Now if its a big enough injector to where the duty cycle would be off most of the time it may work ok. Rc1200 injectors driven by versafueler, 10ms, v youtube. Provides precise control of fuel delivery and atomization for increased power, improved throttle response, and better fuel economy. Tell us your yearmakemodel in the box below and your injector will be. The primary injectors are always used, and may be s.
The drive circuitry for this type of injector is simple and sometimes referred to as a saturated driver circuit. So is adding a resistor box really making your system a low impedance system or just allowing you to run. This fine on a high impedance injector because the current flow is rather low. Low impedance this type has a coil resistance of 3 ohms or less and is typically found in larger sized or high performance injectors. The stock ecu and im guessing the aem also put out a 12v injector pulse.
Read on how to tell injectors apart, measure them and how to wire up a resistor box. You will only need this harness if you are building a custom wiring harness for your system. So a lowimpedance 50 lbhr injector will almost certainly be snappier than a highimpedance 50 lbhr injector. So of the two high and low impedance injectors which one provides better. The usual driver circuitry for these type is called a peak hold type. Link engine management the engine control unit specialists. Shop for impedance converter systems from top manufacturers like racetronix from a trusted source. Fjo injector driver sep 20, im not aware of any problems running them off the stock turbo injector drivers and resistor. If you look at the specifications of the injector driver package, it indicates it can flow the. Each box can control up to 4 injectors current control driver for low impedance injectors 4 channels available in three current versions. So a low impedance 50 lbhr injector will almost certainly be snappier than a high impedance 50 lbhr injector. Ecu accessories injector plugs and ballast resistor packs. Injectors low impedance resistor box question dsmtuners.
The resistor box reduces that to a voltage that the low impedance injector can handle. On a low z injector current would be very high, which is why they are considered peak and hold. This isnt really uncommon, by the way, since most aftermarket highflow injectors are the low impedance type. Oct, 2012 this is a test of rc 1200 low impedance fuel injectors driven by an acceleronics versafueler, a true peak and hold low impedance injector driver.
When you go back and select injection type multiport or tbi, whatever was configured previously on that page for injector set is changed to high impedance, 9999. Stock ecu uses a saturated injector firing scheme which just provides a ground path for the injector for the entire duration of the pulse width. Each box can control up to 4 injectors current control driver for low impedance injectors 4 channels available in three current versions 2a0,5a 4a1a 8a2a. As for the easytune, the easytune increases voltage at the injector, high impedance injectors receive a higher current because the current is not reduced by the resistor pack. This can easily be measured by a multimeter across the two electrical terminals. I have read that the aem injector driver does not like the bosch s. After dialing down the ms i now have a linear base fuel map. You have to have a separate driver box for low impedance. Engines that need high pressure fuel injection rely on injector driver modules to control the. The resistance is too low and the driver chip can be damaged due to excess current flow and heat. The wiring at the resistor box should have 1 more wire than the number of cylinders, 5 for a 4 cylinder, 7 for a 6 cylinder, etc. I have a friend in town that cleans and then flow tests injectors for very cheap. Current control driver for low impedance injectors 4 channels available in.
Bosch 160 lb high impedance injectors ford mustang forums. The temperature increase will depend on your driving. Shop for fuel injectors low impedance from top manufacturers like racetronix, delphi aptiv and deka from a trusted source. If your car came with a low impedance injector and a resistor box, it will need to be bypassed. I wanted to make sure that they performed exactly as expected for both high and low impedance injectors. However, the output from many passive devices, such as a high impedance microphone or passive guitar pickup can have much greater output impedance. Also, the terminator tbi unit actually uses mpfi type injectors, not true tbi type injectors. If you dont use a resitor box of some sort you will fry your new upgraded injectors. There are two common types of driver circuits currently in use on toyota efi engines. Ms3 with low impedance injectors page 2 efi tuning. Driver for low impedance injectors toss me an email. Apr 01, 2008 mustknow information on both high impedance and low impedance honda fuel injectors. The acceleronics versafueler us patent 6836721 simply splices in between your current ecu and the big honkin injectors that your monster motor needs.
Why do i have a injector resistor pack box in my car. On a lowz injector current would be very high, which is why they are considered peak and hold. Early hondas used low impedance injectors with a resistor pack. You need to determine the impedance of your current injector. The fjo low impedance injector driver is built for the racing environment to withstand heat, vibration, dirt and water. Add to cart 160 lb precision turbo ev1 low impedance. Siemens deka 220 lb injector fuel injector connection. When the 50 lbhr high impedance injectors on the acceleronics test car were replaced with 75 lbhr low impedance injectors, the ecu setting that adjusts for sluggishness had to be set back to stock. When the 50 lbhr highimpedance injectors on the acceleronics test car were replaced with 75 lbhr lowimpedance injectors, the ecu setting that adjusts for sluggishness had to be set back to stock. I thought low impedance were better than high impedance. I was also considering removing the resistor box located to the right of the. High impedance injectors vs sprint 500 official haltech forums. Dont forget to share, like, comment, subscribe and click the post. Just make sure the ballast resistor is rated for the power you will be using.
The output from most electronic devices in an audio system will be of low impedance in nature, usually 150 ohms or less. I didnt really expect to see any problems but if any did exists it would be. The versafueler provides separate peak and hold logic circuits for each injector. The peak supplies up to 4 amps to snap huge injectors open quickly, something your ecu cannot do. Apparently you can get a separate peakandhold injector driver box for these type of applications which would work better. Oct 16, 2017 in this episode, i show you how to bypass the fuel injector resistor box on almost any old honda.
And there are other high impedance fuel injector also available and its resistance range is between 11 ohms. If that temperature remains high enough for long enough the driver transistor will be damaged. The ph injector driver module is optimized for use with 4a peak and 1a hold low impedance fuel injectors. Fueltech peakandhold injector drivers steve morris engines.
Allows the use of lowimpedance injectors on computers designed for highimpedance injectors. Four channel injector driver with activation input. Then take the positive and negative leads from multimeter and put on each terminal of the injector. All injector dynamics injectors are high impedance. Interesting that the install pdf says they are 65lb injectors but the replacement part number 522801 lists them as 80lb. Difference between low impedance fuel injector and high. The board has its own 5v power supply, which means it is powered by 12v, and is designed to be installed in its own case. Injectors can be classified in two categories, as either highimpedance or lowimpedance. Im wanting to drive 3 pairs of high impedance injectors but they are only 12.
Injector driver circuits toyota engine control systems. Staged injection allows the use of primary and secondary injectors of different sizes. Low impedance ohm injector this is from the test of the 1550 cc ones i have, if plugged into a high impedance harness without a resistor box. By adding a resistor box to a high impedance ecu really. In this episode, i show you how to bypass the fuel injector resistor box on almost any old honda. Mustknow information on both high impedance and low impedance honda fuel injectors.
Fueltech peakandhold injector drivers are available in a variety of configurations for your lowimpedance fuel injectors. Only vehicles with fuelinjection systems will use an injector driver module. The ecu is still stock but isnt that what a low impedance injector driver is for. Splice it in, hook it up to switched 12volts and ground, and youre on your way to the races. Changing from high imp to low imp injectors engine. Technical information low and high impedance injectors. With a low impedance injector the injector should get a peek signal then drop down then shut off.
May, 2011 as for the easytune, the easytune increases voltage at the injector, high impedance injectors receive a higher current because the current is not reduced by the resistor pack. Technical information low and high impedance injectors hondata. In a peak hold system, the driver circuit allows a high current for a short time to help turn the injector on quickly. Additional information can be found about this product by clicking the read more link below. I am hoping to hit 850 hp or so with the turbo i have now and hp with an 88 mm turbo later. Impedance is the electrical resistance of the electromagnetic coil inside of a fuel injector. It is apparent that using a low impedance injector without some form of current. Add the appropriate ballast resistor so that the system impedance is the same with the low impedance injector as your original injector. Interesting that the install pdf says they are 65lb injectors but the replacement part. Fjo low impedance injector driver powered by rpmware. High impedance injectors vs sprint 500 official haltech. This depends on the driver signal that your ecu delivers to the injector. This seems to cause problems syncing the custom config with the ecu which requires low impedance injectors set. Is the minimum of 8ohm impedance for each injector driver on a sprint 500 a firm limit or just a guide so people dont try and run low impedance injectors.
The easiest fix is to add an injector resistor box. Low impedance injectors siemens deka 220 lb injector. Injectors can be classified in two categories, as either high impedance or low impedance. This design uses the tried and tested national lm1949 injector drive controller chip. Fuel injector impedance and resistor box basics wrenchin. Btw, the injectors i have are brand new in the box. Engines that need high pressure fuel injection rely on injector driver modules to control the fuel injection system. With a high impedance ecu it just sends out one static signal. The hondata injector driver allows either the use of high or low impedance injectors without a resistor box either as injectors slaved to the ecu injector output or as staged injectors.
Drives both peak and hold low impedance and saturated high impedance injectors. The hondata injector driver allows either the use of high or low impedance injectors without a resistor box either as injectors slaved to the ecu injector output or. Injector plugs and ballast resistor packs link engine. Low impedance injectors with a resistance of around 2. Holley v5 build 110 fuel system injection type custom low. Are the terminator efi tbi injectors high or low impedance. I thought that the new style injectors like the bosch 160 high impedance might save me from having to use adapters and separate drivers. The mapecu dual channel low impedance injector driver is a true 4.
The low impedance injector driver allows the mapecu3 or mapecu2 to drive as many low impendence injectors as required using a single switched output. Ph injector driver module injector drivers megasquirt ems. The ph injector driver module compensates for low voltage conditions cold weather, startup, etc. Here, when i check fuel injector properly, then i found out something like 3 ohm written on it. If that the case their injectors are low impedance why does the non turbo dsm don t use the resistor box. Low impedance injectors open as fast as stockers, providing smooth idle and crisp throttle response, but your factory ecu cant run them.
Below are links to some explanations that are far better than i could pull off in explaining what the difference between these methods happens to be. Honda engine computers require a total injector impedance of about 10 ohms so a resistor pack is needed whenever the stock saturated injectors are swapped with peak and hold. Low imp driver box running an unchanged base fuel map i went pig rich at transition. Low impedance injectors can not be just used with our cars you need an injector driver box or computer that is designed to run them. Running low impedance injectors without a resistor box will substantially increase the temperature of the transistor driver ic due to the increase in current flow. Na mkiv supras use high impedance injectors that is why they do not have resistor boxes. Your ecu will never know that its running the acceleronics versafueler instead of the injectors.
Dec 30, 2018 fjo injector driver sep 20, im not aware of any problems running them off the stock turbo injector drivers and resistor. This is a test of rc 1200 low impedance fuel injectors driven by an acceleronics versafueler, a true peak and hold low impedance injector driver. All of our injectors, when purchasedin sets, are guaranteed to flow within 1% or less and are rated at 43. If they are standard i would expect them to be high impedance which can easily be used in our car as long as you have an adapter to connect them to the stock harnesses. The hondata injector driver box allows the use of high or low impedance injectors without a resistor box either as injectors slaved to the ecu injector output or as staged injectors. Once the injector is open, the hold turns down the current to prevent the injector from overheating. By putting a resistor inline with a lowimpedance injector. One uses an external solenoid resistor and a low resistance injector, the other using a high resistance injector without the solenoid resistor.
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