i have a 91 crx si w/a b16a1, i wanna upgrade my injectors, since my stock ones are not doing the job (going all motor), do i need saturaded or peak and hold injectors, i was thinking of doing 310cc, since i have a aem fpr to lower it, if i have to.

 

You can run saturated injectors with your odb0 ecu. Raise the pressure and you'll get a little more flow and alot better fuel atomization.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket &raquo;</TD></TR><TR><TD CLASS="quote">You can run saturated injectors with your odb0 ecu. Raise the pressure and you'll get a little more flow and alot better fuel atomization.</TD></TR></TABLE>

can you explain that more indeepth? I'm not understaning how he can use saturated injectors (which are normally on OBD1 cars) when his EF engine harness and injectors plugs only allow DSM 450 and OBD-0 injectors?

sorry for the questions. I'v just now notice how much info I lack about injectors and interchangeablity

 

OBDI and OBDO harnesess accept the same style injectors with an exception to some JDM injectors that have a notch on them.

You should be able to run satruated injectors on a OBDO ecu. Anybody feel free to correct me on this but I don't see why not.

 

so as for the INJECTOR clips on OBD 1 and OBD-0 they are the same and will clip on... but you'll just have to sorta re-wire them correct?

 

ttt
for more info

 

I was under the impression that the saturated injectors have a great difference in resistance to the peak-and-hold injectors. Doesn't the ECM control the duration, which I thought was different, also.

 

that is what the injector resistor box is for. if anyone wanted, they could run saturated injectors (high impedance) with their OBD0 ECUs as long as they rewired their injectors to remove the resistor box from the circuit.

and generally OBD has nothing to do with what injectors you can run (the ECU doesn't care i mean). all Turbo DSM 450cc injectors are peak and hold regardless of OBD.

 

So, the pulse width of the injector timing will not change, even with the change of modification of the resistor box? Doesn't the ECM control the injector pulse width according to preset parameters tatically varied with multiple inputs, such as load, tps, rpm, and other sensors. If so that would mean the ECM would be sending improper pulse width signals, causing improper fuel mixture. Is the change that more benefical than simply moving up to a larger injector, with fuel pressure modification?

 

To answer my own question.

After research, apparently, the injector timing issue is not a big problem until you reach much higher flow rates. Furthermore, the peak-and-hold injectors have more accurate timing than saturated and require less power to the injectors themselves. Sounds like I'll stay with my original configuration, and only go up to higher flow peak-and-hold, should I need it.

 

so whats the difference?

 

peak hold is low impedence injectors while saturated are high impedence.

basically peak hold injectors are better because you can run bigger injectors and you can fine tune your idle better than with saturated because saturated can't go as low for millisecond timing.