Page 366 - 2017 Racecar Engineering Circle Track Parts and Accessories Catalog

ACCELERATOR PUMP CAM ALCOHOL JET KIT
ASSORTMENT HLY20-12 HLY36-201
Tailor pump performance to in di vid u al engine Kit includes four each of 24 jet sizes from .132"
re quire ments by se lec ting the prop er cam. to .200". Jets fit only Holley HP series 650, 750
and 950 CFM alcohol carburetors. Packaged in a
plastic carrying case.
HLY20-78
ACCELERATOR PUMP ARMS
Part No. Description
HLY20-78 Models 2300/4150/4160, Plastic MAIN JET REMOVAL TOOL
HLY20-114 30cc Pumps, Metal HLY26-68
HLY20-114 Removes Holley jets without damage.

STANDARD MAIN JETS
Holley Main Jets are threaded for ease of installation. To QUICK CHANGE JET KITS
order, use prefix HLY122- followed by the jet number from Chang e jets quickly and easily without removing
chart. Example: HLY122-40 (has an approximate hole size of the fuel bowls. Kits fit car bu re tors with center hung
.040" diameter). Jets have 1/4"-32 UNF threads. Two per card. fuel bowls. In clude fuel bowl, gaskets, plugs and jet
Jet Hole Jet Hole Jet Hole Jet Hole Jet Hole re mov al tool (tool included with pri ma ry bowls only).
No. Size No. Size No. Size No. Size No. Size Part No. Description
40 .040" 55 .054" 69 .0693" 83 .0975" 98 .124" HLY34-25 Model 4150/4160 Carb, Prim. Fuel Bowl With Single Fuel Inlet
42 .042" 56 .055" 70 .0735" 85 .0985" 99 .126" Model 4150 Carb,
43 .043" 57 .056" 71 .075" 86 .100" 100 .1285" HLY34-26 Sec. Fuel Bowl With Single Fuel Inlet And Accel Pump
44 .044" 58 .057" 72 .0755" 87 .1015" 101 .126"
45 .045" 59 .058" 73 .079" 88 .1025" 102 .128" DOUBLE PUMPER
46 .046" 60 .060" 74 .080" 89 .1045" 103 .130" TUNING/CALIBRATION KIT
47 .047" 61 .060" 75 .082" 90 .1055" 104 .134"
48 .048" 62 .061" 76 .084" 91 .1085" 105 .137" HLY36-182
49 .048" 63 .062" 77 .0855" 92 .110" 106 .141" Ideal for trackside tuning. Contains: four each
50 .049" 64 .064" 78 .087" 93 .1125" 107 .145" of eight different metering jets from 70-84; two
51 .050" 65 .065" 79 .089" 94 .1155" 108 .147" .035" pump nozzles; two .037" pump nozzles;
52 .052" 66 .066" 80 .089" 95 .1165" 109 .150" one 35 power valve; one 4.5 power valve; one
53 .052" 67 .0663" 81 .092" 96 .1195" 110 .156" 5.0 power valve; twelve metering block gaskets;
54 .053" 68 .0685" 82 .094" 97 .121" twelve fuel bowl gaskets; plus miscellaneous pump
Note: All sizes shown are for reference use only. Actual control of size shooter, power valve and fuel bowl screw gaskets.
is by flow check. In all instances, a higher stamped number indicates a
greater average flow rate. Do not drill or damage the jet metering orifice.
Change jets to meet specific requirements. POWER VALVES SINGLE-STAGE
Available in standard and high flow, gasket included.
JET ASSORTMENT KIT Part No. Description Part No. Description
HLY36-181 Standard Flow High Flow 2.5" Hg.
HLY125-125
2.5" Hg.
HLY125-25
The pro fes sion al way to track-tune a carburetor HLY125-35 3.5" Hg. HLY125-135 3.5" Hg.
for top performance. Kit contains two each of 36 HLY125-45 4.5" Hg. HLY125-145 4.5" Hg.
dif fer ent jet sizes, rang ing from 64 to 99 packaged HLY125-50 5.0" Hg. HLY125-155 5.5" Hg.
in a plas tic case to keep them separated for easy HLY125-55 5.5" Hg. HLY125-165 6.5" Hg.
access. HLY125-65 6.5" Hg. HLY125-185 8.5" Hg.
HLY125-75 7.5" Hg. HLY125-1005 10.5" Hg.
HLY125-85 8.5" Hg.
ALCOHOL JETS HLY125-95 9.5" Hg.
Standard length alcohol jets are used with the 950 HLY125-105 10.5" Hg.
HP carburetor models HLY0-80542, HLY0-80535 and
HLY0-80498 and will work with a stock float. To order, POWER VALVE CHECK VALVE KIT
use prefix HLY122- followed by the jet number from chart. Example: HLY122- HLY125-500
132 (has an approximate hole size of .132" diameter). Jets have 5/16"-32 UNF Power valve “blow-out” pro tec tion can now
threads. Two per card. be added to older model 2300, 4150 and 4160
Jet No. Hole Size Jet No. Hole Size Jet No. Hole Size carbs. Kit includes a spring, brass seat, check ball and instructions.
132 .132" 150 .150" 172 .172"
136 .136" 152 .152" 176 .176" POWER VALVE PLUG
138 .138" 154 .154" 180 .180"
140 .140" 156 .156" 184 .184" HLY26-36
142 .142" 158 .158" 188 .188" Plug blocks the power valve circuit. An increase
144 .144" 160 .160" 192 .192" of 6 to 8 jet sizes is recommended to compensate for
146 .146" 164 .164" 196 .196" the loss of enrichment.
148 .148" 168 .168" 200 .200"

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