I was woundering if anyone knew if the stock injectors that came onn a 91 civic D16a6 were batch fire of saturated? I am planning on converting to 1991 DSM 450cc injectors and was woundering if I needed to run a resistor box with these injectors.

 

You're a little confused, you're mixing up terms. Batch fire doesn't go with saturated. It's batch fire or sequential, and saturated or peak hold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekay_jeremy &raquo;</TD></TR><TR><TD CLASS="quote">not from me but pretty good explanation:
There are two basic types of injectors that work on Honda and acura cars. How they operate are totally different. Let's take a look.

Peak and Hold:

Peak/hold injectors are low impedence, usually in the 1-4 ohm range. When the ecu calls for fuel to be injected, it sends out voltage via the wire clips until a certain current level is reached (the peak part) (varies by injector size, company). For the duration of 1 pulse width, that current is slightly reduced and held (the hold part).

Advantages of this design:
minimizes the injectors "on" time, resulting in faster response

Disadvantages of this design:
increases coil heat, which can lead to failure over time


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Saturated:

Saturated injectors are generally higher impedence than peak and hold, running in about the 10-15 ohms range. Unlike peak/hold, a saturated injector remains "on" for the entire pulse width.

Advantages of this design:
reduces heat

Disadvantages of this design:
slower response time
can't handel large CC or lb/hr styles due to limitations in its speed.


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So, which should I choose?

There are a ton of factors involved in this.

First, power level. If you're going big, there simply won't be a saturated injector that will support your power level. The largest common saturated injecotrs on the market are 550cc, with 440cc being a common "cap" in saturated size. Most boosted people run peak/hold setups for not only their availibilty, but also their ease of upgrading later on if so desired. simply swap the injectors. no need to re-wire again.
How is your car wired? most obd0 civics and some preludes are wired for peak/hold and have a resisitor box already. No point in changing to a saturated. Obd1+2 civics, and most other honda/acura cars after 1992 are all saturated and are not wired with resisitor boxes. Again, if there is an injector availble in your power range for flow of your car's design type, there's little sense to change.
Price. DSM eclipse/talon 450cc peak and hold injectors fit honda rails and with just a minor modification plug right in. best of all, these can be had for about $50-75 a set of 4 instead of $350+ for a set of aftermarket injectors. Add a $25 resistor box from an obd0 civic/crx, wire it up, and you're good to go in you're saturated car.</TD></TR></TABLE>

 

your 91 civic injectors are (or atleast should've been) peak and hold which means it already has the resistor box. you can just plug the DSM 450s in and go.

heres a pic to help you look and see if you've got the resistor. not your same engine, but for the purposes works.



Modified by rideblitz at 5:16 PM 11/22/2004