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 Carb Question: Emulsion package 
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Joined: Sat Mar 16, 2013 7:58 am
Posts: 80
My engine talked me into running two Dominators on my SBC. 427 CI 18 degree heads sheetmetal intake. Shift at 8600 RPM. Here is the question. The emulsion package is: 1-2 are blocked, 3,4,5 are .028. Why would this be done like that? 3 curcuit carb from a known carb shop. Thinking about changing to 1,3,5 at .028 and block 2and 4. Bob J


Mon May 22, 2017 5:08 pm
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Joined: Fri Feb 08, 2013 5:50 pm
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Go smaller, 3 .020 or .021. 1, 3 and 5.


Tue May 23, 2017 10:02 pm
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Joined: Sat Mar 16, 2013 7:58 am
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These metering blocks use 4-40 set screws for e-bleeds. They are billet blocks. Will have to try to drill some this weekend. Bob J


Tue May 23, 2017 11:53 pm
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Joined: Sat Jul 26, 2014 6:43 pm
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Mark, would the high speed bleed likely need to be changed also?....and which direction?


Wed May 24, 2017 6:54 am
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Depends on what the engine wants and the fuel, standard race gas try some .026's.


Wed May 24, 2017 9:28 am
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Joined: Sat Mar 16, 2013 7:58 am
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These carbs are billet main bodies from APD. They use a different size air bleed than a Holley or QFT. I need to find a place where I can buy one that size. Plus I am going to make one change at a time to see what difference it will make. Bob J


Wed May 24, 2017 2:32 pm
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Different size how? I've had one of their billet Dominators, it takes a standard 10-32 air bleed. If they get them from BLP the head may be smaller but the threads are the same.


Wed May 24, 2017 5:49 pm
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Joined: Sat Mar 16, 2013 7:58 am
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The head is smaller. and you are correct the thread size is the same 10-32. Is BLP the only place that I can get air bleeds with the smaller head? Bob j


Thu May 25, 2017 1:51 am
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If you want to save money get 10-32 and drill your own, but BLP is the only place with the small heads. Won't a standard bleed fit the hole? Pretty sure thats what came out of the one I had.


Thu May 25, 2017 9:50 am
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Joined: Sat Mar 16, 2013 7:58 am
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I already tryed the standard air bleed. I already tryed a brass set screw, that is how I found out they were 10-32. Tomorrow I will see how far they go down in the hole, just to make sure the set screw will not go too far down. Hopefully tomorrow I only work until mid-afternoon so I can take my time to drill the set screws. Bob J


Thu May 25, 2017 5:57 pm
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