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Message: <blockquote data-quote="Rednaxs60" data-source="post: 227000" data-attributes="member: 4617">Further reading, don't read this much in a year.  The Speeduino can use the existing low impedance injectors because of the resistor pack. 3 ohm resistors to give a 4 amp circuit draw, and keeping the wasted spark arrangement.  Thinking that this equates to approximately 2 amp per injector.  The Speeduino as with most other aftermarket ECUs now use high impedance injectors and the ECU drivers work well with these.  High impedance injectors are approximately 8 to 14 ohms.  With a 10 amp injector, the circuit amperage would be approximately 1.2 amps.  The OEM low impedance injectors are Denso 195500-1070 and flow approximately 280 cc/min each.To use these injectors in a sequential injector application, would have to modify the injector wiring circuit and add individual resistors for each injector.  The other way forward is to use high impedance injectors with similar flow rates, and dimensions. Bypassing the resistor pack would be the only wiring mod to be done.  The Speeduino can trigger the injectors individually, just have to ensure that the firing sequence is correct as it fires the individual channels used in a 1/2/3/4 order - channels .  Firing order for the 1200 is 1/3/2/4.  Looked at the Speeduino pinout.  there are 4 ignition circuits.  Would be curious to determine if high impedance injectors would work with the OEM ECU.  Theoretically you would bypass the resistor pack and provide 12 VDC directly to the injectors.Tony - Ansimp - mentioned to upgrade to newer, more modern technologies.  Hmmmmm?</blockquote>

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