Join Date: Dec 2012
Location: Mount Pleasant (Charleston), SC
Nakgtv noted the "smallish" 132 main jets and I tried to find more information regarding the 7772.12 emulsion tubes, all in the context of the emissions carburetors, but nothing conclusive was discovered.
I agree with Tom and Chas, from left to right, the first two plugs look a little lean. They reflect mixture strength right before shutdown. If the carbs spit-back at idle and idle mixture is what the plugs reflect, then the plugs look as expected. This is likely not a jetting issue but getting the carburetors synchronized and the idle mixture/volume screws set correctly.
The short answer to your question is no or unlikely. If this configuration worked fine before the head swap, it should be ok now.
Maybe a Giulietta 1.6 setup, with 54 idle jets swapped for 58? Do you have aluminum tags on the carb covers with numbers on them?
DHLA40H (emissions model)
2018 Stelvio Ti Sport
1987 Milano Verde
1970 Euro-spec GTV 1750
Refreshing 1750 GTV
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