IRD Racing K4 Series Custom Carburetors - Engine Builder Magazine

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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.

Engine Builder
By Engine Builder

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.

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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.

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These pistons are forged from 2618T aluminum alloy and machined on dedicated CNC machine cells to tight tolerances. 2618 aluminum has a lower silicon content than other alloys. That makes the pistons stronger and more ductile—perfect for high-load, high-stress applications like superchargers, turbochargers, or nitrous oxide. 

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