Holley Performance Products is proud to announce their new Aluminum Ultra HP™ Carburetors. A total of 30 new features and upgrades have been engineered into the new Aluminum Ultra HP™. Most notable are the all aluminum construction, which makes them 38% lighter, and totally redesigned fuel bowls that increase fuel capacity by 20%. The fuel bowls incorporate ten new features including internal baffling to help control fuel slosh; a fuel trough to direct fuel to the jets; and a fuel shelf that minimizes aeration and promotes more consistent metering.
The metering blocks and base plates are made from 6061T6 Billet Aluminum for improved durability and true gasket sealing. The metering blocks are fully adjustable and boast a total of six upgrades. The base plate received ten new enhancements including a dedicated race-only throttle lever; stainless steel adjustable secondary throttle link for your choice of 1:1 or progressive actuation; knurled (hand adjustable) primary and secondary curb idle screws; as well as dual bolt pattern mounting holes.
The main body steps it up with an integrated idle bypass valve that allows proper throttle plate adjustment when using radical camshafts without drilling holes in the throttle plates. The air bleeds have been moved outward for a smoother transition of airflow into the venturii and contoured hex head squirter screws have been added for streamlined airflow as well.
The Holley Aluminum Ultra HP Carburetors are available in an all-new Hard Core Gray™ hard coat anodized finish with Black™ billet for superior corrosion protection. They’re also available in natural tumble-polished aluminum with your choice of Black™ or Red™ metering blocks and base plate. The Aluminum Ultra HP comes in 600, 650, 750, 850, and True 950 CFM.