i have holley 650 my back barrels are not opening up do i need to buy another or can i fix it? and is thst the reason why my car was bogging out at 3000rpms

 

well i've been alot of holly parts you could rebiuld and get it to run well again there are plenty of carb parts out there.

 

could that be the reason that at 3000rpms it bogged out

 

Vacuum secondaries, right? How do you know they aren't opening? Does it bog out at 3000 RPMs regardless of throttle position, or only 3000 RPMs at WOT?

 

WELL I HIT THE THROTTLE AND THE FRONT OPEN NOT THE BACK! AND YES AT 3000 RPMS IT BOGS

 

If you are parked in the driveway or garage with the hood open and open the throttle while watching the secondaries, you won't see the secondaries open. They don't open that quickly, because you need to sustain flow through the primaries in order to create enough of a vacuum signal to start opening the secondaries, and sustain it to get them to open completely. Try that with no load on the engine and you're going to be sending rods through the block wall before the secondaries start to open.

A "bog" at 3000 RPMs regardless of throttle opening is not a secondary, or even a carb problem. It's an ignition problem (most likely). Could be other things, though, but still, not a carb problem.