Intake manifolds
Postmaster
Joined: Aug 2001
Posts: 4,270
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From: Delaware
Originally Posted by dutchlincoln79
i took the edelbrock 2171 adn i'm quite happy with it. I have no comparisation however.
Senior User
Joined: Nov 2007
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Originally Posted by lucky no. 7
i just got rid of a nice holley street dominator on ebay to a guy, ran real good for me but i went with the weiend 8010 instead
Postmaster
Joined: Aug 2001
Posts: 4,270
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From: Delaware
The Holley Street Dominator is an excellent manifold. It's very desireable for doing an EFI conversion, but being a single plane intake there will be some torque loss at low RPM with a carb. I ran an Edelbrock Streetmaster single plane on my 408, I didn't notice any problem, but a Dyno would show it.
I like the Weiand #8010 better than the Edelbrock #2171. I have one sitting in my garage waiting to go on my old 408 motor, if I ever rebuild it.
I like the Weiand #8010 better than the Edelbrock #2171. I have one sitting in my garage waiting to go on my old 408 motor, if I ever rebuild it.
Cargo Master
Joined: May 2003
Posts: 2,561
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From: Earth
I'm running the Weiand 8010 on my 410. Good dual plane manifold. From what I have read, it has a larger carb mounting surface than the Edelbrock manifold.
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Senior User
Joined: Nov 2007
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Would it be a good idea to run a 1 or 2 inch spacer under the carb with the holley manifold, or any aftermarket manifold for the 400? How does this impact perofrmance and fuel economy? I have read that a plastic spacer isolates the carb form manifold heat transfer which is better for perfomance and an aluminum spacer will transfer the heat which gives better economy, but what advantage do you get having either of these spacers versus no spacer at all.
OldBlue68,
Offenhauser also sells a manifold for the 400 and it has a pretty cool looking design. The intake port for each cylinder is split with the upper half being fed by the primaries and the lower half by the secondaries. I spoke to a guy that had one and he said it was the closest he had came to fuel injected performance with a carb. They are pretty spendy though, especially if you want the $100 EGR adapter. His was used with a 1406 edelbrock and he still wanted $325 for it.
OldBlue68,
Offenhauser also sells a manifold for the 400 and it has a pretty cool looking design. The intake port for each cylinder is split with the upper half being fed by the primaries and the lower half by the secondaries. I spoke to a guy that had one and he said it was the closest he had came to fuel injected performance with a carb. They are pretty spendy though, especially if you want the $100 EGR adapter. His was used with a 1406 edelbrock and he still wanted $325 for it.
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Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
The reports that I have heard on the Offy manifolds is that they do give you great low RPM throttle response, but they are more restrictive and don't perform as well at high RPM.
I don't think that the Weiand gives that much advantage over the Edelbrock Performer to make a change.
I don't think that the Weiand gives that much advantage over the Edelbrock Performer to make a change.
Posting Guru
Joined: Oct 2005
Posts: 1,017
Likes: 3
From: Longwood, Fl
Offy DP
I had one of those for a 460 once, never put it on though.
If you really want a let-down, take a look through the secondary opening, looking forward at the feed space for the front cylinders. The primaries feed down through the bottom openings to the cylinders and the secondaries feed through the upper openings. Being cast aluminum, the primary tubes to the lower level take up most all the space in the secondary feed area.
I can see where the torque down low comes from, but pitty the poor engine that needs mid-high range flow. Now the offy I think I would like is the single plane low riser model with a divider plate in the carb opening area. Looks like it would be great for EFI mods------what do ya think DL??
If you really want a let-down, take a look through the secondary opening, looking forward at the feed space for the front cylinders. The primaries feed down through the bottom openings to the cylinders and the secondaries feed through the upper openings. Being cast aluminum, the primary tubes to the lower level take up most all the space in the secondary feed area.
I can see where the torque down low comes from, but pitty the poor engine that needs mid-high range flow. Now the offy I think I would like is the single plane low riser model with a divider plate in the carb opening area. Looks like it would be great for EFI mods------what do ya think DL??
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
Originally Posted by benshere
Now the offy I think I would like is the single plane low riser model with a divider plate in the carb opening area. Looks like it would be great for EFI mods------what do ya think DL??
I am not sure that I have ever seen one of those. I think the divider plate is removable. Any single plane will work for EFI conversion. You can use a dual plane intake for EFI, but it takes extra work.
Posting Guru
Joined: Oct 2005
Posts: 1,017
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From: Longwood, Fl
Holly 2v street dom -351C
Just remembered, I have one of those---, it was on a 70 casting 2BBl 351C. Lucky guy got a Penn-Yann boat hull, we both left grinning 
. I guess that velocity is the key, but those passages sure does look small !
. I guess that velocity is the key, but those passages sure does look small !
New User
Joined: Jan 2008
Posts: 21
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I'm pretty new to this forum, and to the 400 engine as well. I was planning on getting the Weiand myself, because it seems to be just a tad cheaper, and Im not really looking to invest big bucks in my engine. Just rebuild close to stock with an uprgaded cam and 4 barrel intake & carb.