How many jet sizes does a power valve add?
The ratio of the amount of fuel added by the power valve will change with each version Holley carburetor, but typically the power valve circuit will add anywhere from five to eight jet sizes-worth of additional fuel.
What sizes do Holley power valves come in?
The range for standard Holley valves is from 2.5 to 10.5 “Hg (inches of Mercury)….
- Cruise: 14.7:1 – 15.5:1.
- Idle: 13.5 – 15.0.
- Stoich: 14.7:1.
- Wide-open throttle: 11.5:1 – 13.3:1.
Why do flames come out of my carburetor?
These mainly occur through a process called back-firing, where the carburetor is feeding too lean or too rich an air-fuel mixture to the combustion cylinders or where the carburetor “timing is too advanced.” This is to say that where the carburetor timing is such that there isn’t enough time for complete combustion of …
How to tune your Holley carburetor?
How To Tune Holley Carburetors. How to tell what size carb you need: You take the engine cubic inch and multiply by the maximum RPM and divide by 3456. If you have an automatic transmission you will need a vacuum sec. carb, a standard transmission can use a Double Pumper carb.
How to build and power tune Holley carburetors?
How to Build and Power Tune Holley Carburetors is the complete guide to choosing and specifying Holley Carburetors for engines for road and track performance. This book covers both 2-barrel 2300 and 4-barrel 4150 & 4160 carburetors, and can also be applied to 4180 & 4190 emission control carbs.
How to hook up a Holley carburetor?
Use the retaining screw from the original carburetor to fasten the lever on the shaft. 6. Remove the timed spark hose from the vehicle and install the hose on the carburetor. The spark hose must be installed before mounting the choke housing. 7. Using the three-(3) long screws provided in the kit, insert the screws in the new choke housing.
How to rebuild a Holley 4412 carb?
Free Shipping to your doorstep! You don’t have to drive several hours to pick up your motor.