User guide

56 — HOT ROD CALC™
APPENDIX B –
HOLLEY JET CHART AND
JET ORIFICE AREA AND CONVERSION CHART
Main Jet Number, Drill Size, and Flow
JET NO. DRILL SIZE FLOW
40 .040 117
41 .041 122
42 .042 129
43 .043 135
44 .044 142
45 .045 149
46 .046 156
47 .047 163
48 .048 170
49 .049 178
50 .049 185
51 .050 194
52 .052 203
53 .052 212
54 .053 221
55 .054 230
56 .055 240
57 .056 251
58 .057 262
59 .058 273
60 .060 285
61 .060 298
62 .061 311