Alex, I do not understand "I think when engine is working (car stay) acceleration is not effective".
Yes, you must prevent the fuel from getting hot in the fuel lines from the tank to the carburetor. When it gets hot, it creates what is called "vapor lock", which prevents fuel from flowing from the tank to the carburetor. Install insulation around the fuel lines from tank to carburetor to prevent this from happening, and particularly at any point of a heat source that is close to the line(s), such as exhaust pipe(s), exhaust headers, etc. Use a fuel pressure regulator to reduce fuel pressure to maximum 5 psi at the fuel bowl entry. More pressure than that will overpower the needle and seat in the bowl and allow the fuel pump to blow raw fuel into the intake manifold, creating a tuning nightmare that you will never be able to fix until you lower the pressure. Edelbrock carburetors are very sensitive to fuel pressure.
I'm trying to figure out where all the lines are going from and to on the front of the carburetor. An Edelbrock has 4 ports on it, one on the rear that is manifold vacuum that goes to the power brake booster. If the brake booster is operated by a line that connects directly to the intake manifold, then the rear outlet is plugged. Then there is a large intake manifold port in the center of the front that connects to a PCV valve in the valve cover. I don't see a PCV fitting on your aftermarket valve covers, so is there a PCV valve somewhere else in the system? It looks like the hose from the center port on the carburetor goes up to the bonnet at the air horn of the carburetor. Does it just connect there and is pulling in free air from the bonnet? If so, that's the same as just leaving the port open on the carburetor and creating a huge vacuum leak.
If there is no PCV at all, then you must provide another way for crankcase pressure to be relieved, otherwise if the motor is sealed up well, it will blow the oil dipstick out of its tube and begin breathing through the tube and creating quite a mess. Either that, or it will blow out a gasket and begin blowing oil all over the engine bay.
The small port on the left would be ported vacuum, normally connected to the distributor vacuum pod on a high-performance motor with an aftermarket cam.
The small port on the right would be manifold vacuum, normally connected to the automatic transmission modulator valve. ea
Please re-visit these lines and where they are supposed to go.
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