so is this ADA adjustable on the NA engines? ie.....will adding additional fuel help or increase performance in any way? if so how is it adjusted?

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1980 mercedes euro 300D 232000 miles(died,now parts car)
2004 2500 ram cummins diesel
1980 harley shovelhead
1988 anniversery corvette zr1(engine)
1978 240D 4spd 240000 miles (new benz toy)
1946 Cessna 140, Continental 0-200