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Original intentions of running Delphi 1000cc injectors was scrapped. A friend offered me a set of used Siemens DEKA 1 795cc Low-Z injectors for a great price. Specs (from http://www.racetronix.com/3145FM.html) Static Flow Rate: 74.7 lb/hr = 9.42g/s = 769 cc/min (+/-4%) Dynamic Flow Rate 2.5ms PW @ 100Hz: 16.9 mg/pulse (+/-4%) Coil Resistance: 2.35 Ohms / Low Impedance / Low-Z (Peak/Hold driver circuit required) Spray Pattern: Pencil Connector: Minitimer (Bosch EV1) ---- MembersPage/KevinBlack/InjectorSpecDatabase has a complete looking set of these numbers for the Delphi 95lb/hr injectors. Mirrored here: Delphi Low-Z 95#/hr (with 30v TS diode and 6R8 resistors) * Inj open time @13.2V (us) 0 (because of the 30v flyback, from MembersPage/PhatBob/UserGuide, LowZ section ) * Inj effective rampup (us) 512 * injrampup_battfac (us) 4080 (also because of 30v flyback) * battfac (us) ??? * Injpwm DC (%) 100 * Injpwm DC added @6V (%)0 * Injpwm peak time (ms) 25.5 Barring any new information I will use these as base values for the Siemens injectors. Any suggestions on the figures? ---- The low-z injectors will require power resistors. As mentioned earlier, I can source them in almost any spec I want. I understand the resistors are used for current limiting, but how much current am I aiming for? A couple of quick calculations yields a 12ohm resistor for a current of 1A and 5ohm for 2A (both assuming 2ohm injector resistance and 14V supply). PhatBob's UserGuide states that 6.8ohm/50W power resistors yielded good results on 'Delphi 1000cc injectors'. I have opted for 6R 50W power resistors due to cost and availability. ---- I calculated req_fuel to 3.75 using (6.49 * 2300[cc] / 5[cyl] / 795[cc/min]). ---- As of now I plan to use my current Megasquirt fuel map (with values scaled) as a base map.
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