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1
Post By Frank Messina
07-11-2012, 04:13 PM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: Ft. Mitchell,
KY
Cobra Make, Engine: B&B, 428 FE, toploader
Posts: 151
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Not Ranked
How do I attach the vacuum advance hose
I had my engine rebuilt 600 miles ago and I noticed it doesn't run well at low rpm's. I searched and saw the thread on vacuum advance possibly affecting this so I just checked and there is no hose running to my distributer. I know that before it was rebuilt it was hooked up. I searched around for somewhere to hook it up again and don't see where it could go. I have a Genisis FE iron block , Edelbrock Performer intake, Mallory Unilite distributer and a Holley 850 double pumper. There is a hose coming off the back of the carb going into the right valve cover with a PCV. Any help will be greatly appreciated. Thanks in advance. Chas
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07-11-2012, 04:53 PM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
Check your distributor. If you have a vacuum advance unit it will have a pod attached to it with a nipple for a hose to attach to both the pod and your carb. If no pod, then you don't have a vacuum advance setup on your distributor or it is capped off by a rubber cap rending it inoperable.
My guess is you only have mechanical advance on that engine. I don't think that carb even has the outlets to connect a vacuum advance line if you did have a vacuum advance dizzy.
__________________
Jim
Last edited by jhv48; 07-11-2012 at 04:57 PM..
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07-11-2012, 05:07 PM
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Senior Club Cobra Member
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Join Date: May 2006
Location: Manteca,
Ca.
Cobra Make, Engine: None, sold it
Posts: 2,439
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Not Ranked
From the Holley web site for 850 CFM carbs.
•1 timed (spark) port, 1 full vacuum, and 1 PCV port
Is the "timed (spark) port the one that would connect to the vacuum advance on the dizzy?
If so, it should be in the front of the base plate for the carb.
__________________
Terry
"I may be paranoid, but that doesn't mean they are not watching me"
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07-11-2012, 05:42 PM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: Ft. Mitchell,
KY
Cobra Make, Engine: B&B, 428 FE, toploader
Posts: 151
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Not Ranked
Thanks Terry. I will go check it out. Jim, the distributer does have the vacuum pot on it. I am getting old but I know there was a hose to it before the rebuild last summer.
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07-11-2012, 05:50 PM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: Ft. Mitchell,
KY
Cobra Make, Engine: B&B, 428 FE, toploader
Posts: 151
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Not Ranked
Terry, you were absolutely right. There is a nipple with a cover over it. I didn't see it the first time because the fuel lines block the line of sight. Thanks for the help. Now all I need to do is go buy some rubber hose and hook it up. Chas
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07-11-2012, 06:35 PM
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Senior Club Cobra Member
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Join Date: May 2006
Location: Manteca,
Ca.
Cobra Make, Engine: None, sold it
Posts: 2,439
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Not Ranked
Chas,
Make sure that you get vacuum line. It is thicker walled and will not collapse.
__________________
Terry
"I may be paranoid, but that doesn't mean they are not watching me"
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07-11-2012, 08:19 PM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: Ft. Mitchell,
KY
Cobra Make, Engine: B&B, 428 FE, toploader
Posts: 151
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Not Ranked
Thanks for the heads up.
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12-18-2012, 12:44 PM
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CC Member
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Join Date: Dec 2004
Location: Yorba Linda,
CA
Cobra Make, Engine: FFR, V8, Manual Trans, Htr, Wipers, Radio Delete
Posts: 327
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Not Ranked
Make sure you use the manifold vacuum port for the advance, not ported.
Frank
__________________
FFR - V8, Manual Trans, PS, Inop Wipers, No Radio, Gas Mileage so-so
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