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vacuum lines

Posted By shawniverse 16 Years Ago
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shawniverse
Posted 16 Years Ago
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I am installing 3 deuces on my 239.  The new manifold and carbs do not have any where good to hook up the vacuum lines for the vacuum advance and the power brakes.  Can I run them off the fuel pump? 

 

Shawniverse;  Ogden Utah

55Birdman
Posted 16 Years Ago
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If thats the only place you got . Try it and see. Should be ok

55Birdman Smile  Hickory NC
shawniverse
Posted 16 Years Ago
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Thank you.  I think the power brake will be okay there.  I was mostly worried about the vacuum advance one the distributor.  Some one was saying it had to be into the manifold or it would not work properly.

 

Shawniverse;  Ogden Utah

pintoplumber
Posted 16 Years Ago
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Have you changed your distributor to the 57 and up style? You need centrifugal advance and vacuum advance. I have 3x2 on my 239. When you open the 2 outer carbs,you loose your vacuum and the timing goes back to your initial timing.It doesn't run right. My vacuum is hooked up to the manifold.

http://forums.y-blocksforever.com/uploads/images/3047f5ac-add1-4e79-a3ed-14ea.jpg  Dennis in Lititz PA
shawniverse
Posted 16 Years Ago
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I have not changed mine over.  What is the difference?   So you are saying with it hooked in to the fuel pump when I open the other two carbs it will lose its vacuum?

 

Shawniverse;  Ogden Utah

GREENBIRD56
Posted 16 Years Ago
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Shawiverse - You need to hunt up the later style of distributor to go with your new multi-carb set-up. The old distributor won't have any mechanical advance - and I don't think I can predict how the vacuum only Load-o-Matic advance system will behave with the fuel / vacuum pump as the source. 

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 Steve Metzger       Tucson, Arizona
Hoosier Hurricane
Posted 16 Years Ago
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If I understand you correctly, you want to hook the vacuum advance directly to the fuel pump.  That will cause you to have full advance all the time, and if it doesn't fire up immediatly, you will even have full advance while you are cranking it, just as soon as the fuel pump makes one stroke.  This will not work right at all.  Heed the advice of others, put a later distributor in it.  You'll have to put the 239 gear on the later one, and change the oil pump and drive rod to a '55 or later.  Also change the cap and rotor to '57 and later.

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Ted
Posted 16 Years Ago
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Like has been mentioned, the ’57 and up distributor is the preferred way to go.  But add the following to what’s already been said.

 

You’ll need to determine exactly which distributor you have.  If it’s the older Load-O-Matic (vacuum operation only), the distributor vacuum line needs to hook to the center carb if you’re using staged or progressive linkage.  If using the Holley 94’s, the distributor vacuum port is already at the front of the carbs and just plug the dist ports on the end carbs.  Hooking up the vacuum line to the intake or a direct vacuum source with a L-O-M is not recommended.

 

If your distributor is the ’57 and up style and you opt to use the vacuum advance feature of the distributor, then hook the distributor up to a ported vacuum port at the carburetor.  The 94’s don’t have this port in stock form but they can be modified for one.  But recurving the ’57 and up distributor so it relies strictly on the mechanical advance feature and not using the vacuum advance chamber is also an option.

 

The power brake vacuum line needs to hook to the intake manifold or to a spacer that’s placed under one of the carbs.  The vacuum booster on the fuel pump does not provide an adequate supply of vacuum for a power brake booster that’s going to be used repeatedly in a very short period of time.

Lorena, Texas (South of Waco)


pintoplumber
Posted 16 Years Ago
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Not to discourage you, but do you have the intake with the small ports to fit the 239 heads?

http://forums.y-blocksforever.com/uploads/images/3047f5ac-add1-4e79-a3ed-14ea.jpg  Dennis in Lititz PA
shawniverse
Posted 16 Years Ago
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Last Active: 15 Years Ago
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Thank you for all of your advice I will look for a 57 distribtor.  As to the for the manifold with the smaller ports I am not sure.  I was running a 4 barrel manifold before off a 292 it ran great.  I got this one off of ebay I am not sure what it came off of.

 

Shawniverse;  Ogden Utah



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