600 edelbrock secondary bog.

rabbit929 said
mine comes in even when rolling onto it, between 3/4 throttle and wot.

Sounds like it’s working correctly then.

Tighten the spring beyond recommended (4turns) to the point it doesn’t open hasn’t solved it, believe me, I don’t want to replace it. I’d like it to run right.

Even if the Air door doesn’t open, the secondary butterflies are mechanical and open up allowing air in and down the carb. Which of cause, means it’s running lean.

My primary circuit is tuned perfect but it only runs decent if I disconnect the secondaries all together and just run it as a 2 barrel.

Ops, should have included this in the above quote , my bad....
Between distributor and ignition tuning, the only other carb part to tune/change are the primary squirters with the mandatory pump arm readjustment.