540HemiCuda
Well-Known Member
7 minutes of good information from a very experienced guy:
One area that I think he could have been clearer on was what the the location of the air door on the secondaries does depending on that location. He touched on it but I feel he should have spent a little more time on the subject. I bring this up because I have seen a number of discussions/arguments on other web boards about it.
The point is whether the door or flap is ABOVE or BELOW the boosters.
If the door is ABOVE the boosters, it is an enrichment device. You know, like a choke. Whether on the primaries or on the secondaries, restricting the air flow ABOVE the boosters BOOSTS the pull on the boosters and therefore pulls more fuel through them.
If the door is BELOW the boosters, it is again restricting the air flow ( much like a vacuum secondary carb) but is NOT exerting additional pull on the boosters because it is BELOW them. The door is acting as a control of the air flow limiting the CFM to the amount the engine can actually use........IF and WHEN it is tuned properly.
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One area that I think he could have been clearer on was what the the location of the air door on the secondaries does depending on that location. He touched on it but I feel he should have spent a little more time on the subject. I bring this up because I have seen a number of discussions/arguments on other web boards about it.
The point is whether the door or flap is ABOVE or BELOW the boosters.
If the door is ABOVE the boosters, it is an enrichment device. You know, like a choke. Whether on the primaries or on the secondaries, restricting the air flow ABOVE the boosters BOOSTS the pull on the boosters and therefore pulls more fuel through them.
If the door is BELOW the boosters, it is again restricting the air flow ( much like a vacuum secondary carb) but is NOT exerting additional pull on the boosters because it is BELOW them. The door is acting as a control of the air flow limiting the CFM to the amount the engine can actually use........IF and WHEN it is tuned properly.
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