wrong hookup

[cannucky]

I found the vacumme line was hooked up to the lower port{ manifold vacumme } instead of the upper switched port what effect has this been having on my engine ? it is an eidlebrock 600 carburator with an electronic ignition distributor setup

 

[doktor_x]

Attaching vacuum advance to manifold vacuum will pull a bunch of advance during any low-load operation (idling as well as cruising) whereas the timed port will only pull advance during light loads with the throttle open far enough to expose the port (cruising and such).

 

[cannucky]

Attaching vacuum advance to manifold vacuum will pull a bunch of advance during any low-load operation (idling as well as cruising) whereas the timed port will only pull advance during light loads with the throttle open far enough to expose the port (cruising and such).

Okay so what is the proper port to use ? and what negative impact will using the wrong port have ?

 

[1wild&crazyguy]

Okay so what is the proper port to use ? and what negative impact will using the wrong port have ?

He told you, it prematurely increases the timing.

At the same time, who cares right? I mean if you run one of those vac canisters you obviously are concerned with milage, so if your motor will handle a bunch of advance at a given rpm and not ping or go flat on you hp wise then go ahead.

Some people use it this way to trick the initial without fiddling the weights/springs cause you can limit the vac canister with an 11/32 allen to only add like 10* so as soon as it's fired it's at 20* [example]

good luck, drive it both ways and see what it feels like.