TQ Factory Metering Rods and Jets
Factory metering rods are all numbered, but the problem is we know of no reference that lists the rod sizes. We have archived a list of the factory rods per the final blueprint specs from Carter Automotive Company. The specs compiled here provide the first comprehensive reference that we know of. These specs give the rod diameter at a glance, to make rod selection and tuning easier. A fatter rod plugs up more of the jet, reducing cross-sectional area, and thus fuel flow. Most TQ rods have three steps: economy, in action when under light throttle cruise; mid, under higher load or throttle opening; and power, high load and WOT. Remember, as soon as the throttle is snapped to wide open, the rod will instantly be up on the power step, no matter the rpm. Primary jets are also numbered, but last three digits of the number relates to the orifice size directly. For instance, a primary jet 4095 is .095-inch or a 4101 measures .101-inch. Similarly, the last three digits of a secondary jet equates to the size as a fraction of an inch. A 5110 jet measures .110-inch, while a 5143 measures .143-inch.

Rod No.EconMidPower
615.059-.040
616.064-.030
655.062-.040
1937.070".046.040
1938.071.051.040
1939.070.058.040
1940.072.060.045
1941.073.061.045
1950.068.057.040
1961.066.056.045
1962.067.055.045
1965.069.061.045
1966.067.052.045
1994.068.043.035
1995.066.040.035
1996.069.048.035
1997.067.045.035
1998.070.057.040
1999.068.054.040
2000.066.054.035
2001.064.051.035
2002.065.052.040
2003.063.049.040
2004.067.058.040
2005.065.055.040
2014.069.054.040
2020.066.052.045
2024.066.054.040
2086.069.061.040
2091.074.064.040
2103.069-.045
2109.069.061.045
2110.069.053.040
2127.074.065.040
2132.074.060.040
2144.06.061.050
2145.069.061.055
2153.067-.055
2154.069.061.055
2159.070.062.040
2173.072.057.040
2174.070.055.038
2179.074.066.042
2195.070.062.045
2210.069-.045
2211.0715.064.040
2271.070.062.035
2272.070.059.038
2273.065.056.045
2278.069-.048
2293.066-.055
2298.066.054.040
2326.066.054.048
2328.072.062.045
2339.060-.040
2340.075-.040
2342.066.052.035
2354.070.055.033
2359.072.054.045
2360.070-.050
2363.070.059.038
2375.070.058.040
2377.066.054.040
2382.073-.054
2385.069-.053