IRD Racing K4 Series Custom Carburetors - Engine Builder Magazine

IRD Racing K4 Series Custom Carburetors

From Mega Trucks, Super Cat Class Poker Run boats, to all out drag racing, this carburetor can handle whatever is thrown at it.

K4 series custom carburetors are designed with the nitrous/naturally aspirated racer in mind. From Mega Trucks, Super Cat Class Poker Run boats, to all out drag racing, this carburetor can handle whatever is thrown at it.

Made with a billet aluminum center section and custom calibrated for your racing application. Features include Billet construction for IRD’s 4150 and 4500 designs, custom boosters per application and more.

Features:

*Billet construction for 4150 and 4500 designs
*Custom boosters per application
*IRD Billet base plate for our 4150 designs
*Adjustable throttle linkage 4150/4500
*Cast aluminum fuel bowls with big sight windows
*Teflon bushing inserts for better throttle shaft sealing
*IRD K4 billet metering blocks (2 or 3 circuit design per application)
*Adjustable air bleeds
*High flow needle and seat custom to your specs\
*Compatible with gas applications

Rated R carburetor is recommended for E85 and alcohol combinations and saltwater boat applications due to it’s corrosion resistant coating.

You May Also Like

Stef’s Performance Products’ 3-Gallon Truck Pull Dry Sump Tank

Stef’s Performance Products’ 3-gallon truck pull aluminum dry sump tank features a 9″ diameter, 19″ overall height, a two-piece design.

dry sump tank

Stef’s Performance Products' 3-gallon truck pull aluminum dry sump tank features a 9" diameter, 19" overall height, a two-piece design for easy cleaning, and the lower fitting is clockable in 45-degree increments. Part #4120 T also comes with a -16an inlet, -12an or -16an supply, 4" billet filler cap, and o-ringed sealed filler neck.

AMSOIL 5W-40 Synthetic Metric Motorcycle Oil

AMSOIL 5W-40 synthetic metric motorcycle oil is designed to excel in all areas unique to metric motorcycles, including high engine rpm, wet-clutch lubrication and extreme-pressure regions of gears.

AMSOIL motorcycle oil
Jomar 3-Piece Adjustable Pushrod Guide Plate Kits

Jomar’s kits are available for 5/16” or 3/8” pushrods, and for small block Ford and Chevrolet.

Jomar
JMS Daytona CD-1 Full Race Ignition System

This system optimizes the potential of distributor and crank trigger-based ignition systems on all 4, 6 and 8-cylinder engines.

Ignition
Fluidampr Toyota 2JZ Damper

Upgrading to a Fluidampr performance damper when engine mods are done further ensures long-term durability and optimum power.

Fluidampr Toyota 2JZ damper

Other Posts

Turbocharged 414 cid L8T Engine in a Honda S2000

As we’ve mentioned in other Sick Week interviews, there aren’t tons of import cars at the annual drag-and-drive event in Florida, so when we see something like RC Flint’s Honda S2000, we take notice. Upon further investigation, RC opted to forgo the 4-cylinder for a 414 cid L8T engine, and we got the full scoop

L8T engine
Wagler CX Billet 6.7L Cummins Engine

The Cummins engine is a powerhouse in the diesel world, but even the mighty Cummins can be improved upon. And who better to do it than Jeremy Wagler and Wagler Competition Products. The shop’s new Wagler CX billet engine is based on the 6.7L, but utilizes some different attributes for big power and performance.

Wagler CX billet Cummins engine
Honda S2000 Sports a Turbocharged L8T Engine

Following a fire with his Honda S2000 in December 2023, RC Flint spent five weeks in a mad dash to get his turbocharged L8T engine and the car back together in time for Sick Week 2024. Even with the setback, the S2000 had lofty goals. Check it out!

Honda S2000 L8T engine
Dodge 2500 with a Turbocharged 6.7L Cummins Engine

Tim Krueger’s current pride and joy is a 2004 Dodge 2500, a truck with a turbocharged and nitrous-boosted 6.7L Cummins engine that has been fine-tuned at Tim’s shop, TK Truck Performance. Check it out!

6.7L Cummins engine