Replacement Metering Rods - Black Hawk Engineering

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

Year	Carburetor		Original Jet		Original Metering Rod
	Tag Numbers	Body Numbers	Number	Diameter	Number	Large Dia	Cruise Area	Small Dia	Power Area
1962-1963	3311S 3311SA 3569S	0-1392 0-1507	120-166	0.0935	75-1654	0.071	.00291	0.054	.00458
1963	3586S 3586SA	0-1580	120-170	0.102	75-1623	0.076	.00363	0.046	.00651
1964	3692S 3692SA	0-1580	120-161	0.104	75-1629	0.078	.00372	0.046	.00683

1965	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

1953-1955	2066SA Corvette		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.

e-mail Address: sales at blackhawkengr dot com
Last Up Date: May 25, 2008 8:11 AM
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