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

The first thing i would check if i were you is the fuel to air ratio...I had the same problem with my 1981 camaro Z28. When the secondaries opened it was running way to rich...you could also have a small vaccum leak.

i would check your fuel pressure when it bogs out. I'm pretty confident the problem is your fuel pump/fuel filter.

thanks for the H