The 4150 Series Billet Enforcer Alcohol Carburetor by Advanced Product Design is one of drag racing's newest and most popular carburetors.
This carburetor features a custom CNC’d machined booster and billet main body design for maximum air flow and strong booster signal.
CNC machined billet metering blocks allow for precise metering, a uniform fuel curve and superior adjustability with both 2 and 3 circuit systems available.
A billet base plate, also CNC machined in house at APD offers superior strength and smooth throttle response, while a 4 Corner idle systems offer consistent fuel control at idle.
Secondary idle speed adjustments allow for fine tuning of the secondary throttle position.
Adjustable air bleeds.
Large head idle mixture screws.
Custom hard coating anodized finish.
Notes: All APD Carburetors include jet extensions and a notched rear float along with Stainless Steel .150 needle & seats for alcohol. For the racer that is looking for the ultimate carburetor package, APD offers a foam free billet float bowl as an option.
The BILLET ENFORCER starts from a custom extruded piece of 6061-T6 billet aluminum and is produced on a 4-axis machining center.
The advantage to these being CNC machined from billet is it allows us to make whatever changes necessary without having to work around casting limitations.
The raised boosters, also machined from 6061-T6 aluminum, allow a better passage of fuel around the entire diameter of the booster. Along with raising the exit point of the fuel in the booster, this helps stop fuel slosh out of the booster on launch and when going on the throttle stop.
The billet also adds strength eliminating warped or broken main bodies.
Being machined from billet, this adds strength eliminating warped or broken main bodies. The fully CNC’d machined main body is also hard anodized after machining to eliminate any corrosion problems and makes for a great looking carburetor for years to come.
The throttle shaft bushings are made from oil impregnated bronze to make for smooth throttle transition and eliminating throttle sticking off idle.
Externally adjustable linkage is Teflon coated along with 304 stainless steel hardware making it strong and corrosion free. These features along with our billet metering blocks, Teflon coated large window sight glass bowls, screw on jet extensions and a notched float makes this what I believe to be the best value the carburetor industry has seen.