What size Holley carb do I need?
Does Carb size matter?
| Carb Size | Manifold Vac | Actual CFM |
|---|---|---|
| Holley 650 | 1.8 | 600 |
| Holley 750 | 1.5 | 606 |
| Holley 850 | 0.5 | 615 |
| Holley 950 | 0.4 | 618 |
How much cfm carb do I need?
The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456. Any ordinary stock engine will have a volumetric efficiency of about 80%.
What kind of carburetor does a 0-6210 Holley use?
650 CFM Spreadbore Carburetor Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. The 0-6210 is a Model 4165™ Spread Bore designed to fit several applications. See application chart below in tech resources for specific details.
What is the difference between a 350 and 650 carburetor?
A 650 carb on a 358 cubic inch engine will seldom see 1.5 inches but a 350 carb on the same engine will frequently see 5 to 8 inches. At 7 inches of vacuum the 350 carb is really flowing about 430-440 cfm. The main characteristic of these carbs is the tendency to run excessively rich at high rpm.
How much vacuum does a 650 CARB have?
Now is a good time to understand carb flow ratings. 2 barrel carbs are rated at 3 inches of vacuum and 4 bbl carbs are rated at 1.5 inches. A 650 carb on a 358 cubic inch engine will seldom see 1.5 inches but a 350 carb on the same engine will frequently see 5 to 8 inches.
Is there a kickdown lever for a Holley 4175 carburetor?
Transmission Kickdown lever for Model 4165/4175 Holley carburetors. This part is legal for sale and use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it is a direct or consolidated replacement part. This carburetor has a spreadbore flange.
