It is time to replace the fuel injectors in my 1992 BMW 525i E34 M50 2,5L non vanos? One has a tip broken in half. Many fins are broken off too. The only engine enhancements I have is a Dinan performance chip, a K&N replacement filter and a lower coolant temperature switch.

I currently have stock Bosch part # 0-280-150-415 fuel injectors that flow at 18.10# at 3.5 bars (50.75 PSI) fuel pressure.

I have heard about the low cost, better spray pattern, better gas mileage and perhaps improved performance of 19# Mustang fuel injectors with Bosch part # 0-280-150-943. I also like these because they do not have the fins that break off. These are rated at 18.25# at 3.0 bars (43.50 PSI) which is real close to the 18.10# in my stock injectors. The problem is that they would flow at 19.71# with the extra half bar of fuel pressure in my engine.

I am concerned that this is too rich for my engine. The difference in the flow rates is 1.46# and do not know if this is a lot or a little. I heard that the engine computer will adjust for the richer spray at idle. I do not know how the richer mix would affect acceleration. I am a novice and really do not know what I am doing.

One thought is to use in a 3 bar fuel pressure regulator with the 19# Mustang injectors. Another thought is to use Mustang injectors that flow at 16.75# at 3 bar because they would flow at 18.09# at 3.5 bar. That is also real close the the 18.10# in my stock injectors. I don't know if those kind of injectors even exist.

Any ideas or experiences , including sources to purchase from and web sites to reference, that could help me would be greatly appreciated.

NOTE: I pulled these figures from Stan Weiss' Electronic Fuel Injector (EFI) Flow Data Table at http://users.erols.com/srweiss/tableifc.htm#BOSCH and I did the flow conversion for varying fuel pressure at http://users.erols.com/srweiss/calcpchg.htm