. Ron B.
Drilling Intake for vacuum
Thread Starter
Instructor
Joined: Dec 2007
Posts: 245
Likes: 2
From: Jersey shore NJ
Drilling Intake for vacuum
I just read a few posts about drilling an rpm intake to put in new vacuum lines. I need to do the same thing because the one by the back of the # 8 intake is blocked by the new carb. ( you would think that edelbrock would know this? )
My question is does it matter where you put the vacuum port and does the intake thread easy?
I was thinking of putting it on the side of the intake under where the choke will be?
My question is does it matter where you put the vacuum port and does the intake thread easy?
I was thinking of putting it on the side of the intake under where the choke will be?
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
You need to locate it somewhere close to the central plenum area where the carb mounts and make sure there are enough threads to seal the fitting. The location of a LT-1 hi-rise is a little further out on the #8 cylinder runner than the Perf RPM intake, so you may be able to move it out further along the runner where it is now.
Pro
Joined: Feb 2007
Posts: 548
Likes: 1
From: Victoria VA
I had to drill my Performer RPM intake because my Holley blocked the one that came drilled. I drilled mine in the side of the #8 runner as close to the top as I could to get the port in. It drills easy and taps easy just make sure you use the right size drill bit no big deal. 
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
I just read a few posts about drilling an rpm intake to put in new vacuum lines. I need to do the same thing because the one by the back of the # 8 intake is blocked by the new carb. ( you would think that edelbrock would know this? )
My question is does it matter where you put the vacuum port and does the intake thread easy?
I was thinking of putting it on the side of the intake under where the choke will be?
My question is does it matter where you put the vacuum port and does the intake thread easy?
I was thinking of putting it on the side of the intake under where the choke will be?
Last edited by 2armor; Mar 19, 2009 at 01:01 PM. Reason: typo
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Le Mans Master
Joined: Nov 2008
Posts: 5,691
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From: columbus oh
Thread Starter
Instructor
Joined: Dec 2007
Posts: 245
Likes: 2
From: Jersey shore NJ
Thanks for the replies,
Yes there is a 3/8" nipple on the back of the carb. I was going to use that one for the brakes and PVC. I wanted another port for the headlights and auto trans.
I did see the 90 degree elbow to use, but it does not look like it will fit under the demon carb without a spacer.
Yes there is a 3/8" nipple on the back of the carb. I was going to use that one for the brakes and PVC. I wanted another port for the headlights and auto trans.
I did see the 90 degree elbow to use, but it does not look like it will fit under the demon carb without a spacer.
Pro
Joined: Dec 2008
Posts: 531
Likes: 0
From: Frisco TX
there is a 3/8" nipple on the back of the carb. I was going to use that one for the brakes and PVC. I wanted another port for the headlights and auto trans.
I did see the 90 degree elbow to use, but it does not look like it will fit under the demon carb without a spacer.
I did see the 90 degree elbow to use, but it does not look like it will fit under the demon carb without a spacer.
same boat here - frecking a-holes at edelbrock. If I had known the Holley 750 carb was gonna cover the port on my Air-Gap I would have bought a Weiand intake instaed.
I plan to use the nipple on the back of the Holley as well as there is not a chance of accessing the manifold port without a 1" carb spacer
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
Thanks for the replies,
Yes there is a 3/8" nipple on the back of the carb. I was going to use that one for the brakes and PVC. I wanted another port for the headlights and auto trans.
I did see the 90 degree elbow to use, but it does not look like it will fit under the demon carb without a spacer.
Yes there is a 3/8" nipple on the back of the carb. I was going to use that one for the brakes and PVC. I wanted another port for the headlights and auto trans.
I did see the 90 degree elbow to use, but it does not look like it will fit under the demon carb without a spacer.
Is my vette stock?? HAHA
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