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Anybody know Holley carburetors ?


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#1 propane1 ONLINE  

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Posted March 16, 2016 - 01:55 PM

I am wondering if there is an adjustment for the little arm between the primary and secondary plates. I believe it keeps the secondaries from opening to soon when opening the primaries. The secondaries are not suppose to start opening until the primary plates are opened to about 40 degrees. This is a vacuum operated secondaries. Thanks for any ideas.

Noel

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#2 crittersf1 OFFLINE  

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Posted March 16, 2016 - 02:50 PM

"Vacuum" assisted carb. IF everything is working correctly the carb will work without that arm being there. If it's opening too early you need a stiffer spring in the dashpot


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#3 ducky OFFLINE  

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Posted March 16, 2016 - 02:54 PM

I believe that rod was used to hold the secondaries closed when the primaries are closed.

Check here for more info.


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#4 toppop52 OFFLINE  

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Posted March 16, 2016 - 02:57 PM

You can buy kits with multiple springs for adjusting how soon and how quickly the secondaries open. Summit, Jegs, etc...
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#5 toppop52 OFFLINE  

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Posted March 16, 2016 - 02:59 PM

I believe that rod was used to hold the secondaries closed when the primaries are closed.
Check here for more info.


Correct, prevents leakage at low throttle settings that would cause rough, fast or no idle.
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#6 Bill 76 ONLINE  

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Posted March 16, 2016 - 04:20 PM

In one word--no--  no adjustment is required or recommended  on the rod , although many hot-rodder's do try and tweek them thinking they may find some magical horse power-but its not going to happen--As previous posters said its there to hold the secondary closed and 

to prevent it from overriding the primary plates in the case of high vacuum at part throttle opening-- kind of a safety thing .   

Yours does look like it has been modified thou.

 

Its all controlled by vacuum and spring tension


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#7 propane1 ONLINE  

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Posted March 16, 2016 - 04:36 PM

Great, thanks for the information. It is holding the secondaries closed while the primaries are closed. Yes, someone welded the little rod together. That's why I was wondering about adjustment.

Noel




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