Edelbrock Performer Carb Users - Quick ?
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Edelbrock Performer Carb Users - Quick ?
Can you tell me if the port circled in the picture below is a vacuum port that I could use to connect to the evap canister on my 76? It is the only port not being used and I need to hookup my evap canister to the carb somehow.
Thanks For The Help
Thanks For The Help
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
I don't think so. Mine has a vac operated valve on it. The deal is on the canister, it gathers up fumes while the motor is off, then dumps the fumes into the carb by way of the air cleaner. Mine is an 81 and has about 6 hoses connected to the canister. I think you said yours has 3? 1 for the tank, one for the fuel bowl and the last one should be the exit to the air cleaner.
I'll take a look at mine this afternoon and see if that makes sence for yours, But I am pretty sure there is no direct vac signal connected to the canister unless it is to control a valve.
I'll take a look at mine this afternoon and see if that makes sence for yours, But I am pretty sure there is no direct vac signal connected to the canister unless it is to control a valve.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Originally Posted by SIXFOOTER
I don't think so. Mine has a vac operated valve on it. The deal is on the canister, it gathers up fumes while the motor is off, then dumps the fumes into the carb by way of the air cleaner. Mine is an 81 and has about 6 hoses connected to the canister. I think you said yours has 3? 1 for the tank, one for the fuel bowl and the last one should be the exit to the air cleaner.
I'll take a look at mine this afternoon and see if that makes sence for yours, But I am pretty sure there is no direct vac signal connected to the canister unless it is to control a valve.
I'll take a look at mine this afternoon and see if that makes sence for yours, But I am pretty sure there is no direct vac signal connected to the canister unless it is to control a valve.
I think we have pretty much established that the other hose must connect directly to the carb and no where else. I just need to know if that port in the link above is a vacuum port. I would need to borrow some tools to check it out myself so I was hoping that someone here on the forum was hopefully running a Edelbrock Performer carb and has the line connected to the evap canister so they can tell me which port it is. If it is not the one circled, then my carb has no place to connect it directly to it
Melting Slicks
Joined: Jan 2005
Posts: 3,028
Likes: 0
From: Madison Ms
Uh.......those ports are for the vac attachment from the distributor. You canister should be connected to the intake manifold towards the firewall right behind the carb......I think? Not sure on this.........
The only line I have hooked to my eB carb are the brake booster, Pcv, and vac advance from distrib.
The only line I have hooked to my eB carb are the brake booster, Pcv, and vac advance from distrib.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Aargh, this is getting frustrating because everyone is telling me something different. The years are very different in how the evap canister hooks up and even how many hoses it has. Unless you have a 76 with an evap canister with two hoses or know %100 how it hooks up on a 76.....please don't confuse me further. I had started this thread separate to just find out what the port was on the carb because I though we already determined how a 76 with only two hoses on the evap canister is supposed to hook up (and that was directly to the carb), but I guess that is not the case. I guess I will need to revive my thread on the evap canister and see how in the hell a 76 with only two hoses is supposed to connect up.
I will take a pic of the canister when I get home to clear up the confusion on how many hoses there are.
I will take a pic of the canister when I get home to clear up the confusion on how many hoses there are.
Last edited by MartyW; Jul 18, 2006 at 03:35 PM.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Below are two pics of the evap canister. It is very difficultto get a camera there and tougher to get it to focus. The circled hose is connected to metal line that runs the length of the nehicle back to the gas tank. The other hose is the one that I was told by many people was the hose that should connect directly to the carb (this is on a 76). My first post on this thread has a pic of the front of the edlebrock carb and I need to know firstly if that is correct that the hose should connect directly to the carb, and secondly that the port circled on the front of the carb is an appropriate port to connect the hose to.
Thanks Again all and I appreciate the assistance. The car is finally becoming what I would call presentable. No where near show quality.....but presentable.
Thanks Again all and I appreciate the assistance. The car is finally becoming what I would call presentable. No where near show quality.....but presentable.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
OK, looks like your missing something. There should be a Purge TVS or solenoid on there somewhere. The evap canister does not operate all the time. It collects fumes while the engine is off, then when you start up it purges into the carb. I can't find anything on the web for vac line diagrams for your year. Did you get a service manual? If not get the GM repro for your year. My book is for an 81 and the efe system is more involved.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
I do have the AIM for my year but 'It reads like stereo instructions'
j.k. - Stereo instructions are easier to read, but I could not resist the 'Beatlejuice' reference.
I will try and find the section in the AIM where it shows the evap canister and I will see if there is something missing on mine or if that is how it is supposed to be.
j.k. - Stereo instructions are easier to read, but I could not resist the 'Beatlejuice' reference.
I will try and find the section in the AIM where it shows the evap canister and I will see if there is something missing on mine or if that is how it is supposed to be.
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Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Finally found where in the AIM they explain the evap canister. On my 76mine is completely intact and there are only two lines connected to the canister. It does show the one hose connect to the fuel vapor pipe and the other is connected directly to the front of the stock carb. I no longer have a stock carb, its an Edelbrock Performer......so back to my original question.
Is the front port pictured in the link on my first post the correct port to connect the hose to the evap canister? It definately sounds and looks like it is the correct port, but it make me wonder why the engine builders would not have connected it when rebuilding everything. I wish the Performer pdf document that I have had a diagram of the front of the carb with the ports labeled.
Now that the issue about whether there should only be two hoses is cleared up, I just need to verify that the port on the front of the Performer carb would be appropriate to connect the hose to.
Is the front port pictured in the link on my first post the correct port to connect the hose to the evap canister? It definately sounds and looks like it is the correct port, but it make me wonder why the engine builders would not have connected it when rebuilding everything. I wish the Performer pdf document that I have had a diagram of the front of the carb with the ports labeled.
Now that the issue about whether there should only be two hoses is cleared up, I just need to verify that the port on the front of the Performer carb would be appropriate to connect the hose to.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Originally Posted by Bob Onit
What was the previous carb and where did the canister connect to?
ps: Is the carb in the picture a Weber?
ps: Is the carb in the picture a Weber?
The carb is an Edelbrock Performer Series carb (according to the last owner and the build sheet I got with the car) although I do remember seeing Weber stamped into the metal on the side of the carb.
Intermediate
Joined: Mar 2002
Posts: 31
Likes: 0
From: Benton IL
Yes MartyW
That is a vac. port, but it may be ported meaning engine won't have vac there until off idle (RPM's up a bit). My old head isn't what it used to be (brain fad). If you need full time vac. then use vac port behind carb.
That is a vac. port, but it may be ported meaning engine won't have vac there until off idle (RPM's up a bit). My old head isn't what it used to be (brain fad). If you need full time vac. then use vac port behind carb.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Originally Posted by Ronny
Yes MartyW
That is a vac. port, but it may be ported meaning engine won't have vac there until off idle (RPM's up a bit). My old head isn't what it used to be (brain fad). If you need full time vac. then use vac port behind carb.
That is a vac. port, but it may be ported meaning engine won't have vac there until off idle (RPM's up a bit). My old head isn't what it used to be (brain fad). If you need full time vac. then use vac port behind carb.
I will hook it up tonight and hopefully will get a chance to drive it in the next fews days and see if I have any problems.
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Originally Posted by MartyW
There is no other port on the carb so I guess I will connect it to the one of the front. I am not sure if it needs vacuum all the time or not, but I do not think that it does. Even if it gets no vacuum at idle, thats better than no vacuum at all I would assume.
I will hook it up tonight and hopefully will get a chance to drive it in the next fews days and see if I have any problems.
I will hook it up tonight and hopefully will get a chance to drive it in the next fews days and see if I have any problems.
Start the engine,put your finger over the hole... if you feel vacuum at idle than thats the one you need
If you dont feel any vaccum, open the throttle a little, if you feel vacuum than its a ported vacuum which is not the proper port
In this case you will need to TEE off the vacuum port behind the carb.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Checked the front port on the carb and it definately had vacuum when the car was at idle. I did not use a device to measure so I do not know how much vacuum it had, but it would hold a piece of paper against it at idle even with the clutch fan going and blowing all over and I could feel it a little with my finger.
I connected the evap hose to it and ran the car for a while and everything seemed like it was running normal. I will take it for a longer drive this weekend and see how it behaves.
Thanks all for the help. Was definately a surprise for me to find a hose connected to nothing so I am glad that it is hooked up properly now with no loss of power.
I connected the evap hose to it and ran the car for a while and everything seemed like it was running normal. I will take it for a longer drive this weekend and see how it behaves.
Thanks all for the help. Was definately a surprise for me to find a hose connected to nothing so I am glad that it is hooked up properly now with no loss of power.
Racer
Joined: Nov 2004
Posts: 432
Likes: 0
From: Granbury TX
Originally Posted by MsVetteMan
Uh.......those ports are for the vac attachment from the distributor. You canister should be connected to the intake manifold towards the firewall right behind the carb......I think? Not sure on this.........
The only line I have hooked to my eB carb are the brake booster, Pcv, and vac advance from distrib.
The only line I have hooked to my eB carb are the brake booster, Pcv, and vac advance from distrib.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Attached are two pics from my 76 Corvette Assembly Manual. In the first pic it shows the evap hose connected directly to the front of the carb. In the second pic it shows the other evap hose connected to the fuel vapor pipe that runs back to the gas tank. The manual continues to show diagrams of how the fuel vapor line connects to the fuel tank. I would not be surprised if the 76 vette was constructed in different manners in respect to the evap canister but if my manual shows it connected this way I am sure it would not be a problem if I left mine hooked up this way.
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Originally Posted by MartyW
Attached are two pics from my 76 Corvette Assembly Manual. In the first pic it shows the evap hose connected directly to the front of the carb. In the second pic it shows the other evap hose connected to the fuel vapor pipe that runs back to the gas tank. The manual continues to show diagrams of how the fuel vapor line connects to the fuel tank. I would not be surprised if the 76 vette was constructed in different manners in respect to the evap canister but if my manual shows it connected this way I am sure it would not be a problem if I left mine hooked up this way.
Both of those pics show FULL vacuum ports.
Wether you get it drom the carb or the intake it will work
I can tell you that my PCV is hooked to the large front port on my Quadrajet...My Brake booster is hooked to the large threaded inlet on the rear of the QJ
There used to be a T on my PCV which went to the cannister which = vacuum leak....when I removed the T and hooked the PCV directly to the front of the QJ the idle smoothed out instantly.
All I can say is... I do not know where or how your cannister is supposed to be routed...We still dont know the model of the Edelbrock carb (unless I missed a post)
If it's anything like a QJ you will have a ported tube on the drivers side, a large FULL vacuum tube in the center and a full vacuum tube on the passenger side
On the rear may be a threaded FULL vacuum port which normally goes to the brake booster. If not , then use the port on the Intake just behind the carb
Look around on the carb for a number or something that says Webber
My guess its a 14xx series
Last edited by Bob Onit; Jul 20, 2006 at 04:18 AM.
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Originally Posted by MsVetteMan
Uh.......those ports are for the vac attachment from the distributor. You canister should be connected to the intake manifold towards the firewall right behind the carb....
As a matter of fact, Im sure it isnt ported...obviously
And what distributor has the need for 2 vacuum lines?
