Carter Thermoquads ~ 'More General Information'

Qjets have a fixed secondary jet orifice of about .125"
the TQ is still somewhat bigger, and more adjustable with removable jets- below.
theoretically on paper, a TQ will feed a bigger engine, to a higher rpm.

Jet # Size
120-339 .110
120-340 .113
120-341 .116
120-342 .119
120-343 .122
120-344 .125
120-3113 .113
120-3116 .116
120-3119 .119
120-3122 .122
120-3125 .125
120-3128 .128
120-3131 .131
120-5110 .110
120-5125 .125
120-5131 .131 *
120-5137 .137 *
120-5143 .143 *
120-5149 .149 *