beak

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



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.



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.

in a later article, we will cover the injector resistor box install procedure.

Original article:
http://hondaswap.com/general-tech-ar...jectors-30347/

By pissedoffsol

__________________
Don't fry bacon when you're naked.

96 EK Hatch 343whp, and 245ft/lb torque at 11psi - Stock GSR Motor

teggy_chaser

whens that article about wireing the injector resistor box install procedure for peak and hold set up gona come out... lol just kiddin anyway found your article intreguing.... iv got 97 acura integra obd 2 i believe... if i go with a turbo set up would it be more benifical to hook up a peak and hold set up? or to stick with the saturated set up?

lostdeception

Just stick with the saturated injector style. But you might want to switch to OBD-1 injector plugs because of themore options in injector sizes that you can go with. It all depends on what your setup is going to be.