Choosing a carburetor

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So all in all, I would have to say there's definitely something to be said in favor of sizing the carb as close as you can to what the engine actually needs. The Q-jet is damn hard to beat but if it has a downside it's that you have to learn how to tune it. The secondary side is easy as pie to tune- everything needed is external. It's the primary side that you have to open the carb up to tune almost anything except the APT (as long as you've got a removable APT plug) and the idle mixture. And there's a little more to taking the top off a Q-jet than the front bowl off a Holley.
 
So all in all, I would have to say there's definitely something to be said in favor of sizing the carb as close as you can to what the engine actually needs. The Q-jet is damn hard to beat but if it has a downside it's that you have to learn how to tune it. The secondary side is easy as pie to tune- everything needed is external. It's the primary side that you have to open the carb up to tune almost anything except the APT (as long as you've got a removable APT plug) and the idle mixture. And there's a little more to taking the top off a Q-jet than the front bowl off a Holley.
  
Regardless of what carb you get, the trans TV cable adjustment is super critical. It has to be right or the trans will fail.  
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Regardless of what carb is used, if using a GM OD automatic tranny the trans TV cable adjustment is super critical. It has to be right or the trans will fail.  
  
 
The following will give some insight into the various makes and models of carbs that are readily available.
 
The following will give some insight into the various makes and models of carbs that are readily available.

Revision as of 12:09, 26 January 2012

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