bogging problem

1982 camaro 5.0 the car has a rochester quardrajet, a holley high rise manifold single plane and a cam that is one step up from stock, the car runs good until I open the secondarys then it totally boggs out. I replaced the rochester with a new holley 670 street avenger and its does exactly the same thing, totally boggs out when I open the secondarys can anyone help me with this problem? thanks

Probably the secondary metering rods. Either too much fuel or too little when the secondaries are opened.

I agree with the above. Also, Does the carb have vaccume or manual secondarys? if they are manual they may be opening at too low rpms and flooding the engine

If this problem is happening with both carbs, I would bet you are having a fuel pump problem. Hook up a fuel pressure gauge under the hood and rev it up with your hand and see if it is the problem. You should have at least 3-4 psi at WOT.

Probably the secondary metering rods. Either too much fuel or too little when the secondaries are opened. sorry its not manual its vaccumn

sorry its not manual its vaccumnWell if both carbs are doing the same thing it is your fuel delivery .I would get a better pump.