M30 and M50 Injector upgrades

[smcgowan]

Ok here's the question. What benefits if any to going with new 4 hole style 19Lb injectors over stock? What about new 4 hole style 22Lb injectors? Improved gas mileage? Better idle throttle response? More HP?

[Jon K]

You can't just add more fuel to your injection system without necessary air, or tuning. So, no, not more hp, worse throttle response, worse idle.

M30 guys go to 19# because they're not that much bigger than stock... but 22lb injectors wouldn't be ideal at all.

[genphreak]

You can't just add more fuel to your injection system without necessary air, or tuning. So, no, not more hp, worse throttle response, worse idle.

M30 guys go to 19# because they're not that much bigger than stock... but 22lb injectors wouldn't be ideal at all.19lb Ford replacements flow slightly less than stock BMW. Peeps buy them cos they get 4-holer, save money or think the 19lb is the same or bigger. Its confusing to many as the ratings are always at different pressures let alone different measures :). But when u do the math, it works out that the 19lb is a lower flowrate, which I think is why many who report good things are using the larger 3.5Bar FPRs to give them more squirt. :) nick