Connecting PCV for the first time…is this nub at the back my carb where I’m supposed to connect it?
- Thread starter tonyp25
- Start date
-
Uncle Bob
Shiny paint causes stress.
You should connect it to the spot that has a hose with a bolt in it. That goes into the carb spacer so there is no nonsense going on with it.
Where does the brake booster plug in? Don't put the PCV on the same connection as that and don't put either of those on a runner directed to a single intake port.
Where does the brake booster plug in? Don't put the PCV on the same connection as that and don't put either of those on a runner directed to a single intake port.
Thank you! So I don’t see the brake booster tying into the carb at all. It looks like the setup has an electric vacuum pump for supplying vacuum to a power brake booster.
Should there also be a hose connecting to the carb for the booster?
My vote is to take out the hose and bolt. It will look more sanitary with the cap on the other vacuum source.
MadScientistMat
Well-Known Member
- Joined
- Mar 6, 2008
- Messages
- 686
- Reaction score
- 293
Usually the brake booster hose is on the manifold rather than on the carb itself.
If you have a vacuum pump you don't need to hook the booster to the intake.
Uncle Bob
Shiny paint causes stress.
No, leave that like it is
So both valve covers had breathers. When I’d drive the car those breathers would smoke a little after the engine heated up and without fail leave the tiniest coating of oil on everything. The engine has less than a few hundred miles on its So it was suggested to me to added PCV to the passenger side valve cover and hook it up. I bought the below one from spectre so we’ll see how it does:
66Vcuda
Member
IMO, one valve cover should have a straight breather connected to the air cleaner and the other PCV connected to the carb base(blocking bolt). Clean air goes in one side of the engine and the PCV evacuates air/fuel/oil mixture out into the carb base to be mixed with the air/fuel mixture there to be burned cleanly.
I like the air pump for the booster. It keeps the air/fuel mixture out of the booster and relies on a constant 12V instead of engine vacuum.
The main reason for using an electric vacuum generator is that engine vacuum is too low to operate the booster. Does the engine have a sizeable cam?
You should hook up the PCV & see if it works. The carb jetting etc is designed to get about 3 cfm of airflow [ at idle ] from the PCV. If it does not get that 3 cfm, t/blades [ or some other means ] will need to be open further at idle, upsetting the T-slot/idle relationship.
To test PCV: connect to carb port, engine idling, remove PCV. Pintle should be pulled IN, not moving. Moving/rattling means insufficient vacuum to operate the PCV. You can buy an expensive adjustable PCV orrrrrrrrrrr get a 3/8" bolt shank, & cut off about 1/2" or less; drill a 1/8" hole through it. Push shank into PCV hose.
You should hook up the PCV & see if it works. The carb jetting etc is designed to get about 3 cfm of airflow [ at idle ] from the PCV. If it does not get that 3 cfm, t/blades [ or some other means ] will need to be open further at idle, upsetting the T-slot/idle relationship.
To test PCV: connect to carb port, engine idling, remove PCV. Pintle should be pulled IN, not moving. Moving/rattling means insufficient vacuum to operate the PCV. You can buy an expensive adjustable PCV orrrrrrrrrrr get a 3/8" bolt shank, & cut off about 1/2" or less; drill a 1/8" hole through it. Push shank into PCV hose.
Why does the carburetor have a spacer when it will bolt directly to the intake manifold? The correct location for the PCV is the large port on the carburetor. The power brake booster attaches at the intake manifold conventionally. I could only imagine like Bewy said the engine might have a large camshaft that doesn't produce adequate vacuum for power brakes.
So I have a breather with a nipple on it that I could use on the other valve cover but I’m not seeing a spot to hook it up to the air cleaner. Is that something I’ll need to make myself?
I wouldn't worry about that. (unless New York requires it) You have a breather on one cover and the pcv hooked to the base of the carb on the other cover. That should be all you need.
-
