IF YOU EVER WANTED THE ESSENTIAL FEATURES OF A TOP-OF-THE-LINE HOLLEY GEN 3 ULTRA CARBURETOR BUT WERE HESITANT TO SPEND ADDITIONAL MONEY FOR HIGHEND EXTRAS YOU MIGHT NOT USE, HOLLEY HAS THE CARBURETOR FOR YOU: THE DOMINATOR SP.
Available in a three-circuit 1,150cfm design and two 1,050-cfm configurations—two circuit and three circuit—Dominator SPs give you the best aspects of the stateof-the-art Gen 3 Ultra carburetor in a budget-friendly version that's perfect for street/strip applications and even some all-out bracket cars.
These innovative new carburetors, introduced late in 2016, are 28% lighter than traditional Dominators yet cost more than 40% less than a new Gen 3 Ultra. “It’s a huge savings,” said Holley Senior Design Engineer Laura Shehan. “This carburetor series is for the guys out there that may not take advantage of the premium features offered by the Gen 3 Ultra, such as the idle bypass system and high capacity fuel bowls, but want the performance gains that the Gen 3 offers. That’s exactly why we came up with the Dominator SP.”
For a significantly lower price, Holley Dominator SP carburetors offer the same patent-pending main body as the Gen 3 Ultra, which is 5⁄16-inch taller than Holley’s previous generation. The added height creates larger radius air entries for smoother airflow, greater consistency and improved throttle response. “The Gen 3 lineup is calibrated for today’s engines, today’s fuel,” Shehan said. “So is the Dominator SP. Functionally, they’re the same; the Dominator SP is just stripped down a little to be more budget friendly.”
The Dominator SP incorporates an extended air-cleaner flange for easy air-scoop installation with an available air-scoop adapter. It features all-aluminum construction, tunable billet metering blocks, throttle-positionsensor mounting points and handadjustable knurled curb-idle screws. Each calibration has been dyno- and track-tested for proven performance; like every Holley carburetor, Dominator SPs are wetflow tested before they ever go out the door. “It’s not going to leak; it’s not going to fail; it’s going to be exactly what you expect when it comes out of the box,” Shehan said.
Each one is fully CNC-machined, from the venturi throat to the throttle bore, for consistent, predictable, repeatable performance. “Dominator SPs have the same billet metering block as the Gen 3 Ultra, but instead of screw-in emulsions, they have drilled-in emulsions,” Shehan said. “It’s still a billet metering block, which is the brain of the carburetor, the same as Gen 3 Ultra. If you’re not a super high-end racer, racing a lot and running your engine on the dyno all the time, you probably shouldn’t touch the emulsions stack anyway. You can get in trouble if you don't know exactly what you’re doing.”
Instead of an adjustable secondary throttle linkage like the Gen 3 Ultra, the Dominator SP comes from the factory with a progressive external linkage already installed, and you get a one-to-one linkage in the included kit.
“The Gen 3 Ultra is ‘premium premium,’ the best of the best,” Shehan said. “We worked with race engine builders on the dyno and at the racetrack to make it the best high-end carburetor on the market. Dominator SPs are for the racer who has the ability to tune his carburetor but doesn’t want to mess with it every day: the budget-conscious guy, the street/strip Saturday night racer who likes making a few jet changes based on the weather. You can take your car out a couple times a month, maybe change jets a few times, but before long you’ll probably just leave it alone because it’s already set up perfectly with the same proven calibration as Gen 3 Ultra carburetors.”
/ Holley SP carburetors are 28% lighter than traditional Dominators but don’t cost much more than half what a state-of-the-art Gen 3 Ultra carburetors does.
/ An incredible amount of thought has gone into every aspect of the new SP carburetor right down to the knurled curb-idle screws that make it so easy to adjust by hand.
/ Three variations are available: a threecircuit, 1,150-cfm design and two 1,050-cfm configurations, a two circuit and a three circuit.