Just wanted to get an idea of where your settings are for those of you with a 500avs. Mine as of now is:

primary - base
secondary- base
needle- .068 x .052
spring- pink
acc pump- middle

My timing is 16* init + 16* mech with no vac on Mallory diz.
268 cam .016in .018ex

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'72 4 dr Dart
'63 4 dr Dart

I'm running an Edelbrock performer 1404, but they should be close if not the same Carb.

Primary - base
Secondaries - 1 step up
Needles - Base
Accelerator - outer hole
Orange springs

Timing 18* initial, 9* mechanical (I believe), not sure on the vacuum. Still have to map it. But she runs great!

My 500avs is setup like this:

primary: 3 steps richer
secondary: 2 steps richer
step up spring: 7.5hg
needles: base
accelerator pump: base
secondary valve spring: 3 full turns past no resistance

Ignition setup:

initial: 10* BTDC
total: 31.5* all in at 3000 rpms
vacuum advance hooked up and setup to eliminate surging.

The car runs great, best time of 8.31 in the 1/8 mile and 20mpg at 3000 rpms.

Sounds rich but I'm guessing elevation has something to do with that?

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'72 4 dr Dart
'63 4 dr Dart

I'm having trouble tuning mine also my engine runs way too rich even with small jets, anyone got any ideas to overcome this problem?

Have you checked your float level?

No I haven't I assumed it should be ok because it's a new carbi out of the box. What float setting do you guys run.

It should be 7/16 from the air horn gasket.

Don't "assume", in mine the floats weren't adjusted correctly and the inlet needles leaked. Either of which would cause a "rich" carburetor.

Same here.... Mine measured out at 7/16 without the airhorn gasket. Instructions with the Carb say to hold the gasket in place and use a 7/16 drill bit to gauge float height.

Cheers I'll check it out tonight and see what I've got.

The float level was way out no where near 7/16. I set the floats and it seems to be a lot better. Bit more tuning and she should be running a bit better. Thanks fellas.