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hole size difference between 2v and 4v air cleaner

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russosborne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russosborne Quote  Post ReplyReply Direct Link To This Post Topic: hole size difference between 2v and 4v air cleaner
    Posted: 15-May-2017 at 7:59PM
1972 351C 2v engine if it matters.
Talking about the round hole that fits on the carb.
I know they are different, but not having a 4v one around I was wondering how much difference, as in could you modify a 2v cleaner to fit on a 4v carb.

Will be going with an aftermarket 4v carb (Edelbrock most likely, not a fan of Holley) when I get this back together. I would rather not have to buy a 4v air cleaner, as my plans may include some major hacking on it.

Do they still sell the adapters to fit different air cleaners on to different carbs? I haven't played with this stuff since the 1980's or even before.

Thanks,
Russ


Edited by russosborne - 15-May-2017 at 8:00PM
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aquartlow View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote aquartlow Quote  Post ReplyReply Direct Link To This Post Posted: 15-May-2017 at 10:57PM
IIRC, both should be same size @ 5 1/8"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote picon3 Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 3:54AM
Originally posted by aquartlow aquartlow wrote:

IIRC, both should be same size @ 5 1/8"
X 2 
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Big Bird View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Big Bird Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 10:37AM
An Edelbrock carb won't fit under either air cleaner.
If you are set on an Edelbrock and a stock steel air cleaner, look into getting a cheap chrome air cleaner without a drop base and cut out the base of the stock air cleaner and weld the chrome base into the center. It will be an inch or two taller.
 
The above post should be read in a "Grumpy Old Man" voice.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 12:01PM
an air cleaner spacer might do the trick if you have the room under the hood to raise it up
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Power Surge Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 12:05PM
I'm planning on putting a stock air cleaner on my 351 cj with a streel demon carb. I've already got a 1 inch air cleaner spacer, so hopefully that will do it.
Sal Mennella
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Big Bird Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 12:34PM
with an Eddy, the fuel bowls are on the sides, so it's a REALLY wide carb, especially with the A/T linkages.
Short of fabbing/splicing an entire new base plate, you would need an obnoxious sized spacer, and then the drop base is a restriction/disruption to airflow.
The above post should be read in a "Grumpy Old Man" voice.
Almost forgot: "Get off my lawn!!!"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Power Surge Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 3:36PM
Originally posted by Big Bird Big Bird wrote:

with an Eddy, the fuel bowls are on the sides, so it's a REALLY wide carb, especially with the A/T linkages.
Short of fabbing/splicing an entire new base plate, you would need an obnoxious sized spacer, and then the drop base is a restriction/disruption to airflow.

Street Demon is the same type of carb. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 6:27PM
Originally posted by Power Surge Power Surge wrote:

Originally posted by Big Bird Big Bird wrote:

with an Eddy, the fuel bowls are on the sides, so it's a REALLY wide carb, especially with the A/T linkages.
Short of fabbing/splicing an entire new base plate, you would need an obnoxious sized spacer, and then the drop base is a restriction/disruption to airflow.

Street Demon is the same type of carb. 
IDK but i thought demon carbs were a holley knock-off
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russosborne Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 8:21PM
Thanks, guys.
Figures that nothing I want to do is simple. Of course the way things are going I may never get back to the Ranchero anyway.
Didn't know that they sold spacers like the ones above.
This is what I have experience with from the old days, would need them when installing an aftermarket air cleaner.
http://www.ebay.com/itm/SPECTRE-4952-Air-Cleaner-Carburetor-Spacer-Riser-5-1-8-to-2-barrel-2-5-8-/381869355695?hash=item58e92ff2af:g:sXgAAOSw2xRYP6AV&vxp=mtr
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russosborne Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 8:27PM
Oh, so what is/are the differences between a 2v and a 4v air cleaner? Just a label, or are there real differences?
Thanks,
Russ
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Power Surge Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 9:12PM
Originally posted by russosborne russosborne wrote:

Oh, so what is/are the differences between a 2v and a 4v air cleaner? Just a label, or are there real differences?
Thanks,
Russ


The only difference is the 4v air cleaner has a vacuum valve and flapper door on the driver's side that opens under load to let more air in.
Sal Mennella
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Power Surge Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2017 at 9:14PM
Originally posted by californiajohnny californiajohnny wrote:

Originally posted by Power Surge Power Surge wrote:

Originally posted by Big Bird Big Bird wrote:


with an Eddy, the fuel bowls are on the sides, so it's a REALLY wide carb, especially with the A/T linkages.
Short of fabbing/splicing an entire new base plate, you would need an obnoxious sized spacer, and then the drop base is a restriction/disruption to airflow.


Street Demon is the same type of carb. 
IDK but i thought demon carbs were a holley knock-off


The street demon is wide left to right instead of front to back just like an Edelbrock or a Carter carburetor.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 18-May-2017 at 4:00AM
there are Holley type and Carter type Demon carbs, depends which specific Demon carb you're talking about
i don't think it'll take all that much spacer?
there's also a banjo fitting for the fuel line that reduces the problem 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 18-May-2017 at 2:08PM
FWIW, the stock air breather fits my Holley without issue.  No spacers or any other mods needed.
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