ATM Innovation’s XRX Race Series is the ultimate 4700/4500-flange methanol carb available in 3 sizes from 1050cfm to 1250cfm, enough to feed the most robust big-blocks. A QFT™ die cast aluminum carb body is fitted with annular discharge boosters and ATM 4-circuit, 5-emulsion, 4-corner idle billet metering blocks. The throttle shafts have been slabbed for unrestricted flow. And ATM's™ all aluminum dual inlet fuel bowls with dual sight glass windows are fitted with 7/8”-20 AN #8 fittings for securing fuel lines. Methanol XRXs have a gold corrosion-resistant coating with black anodized billet blocks. They also have special gaskets and GFL diaphragms resistant to methanol fuel.
When it comes to large 4700/4500-flange carburetors it’s hard to beat ATM Innovation’s XRX Race Series. You get a true custom built carb that is engine tested and ready-to-race right out of the box. And with the help of ATM’s Custom Shop technicians you can get your XRXs configured for anything from throttle stop racing to all-out 2 x 4 setups.
ATM starts with a QFT™ die cast main body and adds its own ATM billet 4-circuit, 5-emulsion metering blocks with 4-corner idle adjustment. It adds annular booster assemblies with custom sizes from .092”-1.05” depending upon the carb size and the application. Of course the XRX has changeable idle and high-speed air bleeds and changeable idle, emulsion, intermediate and discharge channel feed restrictions. With 3 sizes available from 1050cfm to 1250cfm, the XRX has advanced inlet contours and slabbed throttle shafts with external linkage that enhances flow velocity.
The final piece of the XRX puzzle is the ATM's™ all aluminum dual inlet; dual sight glass windows fuel bowls that control fuel flow regardless of the G-forces. They have the desirable 7/8”-20 AN #8 connections that make plumbing your fuel system failsafe.
XRX Series carbs are available for gas, methanol and E85. Methanol XRXs have a gold corrosion-resistant coating with black anodized billet blocks and billet throttle bodies. They also have special gaskets and GFL diaphragms resistant to methanol fuel.
Part #: XRXA