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Jetting and Jet Sizes for Carburetors
Application Choke main jet emulsion air corrector idle jet pump jet needle valve
DHLA 40 - up to 90 BHP 28 112 7772.5/.7 200 50 33 150
up to 120 BHP 30 122 7772.5/.7 200 50 33 150
up to 135 BHP 32 135 7772.5/.7 200 52 33-40 150
Up to 145 BHP 34 142 7772.5/.7 200 55 42 150
Single DHLA40 Std.mini/1600 xf 32 152 7772.5/.7 200 60 48 150/170
Single 40 Modified Mini/xf/Pinto 34 158 7772.5/.7 200 62 48 150/170
DHLA 40 F,G,H,L,R,N TO 90 BHP 28 122 7772.11 200 58 33 150
to 120 BHP 30 135 7772.11 200 60 33 150
to 135 BHP 32 150 7772.11 200 60 33-40 150
to 145 BHP 34 162 7772.11 200 62 42 150
DHLA 45 to 145 BHP 34 135 7772.5/.7 180 55 33 170/200
DHLA 48 to 175 BHP 36 142 7772.5/.7 180 60 42 225
to 210 BHP 38 155 7772.5/.7 180 60 42 225
to 220 BHP 40 165 7772.5/.7 180 62 42 225
220 + BHP 42 170 7772.5/.7 180 62 42 225
               
FRD 32 ( on a 1600 TP flat 4 ) 23 110 7099.1 200 40 40 150
FRD 34 ( on a 1600 TP flat 4 ) 27 128 7099.1 170 45 50 150
Single DRLA 40 or 36 28 145 9164.2 180 65 50 150/170
  30 152 9164.2 180 65 50 150/170
  32 160 9164.2 180 65 50 150/170
  34 165 9164.2 180 70 50 150/170
Twin DRLA40 / 36 1300/1600 & 1700 bus 28 112 9164.2 180 55 33 150
Twin DRLA40 / 36 1300/1600 & 1700 bus 28 112 9164.2 180 55 33 150
Twin DRLA40 / 36 1300/1600 & 1700 bus 28 112 9164.2 180 55 33 150
Twin DRLA40 / 36 1300/1600 & 1700 bus 28 112 9164.2 180 55 33 150
Twin DRLA 45 36 160 9164.2 180 60 40 170
Twin DRLA 45 38 170 9164.2 180 60 40 170
Twin DRLA 48 ( not tri jet ) 38 170 9164.2 180 60 40 170
  40 180 9164.2 180 60 40 170
               
DCOE 40 to 90 BHP 28 112 F16 180 45F9 35 150
to 120 BHP 30 120 F16 180 45F9 35 150
to 135 BHP 32 125 F16 180 45F9 40 150
to 145 BHP 34 135 F16 180 45F9 40 150
DCOM to 145 BHP 34 135 F16 165 55F8 45 200
to 175 BHP 36 145 F16 165 55F8 45 200
to 210 BHP 38 155 F16 165 55F8 45 200
to 220 BHP 40 165 F16 165 55F8 45 200
IDF 40 single 1600cc 28 140 F11 165 55 50 200
1600 - 1835cc 28 145 F11 165 55 50 200
1835 - 2000cc 28 150 F11 165 60 50 200
Twin 40 IDF to 1600cc 28 ( 30 on a 36IDF ) 130 F11 200 55 50 200
1600-1836cc 29 ( 30 on a 36IDF ) 140 F11 210 55 50 200
1835-2000cc 30 ( 30 on a 36IDF ) 145 F11 220 55 50 200
2000-2332cc 28 150 F11 220 55 50 200
Twin 44 IDF to 1600cc 36 155 F11 200 55 50 200
1600-1835cc 36 160 F11 210 55 50 200
1835-2000cc 36 170 F11 220 55 50 200
2000-2332cc 36 175 F11 225 55 50 200
These are starting points for jetting and are very modest ( read safe ) the only way to correctly select jets is to make the selection based on AF ratio and performance measured on the rollers - call for more info !