The peak supplies up to 4 amps to snap huge injectors open quickly, something your ecu cannot do. The injector opening time will change with fuel pressure to, as an example a friend set up a test rig on his desktop. Peak and hold injector driver box miata turbo forum boost cars. Since 1986, marren fuel injection has been focused on developing products and services that improve the performance and overall experience for anything efi equipped. Fuel injectors are controlled by one of two possible injector control circuits called drivers.
Here, when i check fuel injector properly, then i found out something like 3 ohm written on it. The r16 ecu is a fully sequential engine control system with 16 low impedance injector drivers designed for turbocharged and supercharged drag race applications the enclosure is extruded 6061 aluminium that is environmentally sealed and features 2. With a dominator, you can drive 16 low impedance injectors with no external driver. Read on how to tell injectors apart, measure them and how to wire up a resistor box.
Clearing up the confusion in modern fuel injector technology. Why do i have a injector resistor pack box in my car. The driver circuit needs to be able to handle the flyback. Fueltech peakandhold injector drivers are available in a variety of configurations for your low impedance fuel injectors. Ph injector driver module injector drivers megasquirt ems. Nov 03, 2003 the dc resistance of the high impedance injector and the combination of a low impedance injector plus the resistor is about the same so the current the ecu saturation driver has to sink is the same but the voltage rise time on the low impedance injector is faster.
The holley efi injector driver module will have you in complete control of your fuel injected behemoth, featuring easily programmable injector current curves. We do not recommend the use of resistor ballast boxes with these injectors which will void your warranty. Holley efi 16 injector setup 8 cylinder engines setup of 8. Peak hold vs saturated injectors honda d series forum. Hi everybody, thank you in advance for your help, i hope you can help me or give some ideas of how to manage my trouble. Siemens deka 220 lb injector fuel injector connection. The peak supplies up to 4 amps to snap huge injectors open. Na mkiv supras use high impedance injectors that is why they do not have resistor boxes. Fuel components fuel injectors injector drivers engine parts. Each box can control up to 4 injectors current control driver for low impedance injectors 4 channels available in three current versions.
If high fuel demands have you wanting low impedance. The lm1949 is ideal for this application but i would like to use mosfets instead of darlington transistors to drive the. Fuel injector impedance and resistor box basics wrenchin. Difference between high and low impedance injectors. Holley carburetors powered every monster energy nascar cup team and nearly every nhra prostock champion for four decades. Technical information low and high impedance injectors. High vs low impedance injectors turbo buick forum buick. Referred to as a current controlled driver circuit, it has never been used by toyota on vehicles sold in the u. 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. The acceleronics versafueler us patent 6836721 simply splices in between your current ecu and the big honkin injectors that your monster motor needs. Shop for fuel injectors low impedance from top manufacturers like racetronix, delphi aptiv and deka from a trusted source. Injector driver circuits toyota engine control systems. You will only need this harness if you are building a custom wiring harness for your system.
Home products siemens deka 220 lb injector siemens deka 220 lb injector. If you look at the specifications of the injector driver package, it indicates it can flow the. High vs low impedance injectors high performance academy. Interesting that the install pdf says they are 65lb injectors but the replacement part. 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. Due to the inductance of the injector the current is slow to rise, but when it reaches 6amps 0. Four channel injector driver with activation input.
I wanted to make sure that they performed exactly as expected for both high and low impedance injectors. This low impedance injector is designed to work with peak and hold injector drivers typically found in aftermarket ecmpcms as well as dedicated injector driver modules sold by racetronix. When tesing the injector at 12v and no pressure the injector opened quicker then it did at 14v and 45psi. Driver for low impedance injectors toss me an email. This type of driver circuit uses a low resistance injector and limits current flow by controlling the gain of the driver. Can i keep my msd injectors, or do i need to cowboy up and purchase a set of low impedance injectors and an injector driver for my system. Impedance is the electrical resistance of the electromagnetic coil inside of a fuel injector. The hondata injector driver allows you to use high or low impedance injectors without a resistor box either as injectors slaved to the ecu injector output, or as staged injectors. These have coil resistances 8 ohms or more and are the most common in use today. Dont forget to share, like, comment, subscribe and click the post. The acceleronics box with low impedance injectors is a great and simple.
Low z injectors use a peak and hold signal to actuate the injector. Technical information low and high impedance injectors hondata. Each injector driver box has 2 channels with 2 injector driver outputs on each channel. Used hondaacura resistor box designed to run low impedance 23 ohm injectors.
This type of signal uses a two step current and requires resistors to prevent the higher current from frying the ecu. Sep 09, 2006 above that, the low impedence type peak and hold were easier to control, especially at idle pulse width ie. Low impedance injectors get their name from their resistance, which is generally less than 4 ohms. The resistor box reduces that to a voltage that the low impedance injector can handle. Your ecu will never know that its running the acceleronics versafueler instead of the injectors. By putting a resistor inline with a lowimpedance injector, youre limiting the current through the injector, and slowing down the opening time. Your microsquirt efi controller will limit the injector current to 5 amps per driver. Injector type select low impedance or high impedance, both sets must. Peak and hold manual features current control driver for low impedance injectors 4 channels available in three current versions. This may be too much for the injectors, especially if you only have one or two lowimpedance injectors per driver. Drives both peak and hold low impedance and saturated high impedance injectors. Mustknow information on both high impedance and low impedance honda fuel injectors.
If that temperature remains high enough for long enough the driver transistor will be damaged. Diyautotune miata accessories peak and hold injector driver box. Low impedance ecu driving a high impedance injector should operate normally. Description downloads 4 channel low impedance injectors driver unit. Low impedance injectors with a resistance of around 2. Narrowangle single spray cone, fast response, good atomization. With an hp there are not 8 extra outputs to run into the driver, so you would have to run a batch or bank fired system, and that sounds pretty sketchy to tune. Injector current control to ensure both rapid injector operation and low injector temperature. So a low impedance 50 lbhr injector will almost certainly be snappier than a high impedance 50 lbhr injector. Peak and hold manual features current control driver for low impedance injectors 4. 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. This gives more injector dead time, which means that for a considerable period of time, the injectors are on, but not flowing.
Fueltech peakandhold injector drivers steve morris engines. With older generation injectors the low impedance design was implemented to help improve response or latency. Standalone low z injector drivers opinions ive used fuel timing piggy backs quite a but but never used one of these. And there are other high impedance fuel injector also available and its resistance range is between 11 ohms. Housing sealed to ip65 water resistant activation input allows easy injector. Splice it in, hook it up to switched 12volts and ground, and youre on your way to the races. On the plus side the low impedance injectors have faster opening times.
High impedance fuel injectors marren fuel injection. Fjo low impedance injector driver powered by rpmware. The dc resistance of the high impedance injector and the combination of a low impedance injector plus the resistor is about the same so the current the ecu saturation driver has to sink is the same but the voltage rise time on the low impedance injector. The fjo low impedance injector driver is built for the racing environment to withstand heat, vibration, dirt and water. The type of injector youll need for your application will vary depending on your ecu and your power levels. Okay, i have some msd 50 injectors that are high impedance on my 306. We do not recommend the use of resistor ballast boxes with these injectors which will void your warranty additional information. Low impedance injectors open as fast as stockers, providing smooth idle and crisp throttle response, but your factory ecu cant run them. Its a complex load where current and voltage are out of phase. The versafueler provides separate peak and hold logic circuits for each injector. Injectors can be classified in two categories, as either high impedance or low impedance. The primary injectors are always used, and may be s.
This depends on the driver signal that your ecu delivers to the injector. The board has its own 5v power supply, which means it is powered by 12v, and is designed to be. Here is an example of a low impedance injectors pulse voltage, current, and fuel flow. Running low impedance injectors without a resistor box will substantially. An initial fullcurrent period of around 1ms is applied to open the injector peak. High impedance injectors above 7ohms no peak and hold boxes are needed. 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. This lowimpedance injector is designed to work with peak and hold injector drivers typically found in aftermarket ecmpcms as well as dedicated injector driver modules sold by racetronix.
Bosch low impedance injector for all 4cyl and mk23 vr6 cylinder engines. Ms3 with low impedance injectors page 2 efi tuning. 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. Once the injector is open, the hold turns down the current to prevent the injector from overheating. Or bought a set of lowz supra injectors at a price that really was too good to. 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. Feed type does not matter to the ecu as impedance and flow rating do, however the lower intake manifolds are different and will require shavingshimming the injector mounting area for fitment if your engine came with the other type of railsinjectors.
An injector used in a saturated driver system requires a high resistance value across its coil 1216 ohms. The ph injector driver module is optimized for use with 4a peak and 1a hold low impedance fuel injectors. Staged injection allows the use of primary and secondary injectors of different sizes. People have seen that when running peak and hold injectors with a peak and hold injector driver added to an ecu if the ecu isnt peak and hold that they require alot less ms time for fuel. Are the terminator efi tbi injectors high or low impedance. Tell us your yearmakemodel in the box below and your injector. In this episode, i show you how to bypass the fuel injector resistor box on almost any old honda.
Current control driver for low impedance injectors 4 channels available in three current versions 2a0. I didnt really expect to see any problems but if any did exists it would be. An injector operating on a saturated circuit driver high impedence typically has a reaction time of 2 milliseconds, while a peak and hold driver typically responds in 1. The drive circuitry for this type of injector is simple and sometimes referred to as a saturated driver circuit. The stock ecu and im guessing the aem also put out a 12v injector pulse.
830 72 1215 121 1497 804 312 1423 846 45 1479 119 816 614 943 836 1459 1194 162 135 644 245 854 1293 710 1338 132 425 739 1094 203 934 1321 235 567 340 459 932 1302 502 507 1180 187 782 840