Ever installed an Edelbrock...
Posting Guru
Joined: Jun 2009
Posts: 1,509
Likes: 1
From: Wagener, SC
Edelbrock 8981 - Edelbrock Choke Block-Off Plates - Overview - SummitRacing.com
Thread Starter
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4wd Low
Joined: Apr 2012
Posts: 11
Likes: 0
That plate came with the intake manifold I purchased. It's for the manual choke. You will block it off if you have an electric choke.
The vacuum tree's from the factory intake don't fit the two holes I have on the aftermarket intake. I will need to make some I guess. Any idea's on this.
The vacuum tree's from the factory intake don't fit the two holes I have on the aftermarket intake. I will need to make some I guess. Any idea's on this.
Postmaster
Joined: Nov 2009
Posts: 4,575
Likes: 5
From: Broken Arrow , OK
The heat riser is different than a choke . It does help warm the truck up. An electric choke works off of voltage where a manual choke works off of a cable and lever run inside the cab.
The factory manifold should have one true vacuum port on the back of the manifold at 12:00 directly behind the carb. Then there should be 2 water passage NPT ports in the front. One is for the temp sender and the other is for a water temp activated vacuum valve tree.The valve has a constant source of vacuum running to it , but , is closed while the engine is cold. Once the water temp heats up it opens the vacuum valve for the emissions and then that tree is charged with vacuum.
I will go look at my OEM Ford 351W 4 bbl manifold and see if it has more than 2 plces for the vacuum trees.
The factory manifold should have one true vacuum port on the back of the manifold at 12:00 directly behind the carb. Then there should be 2 water passage NPT ports in the front. One is for the temp sender and the other is for a water temp activated vacuum valve tree.The valve has a constant source of vacuum running to it , but , is closed while the engine is cold. Once the water temp heats up it opens the vacuum valve for the emissions and then that tree is charged with vacuum.
I will go look at my OEM Ford 351W 4 bbl manifold and see if it has more than 2 plces for the vacuum trees.
Posting Guru
Joined: Jun 2009
Posts: 1,509
Likes: 1
From: Wagener, SC
Oh, foot in mouth moment....
I'm NOT using the manifold you have shown there. I use this one.
Edelbrock 2181 - Edelbrock Performer Intake Manifolds - Overview - SummitRacing.com
I don't have a clue what to advise you on yours.
Sorry...
I'm NOT using the manifold you have shown there. I use this one.
Edelbrock 2181 - Edelbrock Performer Intake Manifolds - Overview - SummitRacing.com
I don't have a clue what to advise you on yours.
Sorry...
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Postmaster
Joined: Nov 2009
Posts: 4,575
Likes: 5
From: Broken Arrow , OK
Those three bungs across the back loo like vacuum ports. If they are then plug the one you trying to fit the trees into and use them. You may need a reducer bushing on the smaller 1/4" NPT tree, but manifold vacuum is manifold vacuum.
That horizontal vacuum port looks to be 1/8" NPT . Just get a pipe plug that size and plug it.
That horizontal vacuum port looks to be 1/8" NPT . Just get a pipe plug that size and plug it.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
It's been forever since I've owned or worked on a 351W, but the attached pic is how my 400's factory manifold was originally configured (now running a Performer 400 and lots remained the same, I'm pretty sure even the sizes of the fittings (which should be standard pipe threads IIRC and such fittings can be gotten from the JY pretty easily in my experience)).
Thanks for posting pictures, they help.
Thanks for posting pictures, they help.
Thread Starter
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4wd Low
Joined: Apr 2012
Posts: 11
Likes: 0
It's been forever since I've owned or worked on a 351W, but the attached pic is how my 400's factory manifold was originally configured (now running a Performer 400 and lots remained the same, I'm pretty sure even the sizes of the fittings (which should be standard pipe threads IIRC and such fittings can be gotten from the JY pretty easily in my experience)).
Thanks for posting pictures, they help.
Thanks for posting pictures, they help.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
Very well could be, it looks like it's in the middle of a crossover passage that I guess could very well contain coolant but I have no idea what would connect to it if it is.
