1/2 inch cp3 fuel fitting - Diesel Bombers

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1/2 inch cp3 fuel fitting

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Old 08-08-2012, 07:34 AM
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Default 1/2 inch cp3 fuel fitting

So while i had my engine out i decided to do some improvements on the cp3 on my engine.
One of the things i did was make a 1/2 fuel fitting for the supply for the cp3.
Most of the 1/2 fuel fittings you see out there are still too restrictive because it bottlenecks down to a smaller fitting when it reaches the part that threads into the pump.

The stock 3/8 fitting Has an inner diameter of .232" with equates to about .0422 square inches.

The modified fitting i made was pieced together with a half inch ac line fitting and a M12x1.5 to jic. i cut the jic part off and welded the ac fitting on to it and that took care of the 1/2 inch hose part.

The M12x1.5 fitting on the other side still had to be taken care of so i bored out the fitting from .232" to .295". i could of probably squeezed out more of it, but i was pushing it already.

The area had increased to .683 inches squared resulting in about a 62% increase of flow capability.

Here are some pictures of the fitting.

Side by side difference:



Size difference between both fittings on the side that goes into the cp3:



the 1/2 inch fuel line attached:



Clearance with a modded wire harness:

 
Attached Thumbnails 1/2 inch cp3 fuel fitting-20120802_185238.jpg   1/2 inch cp3 fuel fitting-20120802_185116.jpg   1/2 inch cp3 fuel fitting-20120802_232803.jpg   1/2 inch cp3 fuel fitting-20120802_205730.jpg  
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Old 08-08-2012, 08:34 AM
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Nice write up! Where there any noticeable differences after the modification?
 
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Old 08-08-2012, 09:41 AM
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dont know
truck is still in pieces right meow.
 
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Old 09-16-2014, 07:02 PM
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I know this is a old thread but I just did a search on this and want to know if it is worth doing?
 
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Old 09-24-2014, 08:31 PM
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well not worth paying 50 dollars for a ppe one i tell you whut
 
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Old 09-25-2014, 02:08 PM
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Thanks that answers my question.
 
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Old 09-26-2014, 05:36 PM
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i dont like paying for things that can be easily made. like thier high flow fuel fittings that sell for 40+ all that is needed is 1/8 drill bit to modify you existing one, the only thing is that u have to make 100% sure that there are no burrs left when u re install it.
 
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