COMPETITION CARBURETORS GEN 3 MODEL 4500 ULTRA DOMINATOR SERIES Installation and Adjustment Instructions P/N 199R10652-1 CONGRATULATIONS on your

10 Power Valve Channel Restrictions (PVCR): These two restrictions are visible when the power valve is removed. They meter the flow of additional f

11 pressure across the idle air bleeds, pushing more fuel from the idle well creating a richer fuel/air ratio. The idle mixture screw is the only ad

12 IFR IntFR (if applicable) PVCR POWER VALVE EMULSION BLEEDS: BLEED 1 BLEED 2 BLEED 3 BLEED 4 BLEED 5 JET IAB

2 REMOVAL OF OLD CARBURETOR: WARNING! Prior to and after installing your new carburetor, manually operate the throttle lever, checking for any sti

3 INSTALLATION OF NEW CARBURETOR: WARNING! Holley Performance Products highly recommends that a quality fuel filter be installed with any replaceme

4 Figure 1 Figure 1a 3. If you do need to adjust this, loosen the lock screw and turn the adjusting nut clockwise to lower the fuel level and co

5 IDLE BYPASS VALVE: Fully Open Mid

6 Figure 2 Figure 3

7 ACCELERATOR PUMP: The accelerator pump’s purpose is to make up for the lag in fuel delivery. This enables the engine speed to increase in resp on

8 NOTE: If a nozzle size is desired that seems “in between” the nozzle sizes provided, then the nozzle can be drilled to the desired size by using

9 3. Carburetors are calibrated at 70° at sea level. Decrease the jet size one number (approx. .002”) for approximately every 2000 ft. increase in