Page 356 - 2020-2021 Racecar Engineering Drag Racing Parts and Accessories Catalog

2020 DRAG RACING

Single-Stage Power Valves Titanium Needle And Seat
Available in standard and high flow, gasket included. HLY6-521
Part No. Description Part No. Description Large .150" titanium seat is among the largest avail-
Standard Flow High Flow able anywhere. Very responsive to changes in flow
HLY125-25 2.5" Hg. HLY125-125 2.5" Hg. rates, it has superior sealing qualities and is recommended for racing only.
HLY125-35 3.5" Hg. HLY125-135 3.5" Hg.
HLY125-45 4.5" Hg. HLY125-145 4.5" Hg.
HLY125-50 5.0" Hg. HLY125-155 5.5" Hg. Adjustable Needle And Seat Hardware Kit
HLY125-55 5.5" Hg. HLY125-165 6.5" Hg.
HLY125-65 6.5" Hg. HLY125-185 8.5" Hg. HLY34-7
HLY125-75 7.5" Hg. HLY125-1005 10.5" Hg. Includes adjusting nut, locking screw, gaskets, and
HLY125-85 8.5" Hg. O-rings.
HLY125-95 9.5" Hg.
HLY125-105 10.5" Hg.
Floats
Power Valve Check Valve Kit Replacement floats are available in nitrophyl or
HLY125-500
brass. Notched floats for use with jet extensions
Power valve “blow-out” pro tec tion are also available.
can now be added to older model Part No. Description
2300, 4150, and 4160 carbs. Kit includes a HLY116-1 Nitrophyl Side Hung Float, Adjustable
spring, brass seat, check ball, and instructions. HLY116-2 Brass Center Hung Float
HLY116-3 Nitrophyl Center Hung Float
HLY116-4 Brass Side Hung Float
Power Valve Plug HLY116-10 Notched Float With Two Main Jet Extensions
HLY26-36 HLY116-11 Notched Float Without Main Jet Extensions
HLY216-43 Nitrophyl Side Hung Float, Non-Adjustable
Plug blocks the power valve circuit. An increase of 6 to 8 jet sizes is recom-
mended to compensate for the loss of enrichment. Float Hanger Hardware Kit
HLY20-105
Vacuum Gauge Hardware for float installation.
HLY26-501
A great tuning aid. Chrome-plated, 2" diameter vacuum gauge Fuel Bowl Vent Baffle
reads 0-30 in. HG and includes a male 1/8"NPT fitting. HLY26-89
Baffle is 1-7/16" long, and prevents fuel from
Heat Shield splashing out of the vent tube.
HLY108-70
Aluminum shield is used to insulate the carburetor from Accelerator Pump Discharge Nozzles
the intake manifold to provide improved performance Each nozzle includes two gaskets. Used on 4150, 4160, 4165, 4175, and
through improved air/fuel density. Fits all square flange 4500 series carburetors. Straight-type and Tube-type nozzles were origi-
Holley carbs. Complete with gaskets. nally used on models 4150, 4160, and 4500. Anti-Pullover style nozzles,
originally used on production 4165 and 4175 models, were engineered
“Viton” Inlet Needles And Seats to combat “pump pull-over”, which occurs when the flow of air over the
Part No. Description Part No. Description nozzles pulls fuel from the nozzle.
Adjustable Non-Adjustable Straight Type Tube Type Anti-Pullover
HLY6-506 0.097" Seat Size HLY6-511 0.078" Seat Size Hole Size Part No. Part No. Part No.
HLY6-508* 0.097" Seat Size HLY6-513 0.097" Seat Size (Off-Road) .018" HLY121-118 — —
HLY6-504 0.110" Seat Size HLY6-510 0.110" Seat Size
HLY6-518-2 0.120" Seat Size .021" HLY121-121 — — Straight Type
*Premium design. .025" HLY121-125 HLY121-25 HLY121-225
.028" HLY121-128 HLY121-28 HLY121-228
.031" HLY121-131 HLY121-31 HLY121-231 Tube
“Steel” Inlet Needles And Seats Type
For High Performance Fuels .032" HLY121-132 — — Anti-Pullover
.035" HLY121-135 HLY121-35 — Type
For use with alcohol or additives (benzine or acetone). .037" HLY121-137 HLY121-37 HLY121-237
Part No. Description .040" HLY121-140 HLY121-40 HLY121-240
HLY6-501-2 0.097" Seat Size .042" HLY121-142 HLY121-42 —
HLY6-500-2 0.110" Seat Size
HLY6-502-2 0.120" Seat Size .045" HLY121-145 HLY121-45 —
HLY6-515-2 0.130" Seat Size .047" HLY121-147 — —
HLY6-519-2 0.150" Seat Size .050" HLY121-150 — —

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