Aug 2005
Tuning an Edelbrock carb on a Stude

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My personal experience with 1406's on non-performance small cube engines 
is that leaner secondary jets improve full throttle acceleration.   
Depending on what you are not liking about the performance would determine 
the changes you need to make.  If you are happy with initial acceleration 
but feel full throttle is lacking, try dropping the 95 secondary jet to a 
92.  Also, a little more timing advance may be necessary.  (erizzolo)
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Edlebrock jetting ( Pat Drnec)
1406 Edelbrock jetting ( out of the box) compared to an R1 (Stude Spec)
Primary jets:
Edelbrock 1406 - .098            AFB - .089

Secondary jets:
Edelbrock 1406 - .095            AFB - .077

Metering rods:
Edelbrock 1406 - .075 x .047     AFB - .058 x .069 
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( Best Results of tuning with an exhaust analyzer )
500 Edelbrock / 259 cid engine / 62 lark / FlightOmatic
.098 main and .101 secondary (sep 2005) 






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Jan 2006
 Edelbrock 9506S   (600CFM)
That carb (600 cfm 'stock' ..(economy)...is equipped as follows:
Metering Jets - Primary .098, Secondary .095; Metering Rods - .073 x .047; 
Step-Up Spring - orange (5" Hg)

A 500 cfm AFB (Performance) is equipped as follows:
Metering Jets - Primary .086, Secondary .095; Metering Rods - .065 x .052; 
Step-Up Spring - orange (5" Hg).

Jeff