Turbo Mini Forums

You also seem to misunderstand the carb operation - the vacuum over the jet is what sucks fuel up. You don't want to have too much pressure in the float bowl vs the trout otherwise the fuel is pushed up with too little vacuum; conversely too little pressure and there isn't enough vac to draw the fuel up. I suspect the balance here is where you're struggling with; and the dynamic vs static is not the same.

I struggled for a long time with a custom plenum and a simple smaller hole to create the restriction, but once I replicated the OE plenum restrictor, all fueling issues were fixed.