered so the further down you run the tape the lower you can get the vacuum fitting in the intake. Then I put a chrome gardner wescott 90 degree fitting in it. It worked great!
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,161
Likes: 0
From: pr, frederick md.
Originally Posted by MotorHead
You will notice he is still using a spacer under his carb, the problem is lever on the secondary pump
You might be able to tap one of the rear runners on the Air Gap like I did on my VIc Jr, my Race Demon has no vacuum ports whatsoever
You might be able to tap one of the rear runners on the Air Gap like I did on my VIc Jr, my Race Demon has no vacuum ports whatsoever
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,161
Likes: 0
From: pr, frederick md.
Originally Posted by 75blackray
redc3, what kind of hood clearance do you have with the air gap and the demon? Right now I have a performer w/ demon and very very little hood clearance, and was thinking airgap when I changed heads.