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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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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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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.
 
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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.
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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
Russ
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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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