The microsquirt is a great match for 4cylinder engines and can also run v6, v8 and other engines too. Both types can be used with megasquirt although high impedance tend to be easier to use. New injectors will specify which type they are or list the ohms. Low impedance injectors siemens deka 220 lb injector. Low or high impedence injectors mr2 owners club forum.
It includes four peak and hold fuel injector drivers allowing for use of highimpedance hiz or lowimpedance lowz injectors. Note that it covers a portion of the proto area and the high side driver circuit on a v1. If you are running lowimpedance injectors you should also pickup the flyback. I intend use megasquirt to drive 2 banks of 4 injectors using pwm with a duty cycle of 25% to limit injector powerheat dissipation.
Megasquirt support forum msextra maximum low impedance. If you are running lowimpedance injectors you should also pickup the flyback board kit as an upgrade to the unit. Lowimpedance injectors require some form of current limiting. No need for injector resistors and injector pwm should be turned off. The symtech labs ph injector driver module is the only.
If you want to use megasquirt to control a distributorbased ignition, this is often the best choice. Diy autotune megasquirt engine management systems now. The microsquirt is a great matchfor 4cylinder engines and can also runv6, v8 and other engines too. The fuel injector drives will max out at 5 amps each, enough to drive one low impedance or 4 high impedance injector per bank. The megasquirtmicrosquirt is a community supported project aimed at the experienced installer and knowledgeable enthusiast. Our line of universal and vehiclespecific fuel injectors includes flow rates from 15 lbs. Megasquirt has pulse width modulation to limit the current. Fjo low impedance injector driver powered by rpmware. Megasquirt mustang plug and play gen 2 ecu tuner kit 9495 5.
This can easily be measured by a multimeter across the two electrical terminals. The microsquirt is the latest addition to the popular megasquirt family. Megasquirt pnp gen2 for 9000 miata track dog racing. If i am set up for high impedance injectors, are my pwm setting correct, or am i at risk of burning something out. The highresolution megasquirti code can help in this situation, but you lose the pwm current limiting mode so you have to run resistor packs with peak and hold lowimpedance injectors.
The right fuel injector must combine the elements of fitment, coil impedance, flow rate, and tuning data into one injector specific to your engines needs. Our online catalog represents only a small fraction of the items we carry. Low impedance fuel injectors are preferred over high impedance, or saturated, fuel injectors for their precision and quick response time. Megasquirt support forum msextra high or low impedance. The ms1 cpu is endoflife and available while supplies last. Low impedance injectors with a resistance of around 2.
Driver for low impedance injectors i know their is a convertor box, which i own one, but i would like to simplify the process, by just simply modding the pcm drivers. If you are unsure, measure them with your meter on the ohms setting. Pimp engine management systems made in the usa there are three different ecus in the pimp family currently available pimpx, pimpxs, and pimpxshift, all of which are ms3 megasquirt 3 based, plus one legacy version pimp that was ms2 megasquirt 2microsquirt based that we still sell parts, services, and accessories for but is no longer available new. Ms3 with low impedance injectors page 2 efi tuning. Megasquirt mustang plug and play gen 2 ecu tuner kit 8693 5. If you are running high impedance injectors greater than 10 ohms, then set the. Megasquirt offers a full range of engine management systems, from singlecylinder up to 16 cylinders and beyond.
Weve got all the top brandsdeatschwerks, venom, acdelco, bosch, delphi, fast, and many others. Injector dynamics id2000 2200cc high impedance fuel injector the finest monstersized fuel injector available on the market, the injector dynamics id2000 fuel injectors are a. Injector drivers can drive high impedance injectors directly, or low impedance injectors with inline resistors 8 independent ignition outputs, with support for sequential ignition ignition outputs are compatible with many ignition modules and smart coils with internal ignitors. Megasquirt engine management systems triggerwheels. I thought the low impedance injectors would be better, i heard they are more responsive at lower rpm. What resistance to use with low impedance injectors.
If you are running high impedance injectors greater than 10 ohms, then set the pwm time to 25. It is by being supported by the online community that enables the product to be offered at such low prices. As i recall, megasquirt defaults to high impedance in the setup. You need to set the pwm parameters to match your injectors. Megasquirt mustang plug and play gen 2 ecu tuner kit 86. Controlling both ignition and injection in an extremely compact form factor it is a very capable system at a very attractive price point.
I know the ecm for the grand nationals can be altered to do this, since i have had it done to mine. The fjo low impedance injector driver is built for the racing environment to withstand heat, vibration, dirt and water. For lowimpedance injectors less than 3 ohms, you need to limit the current to avoid overheating the injectors. Microsquirt is a miniature, watertight version of megasquirt. Width modulation pwm, which is a software solution built in to megasquirt. If i decide to use low impedance 440cc injectors, does a stock bodied. If you are running highimpedance injectors greater than 10 ohms, then set the. Injectors that have too small a flow rating can starve the engine of fuel at full power. The injectors are used with 6 ohm series resisters in the original djetronic circuitry limiting maximum current at. Megasquirt mustang plug and play gen 2 ecu tuner kit 94. The software application you use to tune and configure your megasquirtii or.
The bitzracing cis to efi kit uses the megasquirt ecu for fuel management customized for the bitzracing efi kit. Onboard peak and hold drivers support both high and low impedance injectors no external ballast resistor is needed. So lowimpedance injectors must have some form of current limiting. Or for lowimpedance injectors you can use resistors see below. The mspnp2 includes a very impressive feature set allowing you to convert a distributor based engine to distributorless ignition and sequential or semisequential fueling. Here is an example of a low impedance injectors pulse voltage, current, and. For low impedance injectors, ground the gnd hole on the adapter board to a gnd hole on the main board do not connect to sg. It resembles a v3 board in its features, only without provisions for large numbers of low impedance injectors. Ph injector driver module injector drivers megasquirt ems. Designed with the diy tuner in mind to give your mustang all the options of a custom engine management system at a fraction of the cost.
If you are running low impedance injectors you should also pickup the flyback board kit as an upgrade to the unit. The highresolution megasquirt i code can help in this situation, but you lose the pwm current limiting mode so you have to run resistor packs with peak and hold low impedance injectors. So i wanted to try megasquirt first with my previous setup on the 2. Qs on fricfrac ms setup and injector impedance megasquirt. More power means faster response for the same injector architecture. They handled the wiring and programming and tuningand charged you a pretty penny to do so. This will tell the megasquirt to ignore our ignition table and hold a fixed advance.
Now, hoping matt cramer addresses the next question i have. Easy to install and setup, this standalone ecu comes with a 5. If the resistance is between 8 and 16 ohm you have high impedance injectors. The ecu itself will drive low impedance injectors, but with stock wiring it can experience noise issues. This value is a static value that the megasquirt will use to command ignition timing. High impedance injectors can run on 12 volts without problems. Controlling both ignition and injection in an extremely compact form factor itis a very capable systemat a very attractive price point. I am using the original the djetronic injectors bosch 0280150034 and these are low impedance at 2. To do sequential, you need to wire injectors to the ms3x output above. Low impedance injectors typically react faster and are more precise, but there are many high quality high impedance fuel injectors available these days.
Apr 07, 2009 if you are running high impedance injectors greater than 10 ohms, then set the. Check out the broad offering, there is something for everyone. Early hondas used low impedance injectors with a resistor. Ms3 supports only semisequential, but will do low impedance injectors. If you are running highimpedance injectors greater than 10 ohms, then set. Your megasquirt system supports either type of injector. For low impedance injectors less than 3 ohms, you need to limit the current to avoid overheating the injectors. The ultimate provides 10 programmable peak and hold injector channels for driving any saturated high impedance or peak and hold low impedance injectors as well as loads of additional io eliminating the need for any other controllers, saving you unneeded complexity and weight. It includes four peak and hold fuel injector drivers allowing for use of highimpedance hi. For up to 4 highimpedance injectors per bank, the driver will be fine, and high impedance. I think that stock gpz1100 injectors are low so that is something for everyone to be aware of who might use stock hardware. It has been used in all sorts of conversions from drag cars to land speed record vehicles.
This allows full current to the injectors throughout the pulse width. Efi express is a company dedicated to providing quality upgrade parts, hardware, and software for a range of european vehicles. Builtin 2step rev limiter launch control with flat shift. However, you cant do this if you have low impedance injectors. If you are not comfortable with this then the megasquirt and microsquirt systems perhaps arent for you. Technical information low and high impedance injectors. Since power is voltage times current, more current means more power. This is a lot to ask an injector line up consisting of only a handful of options. Add to cart 160 lb precision turbo ev1 low impedance. Pimpx includes capability of controlling 4 low impedance injectors. Tuning software is windowsmac based and is fully customizable. If i am set up for low impedance injectors, am i using pwm, a flyback board or resistors.
Diy autotune megasquirt engine management systems now available at summit racing setting up and tuning an efi engine for ludicrous power used to be something best left to a dedicated tuning shop. Its simple physicslower resistance means that you get more current for a given voltage. This is also an excellent tool for testing your megasquirt ecu while you are. I have used some of the fuel maps posted in other threads as well as some other sources to get a basic fuel map set up. When it comes to replacing fuel injectors, step one is shopping at summit racing. The high impedance ev14s are not bad, but the low impedance version of them would be even better. It includes four peak and hold fuel injector drivers allowing for use of high impedance hiz or low impedance low z injectors. This little ecu has thousands of users and is flexible and user friendly. The v3 microsquirt fuel injector drivers will clamp the current flow at 5 amps each, enough to drive one lowimpedance injector, or up to 4 highimpedance injectors, per bank. Fuel injectors are not a onesizefitsall type of product. Low impedance injectors require some form of current limiting.
Lower rev limit is the level at which the the fuel is reenabled in fuel cut mode. Do i need low impedance or high impedance injectors. Injectors and fuel supply megasquirtr faq main page. This is not a peak and hold driver, but it does clamp the current at 5 amps, so it can be used with one lowimpedance injector per bank, however the close time. If you are running highimpedance injectors greater than 10 ohms, then set the pwm time to 25. Here is an example of a low impedance injectors pulse voltage, current, and fuel flow. They made high impedance injectors that far back, but the turbo application required more fuel flow thus low impedance. We also host a program called mspnp on demand where we can create. I just realized mustang injectors are high impedance so ill just use a set of those and everything will be fine. Designed for use with megasquirt ems systems, the symtech labs ph injector driver module supplants the injector drivers on either v2. Megasquirt pnp2 standalone ecu by add serious tuning potential to your 19941995 5. If you have low impedance injectors less than 4 ohms, set the. What impedance injectors is it currently set up for. The amount of time required to open and close the injectors is specified in megasquirt as the injector opening time usually about 1.