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  5. B, BC, BV Jet Sizes
Rochester B, BC, BV 1 barrel carburetor main jet. Jet sizes are usually stamped on the top of the jet, or use a drill bit to determine your existing size.


Original Rochester B, BC, BV Jet Sizes
APPLICATION
TYPE
CARBURETOR NUMBER
SIZE
Buick


1964 6 SPL A/TBC7024148.061
1964 6 SPL S/TBC7024149.061
1965 225" A/TBC7025148.061
1965 225" S/TBC7025149.061
Checker


230"BV7024184.059

BV7025182.058

BV7026083.057
Chevrolet



1932-40 Chevrolet 6 std
B
7001374
.052
1932-52 Chevrolet 6 service carbB
7004475
.052
1932-52 6 S/T
BC
7004620
.052
1941-50 Chevrolet 6 A/T
B
7002050
.051
1950 Chevrolet 6 A/T
B
7003060
.058
1950-51 6 service carb
B
7003986
.056
1950-52 6 A/T
BC
7003526
.057
1951 (early) 6 ST
B
7003152
.051
1951 (late) 6 S/T
B
7003865
.051
1951 (early) 6 A/T
B
7003160
.058
1951 (LATE) 6 A/T
B
7004495
.056
1952 6 S/T
B
7004477
.052
1953 6 S/T
BC
7004915
.058
1953 6 A/T
BC
7004478
.058
1954 6 S/T
BC
7005921
.058
1954 6 A/T
BC
7005922
.058
1954 6 W/GOV
BC
7005982
.058
1955 6 A/T
BC
7007180
.058
1955 6 S/T
BC
7007181
.058
1955 6 W/GOV
BC
7007172
.058
1956 6 A/T
BC
7009254
.058
1956 6 S/T
BC
7009255
.058
1956 6 W/GOV
BC
7009253
.058
1957 6 A/T
BC
7009656
.057
1957 6 S/T
BC
7009657
.057
1957 6 W/GOVBC7009784.057
1957 6 (Canada)BC7011656.058
1957 6 (Canada)BC7011657.058
1958 6 S/TBC7012127.057
1958 6 A/TBC7011102.054
1958 6 W/GOVBC7012502.054
1959-60 6 A/TBC7013000.054
1959-61 OPT 6 A/TBC7013956.042
1959-61 6 S/TBC7013003.057
1959-61 OPT 6 S/TBC7013955.042
1959-61 6 W/GOVBC7013005.057
1961 6 A/TB7019000.056
1962 6 A/TBC7020000.055
1962 6 S/TBC7020003.056
1962 6 A/T OPTBC7020106.042
1962 6 S/T OPTBC7020107.042
1962 6 W/GOVBC7020005.056
1963-64 6 230" A/TBV7023000.059
1963-64 6 230" S/TBV7023003.060
1963-64 6 230" OPT A/TBV7023004.043
1963-64 6 230" OPT S/TBV7023005.044
1965 6 230" A/TBV7025000.058
1965 6 230" S/TBV7025003.059
1965 6 230" OPT A/TBV7025004.041
1965 6 230" OPT S/TBV7025005.042
1966 6 250" S/TBV7026027.060
1966 6 250" A/TBV7026028.058
Chevrolet Truck


1932-40 216"B7001374.052
1932-52 216"B7004475, 7004620.052
1941-50 216"B7002050.051
1950-51 (early) 235"B7002051.058
1951 216"B7003152, 7003863.051
1951 (late) 235"B7003864.058
1952 235"B7004476.059
1953-58 235"B7004468.058
1954-59 261"B7005140.065
1959 STD 235"B7002956.056
1959 OPT 235"B7013953.043
1960-62 STD 235"B7015011.055
1960-62 OPT 235"B7015021.043
1960-62 STD 261"B7015013.064
1963 292"B7023013.073
1963-64 STD 230"B7023011.057
1963-64 OPT 230"B7023021.042
1963-64 C.O.E. 230"B7023017.057
1964 292"B7024009.072
1965 230" 1/2, 3/4. 1 1/2 TON B7023017.057
1965 230" 3/4 TON FWDB7023011.057
1965 230" 1/2 TON CUSTOMB7023021.042
1965 292"B7024009.072
1966 194"B7026019.063
1966 230"B7026017.057
1966 230" OPT 6B7023021.042
1966 250"B7026011.058
1966 250" W/GOVB7026029.063
1966 292"B7024009.072
1966 292" A.I.RB7036009.071
Chevelle


1964 194" S/TBV7023105.060
1964 194" A/TBV7023108.059
1964 (early) 230" A/TBV7024000.070
1964 (late) 230" A/TBV7023000.059
1964 (early) 230" S/TBV7024001.072
1964 (late) 230" S/TBV7023003.060
1965 194" S/TBV7025105.060
1965 194" A/TBV7025108.059
1965 230" S/TBV7025003.059
1965 230" A/TBV7025000.058
1966 230" A/T
BV
7025000
.058
1966 230" S/T
BV
7025003
.059
Chevy II



1962 (early) 4 A/T
B
7020104
.053
1962 (early) 4 S/TB7020103.055
1962 (late) 4 A/TB7020114.054
1962 (late) 4 S/TB7020115.056
1962 6 A/TBC7020108.055
1962 6 S/TBC7020105.059
1963-64 6 S/TBV7023105.060
1963-64 6 A/TBV7023108.059
1965 195" S/TBV7025105.060
1965 195" A/TBV7025108.059
1965 230" A/TBV7025000.058
1965 230" S/TBV7025003.059
1966 194" A/TBV7025108.059
1966 194" S/TBV7025105.060
GMC


P1500-P2500B7023011.057
230"B7026017.057
250"B7026011.058
250" W/GOVB7026029.063
292"B7024009.072
Jeep Kaiser


V6 225"BC7025149.061
Kiekhaefer Marine


194" MASTERBC7020994.061
194" AUXB7020996.060
230" MASTERB7024180.061
230" MASTERBC7024183.061
230" AUXBC7025184, 7024181.060
Oldsmobile


1964 F85 225" A/TBC7024148.061
1964 F85 225" S/TBC7024149.061
1965 F85 225 A/TBC7025148.061
1965 F85 225 S/TBC7025149.061
1966 F85 250" S/T
BV
7026027
.060
1966 F85 250" A/T
BV
7026028
.058
Outboard Marine



153" L-4
BC
7024089
.058
225" V-6
BC
7024087 .061
Pontiac



1951-52 6
BC
7002870
.058
1961 Tempest L-4 S/T
B
7019061
.058
1961 Tempest L-4 A/TBC7019062.058
1962 Tempest L-4 S/TB7020061.058
1962 Tempest L-4 A/TBC7020062.057
1963 Tempest 4 195" S/T
B
7023067
.058
1963 Tempest 4 195" A/T
BC
7023068
.057
1964 6 Tempest 215" S/T
BV
7024164
.060
1964 6 Tempest 215" A/T
BV
7024166
.059


Jet Testing

To determine if you have the correct jets in your carburetor, operate your vehicle for 20 minutes at sustained speeds. Stop and pull a plug. Gray - Good, Black - move down one jet size, White - move up one jet size. Do it all over again until you get a gray plug.

This assumes your engine and electrical system is in good running order.
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