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I have still not purchased new injectors, but as of writing I am looking at ''Delphi Multec 1 95 lb/hr injectors'' (~1030cc). Currently trying to find a detailed spec sheet, but with little luck. Here is what I know (from http://www.racetronix.com/17113744FM.html): *Static Flow Rate @ 43.5PSI (300 KPa) = 95.0 lb/hr / 12.0 gm/sec / 998 cc/min *Dynamic Flow Rate @ 43.5PSI (300 KPa) 2.5ms pulse width and 10ms repetition rate = 2.2 gm/pulse *Coil Resistance: 2 Ohms / Low Impedance / Low-Z (Peak/Hold injector drivers required) *Factory Tolerance: +/-5% (actual +/-7%) *Cone Spray Angle - 17.6 degrees - single spray cone. Approximate cone angle for 90% of spray volume *Connector: Minitimer (Bosch EV1) *Ball/Seat Design with 6-Hole Diffuser Disc *Factory fitted with Viton upper and lower o-rings. ---- I'd like to have some 'ballpark' figures for the following values. Any suggestions? * Inj. open time @ 13.2V - 1000us * Inj. effective rampup - ?us * injrampup_battfac - ?us * battfac - ?s * Injpwm DC - 38% **-http://www.vems.hu/wiki/index.php?page=GenBoard%2FManual%2FFlyback%2FCalculations **- Iinj * Rinj = VBatt * dcpercentage/100 - Uflyback * (1-dcpercentage/100) **- 1A * 2ohm = 14.5V * x - 5.5V * (1-x) -> 2 = 20 * x - 5.5 -> x = 7.5/20 = 0.375 * Injpwm peak time - ?ms * Divider - ? * Alternate banks from h[0] - 4..0 * Fire banks while cranking - ? ---- 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). ---- I calculated req_fuel to 2.89 using (6.49 * 2300[cc] / 5 / 1032[cc/min]). Is it worth it to halve this and double my VE values? ---- As of now I plan to use my current Megasquirt fuel map (with values scaled) as a base map.
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