# Question: What Carburetor Mild 350?

## What carburetor do I need for a 350?

A 600-cfm carburetor may perform quite well on a stock 350 Chevy. However, the minute you start weaving in power adders like a hotter cam, a dual-plane performance intake manifold, and aluminum heads you’re going to need 700-750 cfm.

## What’s the best intake and carb for 350 Chevy?

Top Intake Manifold for Chevy 350

1. Edelbrock 2701 Performer Intake Manifold.
2. Edelbrock 2116 Performer Vortec Aluminum Intake Manifold.
3. Edelbrock 7501 Performer RPM Air-Gap Intake Manifold.
4. Dart 42811000 Dual Plane Intake Manifold.
5. Weiand 8121 Intake Manifold.
6. Edelbrock 2101 Performer Intake Manifold.

## What cfm carburetor do I need?

The formula for calculating how much CFM (cubic feet per minute) an engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456. Any ordinary stock engine will have a volumetric efficiency of about 80%. Even with about a 10% cushion, a 500 CFM carburetor will handle this engine great.

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## How do I choose the right carburetor?

To arrive at the most appropriate carburetor choice, there’s a basic formula: engine displacement multiplied by maximum rpm divided by 3,456. For example: a typical 355ci small-block—a 0.030-over rebuild—with a 6,000-rpm max engine speed would work well with a 616-cfm carb ((355 x 6,000) 3,456 = 616.32).

## What happens if your carburetor is too big?

If the barrels are too big, the loss of air velocity means the cylinder will not fill to its full capacity. An engine with a carb that is too big will put out less Torque and Horsepower. It will be difficult to drive due to poor low-end torque. If you drag race your car, an oversized carb will produce slow 60 ft.

## How much horsepower will a 750 cfm carb support?

A 750DP on a 330hp-400hp 5.7 with a dual plane intake (performer rpm) is easy to tune and will make max power to boot.

## How much horsepower does a high rise intake add?

One might expect the intake that had the highest average flow was best. In this instance, it was the second intake from the top. However, it showed a minimal gain in top end ( about 3 hp ) while costing twice that much in the 3,000- to 4,500- rpm range, which is used so much more often.

## Do aftermarket intake manifolds increase horsepower?

Adding an aftermarket performance intake manifold with taller, larger and/or longer runners feeds the engine more air and fuel to increase the torque and horsepower output.

## What is an air-gap intake?

The air-gap design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power.

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## How do I know if my carburetor is rich or lean?

Q: How Do You Tell if a Carburetor Is Rich or Lean? A: One way to tell for sure is by “reading” the spark plugs. If the plug tip is white, the mixture is lean. If it’s brown or black, it’s rich.

## How much horsepower will a 650 cfm carb support?

So, using your Google-Fu you type “How much power can a 650 cfm carb support?” Well, chances are that you’ll get answers in the 450-470 hp range, but that’s not really the right way to look at it.

## Does a carburetor add horsepower?

After you fix what’s limiting performance, an Edelbrock Performer intake can add as much as 10 HP. The FAQ forum is a good place to ask questions. There are differences between engines and performance improvements.

## How do I know what size carburetor to buy?

Carburetor Sizing Carbs are sized by cubic feet per minute (cfm). Larger engines that operate at higher rpm need more air and fuel. It is important to match the carburetor’s cfm rating to the needs of your engine. Follow this link to learn more about Carburetor CFM Rating.

## Which carburetor do I have?

The list number is stamped on your carburetor, either on the corner of the airhorn or choke tower or, if it doesn’t have an airhorn, on the mainbody. Remove the carburetor from your vehicle before looking for the list number to easily find the information you need.

## What can I spray in my carburetor to start my engine?

Remove the air filter and shoot a one-second burst of an aerosol petroleum-based lubricant (not starting fluid, silicone or Teflon spray) directly into the carburetor throat. Try starting. If the engine starts and then dies, that confirms you’ve got a fuel problem.