Mustang flows LESS @ 2.5 bar than stock E34... (archive)

The Mustang injectors only flow more than the OEM BMW injectors when run at 3.0 bar, and then only about 2.5%. The fuel pressure regulator is supposed to run the injectors at a constant 3.0 bar so the ECU has a predictable value with which to make mixture adjustments according to the algorithm used, the increase brought about by WOT is to constantly increase volume to keep the 3.0 bar pressure constant, or as near to constant as the equipment will permit.
The Mustang injectors appear to have finer orifices at the tip than the OEM BMW units, three instead of the one in the 714 Bosch units, and finer than the Lucas unit with three outlets. My prediction if one was to test the atomization droplet size would be a finer atomization with the Mustang units.

Pat
Actually you don't run 3.0 except at wide open throttle. The regulator backs it down to about 37psi at cruise and 43 when floored. what i was saying is that we have 3.0 wide open with an injector that flow less anyway. If you go to a bigger nozzle then what happens to the fuel atomization? Also maybe the ford ports and chamber s have more turbulence and swirl to better atomize the fuel. All the 90s mustangs I have worked on have anywhere from 35 to 45 psi also. It just seems like based on the flow of the injectors stock that the bmw would have a finer spray, equal or greater pressure out of a smaller nozzle.

My understanding is that these Ford injectors run 2.5 bar in the Ford engine and that our engines are 3.0 bar.

I agree Bill it should all be a 'wash' with the DME compenstating. Still, my car definately runs better above 3k RPMS....curious. Maybe my previous older injectors were slight blocked/gummed leading to a restricted fuel flow?

Cheers!

Jeff

Follow Ups:

Better recheck your info... Bill R. 14:51 7/18/2001 (1)
- Re: Hans Lain 02:41 7/21/2001 (0)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Questions, comments, or problems, please visit the Roadfly help desk.