The OBD1 injectors are not needed. You never choose injectors based apon the "OBD1 equivalent car"...you choose the injectors based on the ECU of choice (ideally). Peak and hold injectors will work with a saturated driver assuming you use a resistor box, but they will not work like they should once you start getting into the higher cc flow rates. Here's why:
The P28 (which comes from a 92-95 Civic Si) uses Saturated Injectors. If you use Peak and Hold injectors (the ones with the Resistor Box), you run the risk of burning your injector drive circuitry in the ECU.
The reason for this is because of how the ECU uses electrical current to tell the different types of injectors, saturated vs peak and hold, to open:
A saturated injector is one thats full of voltage and has a fairly high resistance. The resistance value for this injector will usually be in the 7-14 ohm range. Because of the resistance is high in these injectors, very little current is used to open them.
A peak-and-hold injector is one that must be fed a signal of high current in order to quickly open to its maximum flow point, and then uses a slightly lower amount of current to hold it open. (This is what type most higher flowing injectors are.) These injectors usually have a current of 2 to 4 ohms.
When you have a saturated injector driver trying to drive a peak and hold injector (Like using a P28 to run OBD1 Accord Injectors), you will have several problems:
1) The saturated driver may not be able to generate enough current to even initially open the peak and hold injector reliably.
2)Even if it can open the peak and hold injector, the saturated driver will probably not be able to maintain enough current to keep the injector open for the full pulse width.
3) The saturated driver will try and maintain that high current full current for the full pulsewidth. In other words, it's trying to "peak" for the whole pulsewidth. It never drops off to the "hold" level.
4) The driver can damage itself by continuing to try to drive more current than it was ever designed to.
Here is a pic of the waveform of saturated vs peak-and-hold injector drivers:
Here is a good reference list to what type of injectors come from what car:
http://www.allmotorhonda.com/techpages/injector.htm
