The original jetting for 40DCOE44/45 is 30 mm venturi, 4.5 aux venturi, 117 main jet, 50F15 idle jet, f16 emulsion tube, 180 air corrector - for a 1600 Super.
2L cars with 32mm venturis usually need 130 or 135 main jets and F16 emulsion tubes and 50F8 idle jets. Air correctors mainly affect wide open throttle mixture.
I agree with Slowcreek that installing a wideband AFR meter will let you see exactly what is going on and eliminate the guess work.
You will find usefull information here: https://www.alfabb.com/bb/forums/car...da-sensor.html
76 Suzuki GT500
2011 Jaguar XKR
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