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Edelbrock FM255 vs. FM257

Posted By Florida_Phil 5 Years Ago
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Ted
Posted 5 Years Ago
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Florida_Phil (10/7/2019)
...I assume you could install a PVC with an FM255 intake?  In Ted's photos above, it looks like there isn't room.

Having a PCV valve while using the Edelbrock 255 intake is not a problem.  It’s just a matter of using a road draft tube valley cover (same at Thunderbird or later model car/pickup) and using a PCV valve grommet in the rear breather hole of that cover.  The ¼-20 threaded hollow stud does need to be cut down so it’s not preventing the PCV valve from seating securely in the grommet.  While the center vacuum port on the 255 manifold is a potential vacuum source for the PCV valve, either carburetor having a 3/8” vacuum port would also suffice.  Another option is to either drill and thread the back of the manifold for a PCV valve vacuum source or add a vacuum port to one of the carb spacer/adapters.



Lorena, Texas (South of Waco)


Florida_Phil
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There is an FM255 intake on EBay right now for $150..  It's rough and one of the mounting ears is broken off. Can this be fixed?

https://www.ebay.com/itm/Edelbrock-FM255-Dual-4-BBL-Intake-for-Ford-Mercury-Y-Block-239-256-272-292-312/283675689294?epid=1860107734&hash=item420c63814e:g:s~EAAOSwAchdzYQy:sc:USPSPriority!34474!US!-1




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Lord Gaga
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E-Z Fix!

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charliemccraney
Posted 5 Years Ago
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Yep.  Aluminum is much easier to work with than iron


Lawrenceville, GA
Rono
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I run dual Edelbrock 500 carbs on a FM 257 intake using Trans Dapt adapter plates in my 56 Customline.http://forums.y-blocksforever.com/uploads/images/7ab42441-4bc1-4438-8ee3-9539.jpghttp://forums.y-blocksforever.com/uploads/images/d5f72a99-af77-48c0-8ab0-fbc7.jpg

http://forums.y-blocksforever.com/uploads/images/4a19e870-e870-4f63-a0a4-db5b.jpg  Ron Lane,  Meridian, ID



Florida_Phil
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I was too late.  It sold this morning.


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NoShortcuts
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Phil.  Here's another eBay listing of an Edelbrock FM 255 2x4 intake.  This one looks like it doesn't need any repair work done on it.

I attempted to provide a link directly to the eBay page, but it would not work on the server involved!?!

Instead, consider accessing the eBay Motors home page and using the search box on that page to locate the eBay item number 113970844127

Suggestion: 

Consider making an offer to this seller indicating that he should look at eBay previous sale of Sept. 2nd, eBay item number 323899451287
NOTE: 
When you do the search for this previously sold item that I listed, it will show that no item is found.  Having done that, now click ADVANCED SEARCH which is just to the right of the SEARCH button you just used.  When ADVANCED SEARCH opens, you'll see the number you previously entered.  Below that you will see a blue button that reads SEARCH.  Before pushing that blue SEARCH button, check the box below it that reads Sold Listings. 

Hope this helps!  Good Luck!   Smile

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Florida_Phil
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Thank you!


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Florida_Phil
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Made an offer and the seller accepted.  Got it!!  Thanks for the tip. 


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Florida_Phil
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I have some questions for Ted. 

1. In the photos you posted above of the FM255 with two Holley 465s, you are not running progressive linkage. Is connecting both carb throttles directly OK for a street car with a manual transmission?

2. It looks like you removed the chokes on both carbs.  In Florida, I do not need a choke to start my engine.  Is a choke required with dual quads?

3. I see you did not connect the vacumn units like the carbs on a 425/427.   Is this OK?

4. Should I rejet the carbs or run them the way they are?

As always, thanks for your help.


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