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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