The 4180 Holley carb vacuum helps with transmission performance on heavy vehicles. This Holley 4180 carb is a secondary function attached to a transmission.
It has to be hooked to a vacuum port that only has vacuum on it when you give it gas, That is called ported vacuum. If you look at the holly, you will see some small vacuum ports on it, start engine and witch ever one don't suck on your finger then that will be the 1 you hook it to. Then plug the rest if you don't need them for something else.
It depends on the year of the car.....but if you are running HEI ignition (74 and later) it will run to the carb. It goes to a ported vacuum signal. You will find a ported vacuum on a fitting that is above the carb base plate. It should have no vacuum when the engine is idling but will have vacuum when you rev the engine.
Look on the carb for a small vacuum source above the throttle body. You would want one that has no vacuum at idle.
vacuum lines,there are three one for each petcock and one for the vacuum advance, the two for the petcocks go to the carb boots, one on each side,and the one for the vacuum advance goes directly to the no. two carb.
1993 on Toyota corolla vacuum hose
your needle and seat are bad, it can be changed with out removal of the carb.
In general, yes. But it might be necessary to change jets, power valves, metering rods, or vacuum springs depending on the type of carb being used. There are books available through Amazon and others that describe in detail how to fine tune your brand of carb.
When you get ready to run the vacuum line from the turbo 400 trans modulator to an Edlebrock Performer 800 CFM carb, attach the vacuum line for the transmission vacuum modulator to the bottom constant vacuum source or the plug that is below the throttle plate. After that, install the vacuum advance to the port that is signaled or right above the throttle plate. Once that is completed, install the large vacuum line to the back of the carb for the power brake.
yes at the carb
There should be two small and one large vacuum connection points on the front of the carb, hook it to one of the small ones, that will be for your vacuum advance. the big one is for crankcase ventilation. one of the smaller ports is manifold vacuum, the other is timed vacuum. they are not the same, but you will use one of these, usually the "timed" port.
My Preference would be a 600 Edlebrock, but for those who like Holly's a 650 with vacuum secondaries would be good too. -Josh
A vacuum gauge is all you need to tune in a carb. A gauge for each carb if you have more than one.