Standard Replacement Metering Rods & Jets for Turbocharged Corvair(TM) and 6 cylinder Corvette(TM) Engines

The jets and metering rods of these carburetors are subject to wear as the metering rod moves in the jet. In addition, many carburetors have had jet or metering rod changes or alterations in the past 40 to 55 years. There are varying reports of the jet or metering rod sizes originally used for each year. The original combinations are shown in the following table. See the Hints page for detailed descriptions of the locations of the Tag and Body numbers.

Car
Year
Displacement
Turbocharger
Carburetor Original Jet Original Metering Rod
   
Type
Part #

Tag Numbers

Body Numbers

Number Diameter Number Large Dia Cruise Area Small Dia Power Area
Corvair
1962-1963
145 Cu In
300B

3817254 3830651

3311S 3311SA 3569S 0-1392 0-1507 120-166 0.0935 75-1654 0.071 .00291 0.054 .00458
1963
3830651
3586S 3586SA 0-1580 120-170 0.102 75-1623 0.076 .00363 0.046 .00651
1964
164 Cu In
3840830
3692S 3692SA 0-1580 120-161 0.104 75-1629 0.078 .00372 0.046 .00683
 
1965
164 Cu In
300F
3856709
3902S 0-1750 120-159 0.089 75-1654 0.057 .00367 0.048 .00441
1965-1966
4020S 4141S 4141SA 0-1769 120-257 0.0846 75-1716 0.053 .00342 0.048 .00381
 
Corvette
1953-1955
235 Cu In
none

2066SA

120-158 0.084 75-936 0.061 .00262 0.058 .00290

 


Replacement Jet & Metering Rod

Replace your worn or modified original carburetor jet and metering rod with a new precision jet and a matching Black Hawk Engineering metering rod. The original jet sizes are no longer available, so we use aftermarket jets and adjust the metering rod diameters to achieve the same flow rates. We have developed a table of replacement metering rods and jets that provide 3 steps richer, an exact replacement or the original and 3 steps leaner for each of the groups of years. The new jet and metering rod should be used together as a set.

Years
1962 1963-1964 1965-1966
Jet Size
0.098
0.113
0.092
Cruise
Power
Cruise
Power
Cruise
Power
3 Steps Rich
.074 .055 .088 .055 .061 .054
2 Steps Rich
.075 .057 .089 .058 .062 .056
1 Step Rich
.076 .059 .090 .061 .063 .058
Replacement
.077 .061 .091 .064 .064 .060
1 Step Lean
.078 .063 .092 .067 .065 .062
2 Step Lean
.079 .065 .093 .070 .066 .064
3 Step Lean
.080 .067 .094 .073 .067 .065

These replacement metering rods and jets are available from Clark's Corvair Parts www.corvair.com with full shopping cart and credit card services.

If you still don't know what to do

If you are still unsure what to do, send an email to sales at blackhawkengr dot com for suggestions. You will need to include the following information: year of the car, turbo size (150 or 180), carburetor size (150 or 180), carburetor body number and carburetor tag number if known, your current jet number or size, the metering rod number or sizes and a description of the problem you want to solve.

 

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