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| Carter bbd idle circuit https://slantsix.org/forum/viewtopic.php?t=63938 |
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| Author: | matv91 [ Tue Aug 13, 2019 4:17 pm ] |
| Post subject: | Carter bbd idle circuit |
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| Author: | matv91 [ Tue Aug 13, 2019 4:18 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
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| Author: | matv91 [ Tue Aug 13, 2019 4:21 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
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| Author: | matv91 [ Tue Aug 13, 2019 4:25 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
Carter stopped giving the part sizes, last year 1969. After that measurement with drill bits is needed to tell size. |
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| Author: | matv91 [ Tue Aug 13, 2019 4:31 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
idle bleed in body 
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| Author: | matv91 [ Tue Aug 13, 2019 4:34 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
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| Author: | matv91 [ Tue Aug 13, 2019 4:37 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
checked early air bleed and later solid fuel carbs. That hole all ways .0472 |
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| Author: | matv91 [ Tue Aug 13, 2019 4:41 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
venturi screw 
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| Author: | matv91 [ Tue Aug 13, 2019 4:58 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
They all look the same, they are not. Different sizes of steel bushings pressed into hollow steel screw, the idle down channel. Blue is idle air bleed, carter called the first air bleed the bypass. Black is fuel entry, Yellow is idle Economiser, some times called idle channel restriction. in cluster screw acts like a main jet for idle circuit. Red is where stamped number is in line with dots. The econ bushing can be cleaned or size checked from bottom. Do not go past fuel entry holes . Same for top air bleed,check from top. Bushings can be different sizes. |
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| Author: | matv91 [ Tue Aug 13, 2019 5:14 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
https://www.abbottaerospace.com/whats-n ... ize-chart/ |
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| Author: | matv91 [ Tue Aug 13, 2019 5:28 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
  The wrong gasket, red arrow will block the idle down channel completely,
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| Author: | matv91 [ Tue Aug 13, 2019 5:42 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
Recent testing shows that different venturi screws can make a difference. For example screw with .067 air bleed and .055 econ. restriction replaced with[ common to slant six], screw with .063 air bleed ,richer and bigger econ. restriction, .059 more mixture down stream. Seems to make things better. |
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| Author: | Reed [ Tue Aug 13, 2019 9:22 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
This is great info! |
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| Author: | matv91 [ Mon Sep 02, 2019 12:32 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
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| Author: | matv91 [ Mon Sep 02, 2019 12:35 pm ] |
| Post subject: | Re: Carter bbd idle circuit |
Amc jeep specs 
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