AVS secondary valve adjustment

[salinasjoel]

Anyone have any tips on how properly set this up for street use? I've got a 273 and have only ever had carbs with vacuum secondaries. Should I feel the secondaries kick in? Where about should they kick in. Is it a drive stop adjust drive again process? Thanks

 

[67Dart273]

Generally speaking if you feel a big sort of (............) insert descriptive word, at the time of firewalling the throttle, the spring is set too weak. The higher the RPM, the less this is so, or the quicker it happens.

It's a simple matter of experimentation. If the "feel" you get seems to make you think it's bogging, it probably IS. SImply tighten it up until you know it's "not."

Make sure the choke is open. Make sure you physically check that the throttle linkage is ACTUALLY opening all 4 barrels. In my years of a former life, I've found COUNTLESS cars in which the throttle simply DID NOT fully open the carb.

On a small engine, or one which is not built for high RPM performance, you probably won't get much opening by just slapping the carb open in neutral.

 

[rumblefish360]

He nailed it. It is a test after test issue. You need to drive it after each tweak. Do like what said above. Check that the throttle cable is not binding, fully opening up all 4bbl.'s of the carb and Fully warmed up.

You may not feel the secondary side opening but there should be a marked difference when it doesn't. When you tighten the spring up, it delay the opening of the secondary choke plate. Tighten until the bog goes away.