Page 253 - VSI Master Catalog

2-BBL COMPETITION CARBURETORS
MODEL 2300 HP
• Intended for short circle track racing sizes of throttle bore, venturi, booster diameter,
throttle plate thickness and throttle shaft diameter have not changed.
• They comply and are fully consistent with the technical gauging now in use.
• Venturi casting rings are reamed to legal dimensions, for more consistent air flow.
Part # CFM Barrel Flange
HOL0-80583-1 500 2-BBL Holley 2-BBL
CARBURETOR HARDWARE
ACCELERATOR PUMP HARDWARE
4500 Dominator Accelerator Pump Cams
Choke
None
Finish Model
Dichromate 2300HP
ACCELERATOR PUMP CONVERSION KIT, 50CC Models 2300, 4150 and 4160
• Instantaneous response!
• The Holley 50cc accelerator pump will substantially increase fuel capacity over the standard
30cc pump system.
HOL0-80787-1
350
2-BBL
Holley 2-BBL
None
Dichromate
2300
HOL20-80 HOL20-81
“White” Pump Cam. Profile design gives a quick, early shot of fuel but it does not empty the pump. “Yellow” Pump Cam. Profile design delivers an early fuel shot and continues until pump empties.
ACCELERATOR PUMP CAM ASSORTMENT KIT
• Each cam has a different shape or
• Eliminates flat spots off idle or at any other RPM range. • This kit includes everything required for easy installation
profile to give different results.
including new pump housing, stud, arm, diaphragm, spring and longer pump housing screws.
HOL20-12
Accelerator Pump Cam Assortment Kit
HOL20-11 Accelerator Pump Conversion Kit - 50cc
Accelerator Pump
ACCELERATOR PUMP TUNING KIT
HOL26-23
HOL26-38
Pump Arm
HOL20-78
Pump Cover - Chrome
• Contains a selection of accelerator pump hardware components including pump diaphragms, pump nozzles, pump cams and
HOL34-504 HOL34-505 HOL26-41
30cc pump
50cc pump
“Umbrella” Check Valve
Transfer Tube Transfer Tube O-Ring
Models 2300, 4150, 4160 (Plastic)
related parts.
• For Holley 2-bbl and 4-bbl
performance carburetors.
HOL36-184 Accelerator Pump Tuning Kit
ACCELERATOR PUMP DISCHARGE NOZZLES
• The nozzle hole size determines the rate of fuel discharge. • A larger hole will “shoot” the fuel at a faster rate, and with
less pressure, than a smaller hole. • Sizes are stamped on each nozzle.
Straight Type
(Includes 2 Nozzles & 4 Gaskets) Used on Models 4150, 4160 and 4500
Hole
ANTI-PULLOVER STyLE NOZZLE
• Designed to combat the condition that’s sometimes called “pump pullover”.
Part #
HOL121-225 HOL121-228 HOL121-231
Hole Size
.025" .028" .031"
Part #
HOL121-237 HOL121-240
Hole Size
.037" .040"
Hole Size
.037" .040" .042" .045"
HOL121-118
HOL121-121
HOL121-125
HOL121-128
HOL121-131
HOL121-132
HOL121-135
HOL121-137
HOL121-140*
HOL121-142*
HOL121-145*
HOL121-147*
HOL121-150*
* Includes Hollow Pump Screw
TUBE TyPE NOZZLE
.018" .021" .025" .028" .031" .032" .035" .037" .040" .042" .045" .047" .050"
• Includes 2 nozzles & 4 gaskets.
• Used on Models 4150, 4160 and 4500.
HOL121-25 HOL121-28 HOL121-31 HOL121-35
Hole Size
.025" HOL121-37 .028" HOL121-40 .031" HOL121-42 .035" HOL121-45
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