58 vs 57 injectors

If i remember right the 57 flows 2.85kg/m and the 58 3.08kg/m.

 

Difference of flow is the tip. When comparing a 57/10R0957/10R8501/211-3023 vs a 58/10R0958/10R8502/211-3024 the body group is same(includes plunger) 140-9827, same 154-6006 tappet group, same 170-5234 control valve group, same return spring 225-8492, same o-rings, etc. The difference is the nozzles. 57 uses 117-0484 nozzle group and 58 uses a 117-1149 nozzle group. If you break down each nozzle they use same dowels, main body, VOP spacers, stops, springs, and case. Only difference is tips, 57 uses a 235-2905 and 58 uses a 222-6662.
This being said, a flowed 57 tip (enlarged orfices and possible ground pintle) can flow the same or more than a stock 58. Possible advantage of a flowed set of 57's would be a set of injectors that all flow the same for a smoother more balanced engine.

 

I was on the phone with my fuel injection guy when you posted this. What he told me was a competition type flow job on the ‘57 tip will flow almost the same fuel as the ‘58, but with way less smoke. He built the ‘58’s that are in my BXS and yeah, they smoke a bit. About like a fuelled up 3406B, bit more than a truck length on a shift but run clean otherwise.

 

I want to put 58s in my 04 mbn,no other mods except
Flash to a different ecm file.Will this work alrite ?

 

Would you happen to have physical differences for the parts groups between the 58’s and 59’s ? Or can I get this somewhere in SIS? Thanks!