Adjusting Holley & Demon Mixture Screws

Adjusting Holley & Demon Mixture Screws

Adjusting Holley & Demon mixture screws. The first step is to set the curb idle speed to between 750 and 850 RPM, then check ignition timing and adjust if necessary. Now we are ready to set the mixture screws (Holley part # CS1540, Demon Part CS1540KH). Your...
Holley Specs HP Series

Holley Specs HP Series

Holley 4150 hp carburetors have NO choke tower. The main body has a radiused air entry instead. The carburetor identification number on the HP series are stamped into the THROTTLE SIDE of the main body. Holley Carburetor Specs 4150 HP Series Here we have gathered all...
Edelbrock Carburetor Specs

Edelbrock Carburetor Specs

Allstate Carburetor has been providing tuning information about Edelbrock carburetor specs since Edelbrock started making them. ACFI is happy to provide the specs many of you have asked for, all compiled into 1 place. All of the parts listed below are available on our...
Holley Double Pumper 4150 Specs

Holley Double Pumper 4150 Specs

Allstate Carburetor is providing the Holley Double Pumper 4150 Specs. ACFI is happy to provide the specs many of you have asked for all compiled into 1 place. All of the parts listed below are available on our website. To locate and identify your Holley carburetor the...
Carter Competition Series AFB Specs

Carter Competition Series AFB Specs

Once again Allstate Carburetor is providing what has been lost or left behind in the information world of Carter Competition Series AFB Specs. ACFI is happy to provide the specs many of you have asked for all compiled into 1 place. All of the parts listed below are...
Holley Float level

Holley Float level

Holley Float level. In order for proper fuel deliver there must be a proper fuel level in the carburetor fuel bowl. Whether it is a 1, 2 or 4bbl carburetor. If the holley float level is too low there will be a lag in take off or lack of power as the RPM increases....

Vacuum Leaks

Vacuum Leaks. The best car technicians and inexperienced carburetor tinkerers have used this verbiage “internal Vacuum Leaks” in the carburetor to explain what they could not find or explain. To set the record straight…CARBURETORS DO NOT HAVE...
Proper Carb Size Selection

Proper Carb Size Selection

Proper Carb Size Selection. The most common mistake in carburetor selection is misapplication. First and foremost you must be realistic in what the capabilities of your engine and drive train are. Then, how will the vehicle be used? On the track or on the street? We...
Blocking Off a Power Valve

Blocking Off a Power Valve

Many questions arise when Blocking Off a Power Valve. Power valves are used for off idle /transition enrichment. They are an efficient way to enrich a motor when it needs it without having to over jet it. If you are running a high performance motor that goes from idle...
Camshaft Changes and Rough Idle

Camshaft Changes and Rough Idle

When changing camshafts in an engine you have also changed the engines air fuel needs. At all throttle and rpm points but most noticeably at idle. HEre we will shed some light on Camshaft Changes and Rough Idle. Due to the higher lift and longer duration of your new...