Mercedesbenz 450slc 1980 converting from the mechanical kjetronic to a megasquirt. Another major feature of megasquirt is its ability to use feedback from the engine to further refine the required fuel calculation. The latest version for windows, linux, and macintosh can be found at. Since the flywheel is not a missingtooth wheel, it can work with either polarity. Replacing bosch jetronic with megasquirt efi page 2. The model used in this guide, is a uk spec 1989 325i. These systems look similar to cis wlcise externally, although the. Lots of technical jargon intended to add sophistication to a simple system.
The version that comes on the early e30 318i is l jetronic. I never took the time to read this sticky before but that is a great idea for the coolant temp sensor. These early motronic systems integrated the spark timing element with thenexisting jetronic fuel injection technology. How to megasquirt your bmw e30 325i and other m20m30. Some pioneers have converted their 2002s using the ljetronic computercontrolled fi from the early e30 318i. I think that hes playing word games, implying that the black box is controlling by saying that the o2 sensor takes over. These models have a separate ignition system bosch electronic. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to.
There are three outputs from the ms ecu that drive the coil pack. Definitely going to speed density is the better way to go and a missing tooth crank sensor, assuming its not too hard to add physically, is certainly what id recommend. Id like to make it work with a bosch wasted spark system that the vauxhall omega b v6 engines have. Megalogviewer is the software application used to view datalogs. Also i retrofitted the factory pressure sensor with a modern sensor inside. The conversion can be seperated into two phases fuel and spark and each phase can be done completely independently of the other while maintaining vehicle driveability. Although we have written portions of the megasquirt software the recent can.
Please refer to my l jetronic tech articles for those cars. Powered by phpbb forum software phpbb limited deutsche. There is a raised marker on the timing belt cover red arrow, below visible from the left side of the car which will line up with a line between an o and a t when the engine is. It is mounted in a bosch l jetronic case which makes it perfect for l jet cars. It is controlled by the ms software, any retard or advance is electronic and based on engine load, temperature, and o2 feedback. Whether or not you chose to go with megasquirt or learn the black arts behind bosch l jetronic, you will still have to learn the basics of fuel injection and the details of a particular system. The windows 9xmexpvista7 software application you use to tune and configure your megasquirt or megasquirtii is either tuner studio by phil tobin or megatune by eric fahlgren. Download tunerstudioms for tuning and megalogviewer for datalog analysis from efi analytics website. For the price of a new bmw distributor cap and rotor arm, wasted spark can be added to the megasquirt system, boosting performance a stronger spark and reliability no contacts to wear out. Basically what im doing is doing the wiring and setting up the megasquirt board to run the bmw engine. Msii uses a different microprocessor with more resources that allow it to do high resolution fuel control and ignition control. With a few minor variations the same motronic system is used on many other bmws from the 1980s including the bmw 533i, 633i, 733i, 635i, 735i, 528e note. Replacing bosch jetronic with megasquirt efi mercedes. The power of the megasquirt computer is its ability to compute a complex equation with these variables in real time.
With some small modifications to the megasquirt board to accommodate the external map sensor. I dont know how it would be tunable though with the megasquirt. Currently the only software fully supporting all versions of megasquirt 1, megasquirt 2 and megasquirt 3, tunerstudio will simplify your megasquirt experience. The diode blocks current from megasquirt on 86b from flowing to 86a and engaging the starter while the car is running. Download the latest released version of megalogviewer and tunerstudio ms below. A laptop or tuning computer to run the included tunerstudio ms software. For the experienced andor the professional automotive technician, youre looking at. With this you dont have to and can just plug the megasquirt computer right in. The ecu uses an intel 8051 microcontroller, usually with 16 kib of program memory and without advanced. When the megasquirt is ready to power the pump, voltage is applied to pin 86b from ms pin 20 and ecu connector pin 37 should have power and through the coil a and out 85 should have ground to the ecu which is actually grounded inside. Megasquirt plug wired up to the interface pcb that should hold the plug for the lucas 4cu connector.
Because its in an l jet case it will bolt into your orginal efi computer position and will just plug right into the wiring harness. Megasquirt support forum msextra bosch le2 jetronic. Im looking into mega squirt my self for when i comlpete my individual throttle bodies conversion. Then with a laptop you can tune the engine to do what ever you. You will have everything else you need from the ljetronic except an air temperature sensor that is. Whether you are looking to gain indebt knowledge of efi by building a full featured ecu on your own, or simply want to save money building a proven reliable kit, from megasquirt origins the diy spirit is available in partial and complete kits. Replacing bosch jetronic with megasquirt efi page 3. Mspnp2 8792 bmw e30 325i standalone management system plug and play. As you have probably already have noticed your k series has 2 if its a abs model 3 modules, rather difficult to troubleshoot compared to the old airhead bikes. The bmw stock crank sensor for m50s not sure about m20s requires a 10k resistor in line with the crank signal. Apr 10, 2008 just showing off the simplicity of swapping from the megasquirt ecu back to the motronic. Road test today on a stock 20e cih with yellow le jetronic injectors. I hacked the main line going into my rad and spliced on a piece of pipe and welded a bung on the pipe. Fortunately for us, bmw used the m10 motor into the modern efi era and has thus provided us with all the truly hardtofabricate bits we need for the conversion.
Bosch ljetronic fuel injection brandeis university. Im sure most wont agree but i believe a well tuned djet car is pretty nice driving and no fuss. Megasquirt was designed by bruce bowling and al grippo in 2001. Megasquirt still works ok with the burned transistor, not used with the high impedance yellow injectors. Not functionally, but politically, code quality, and hardware design. I want to run the ram pipes open and my current set up is ljetronic which runs the restrictive mass air flow meter. Theres good reason bmw was one of the first makers to completely abandon.
This guide will be a general guide, but i will also add specifics for series 1 e30 owners and l jetronic e30 owners. You can manually transition the settings over into a new firmware version, but. Since so few of these cars were ever made, i havent found one yet that has been converted to megasquirt, so ive been lurking around trying to find anybody else with k jetronic to megasquirt. The main drawback to that conversion is the lack of tuning options there is not much to be done to make the system work well with modified engines, at least. The problem lies in the fact that theyve usually been messed with by someone who doesnt understand the system and that combined with a tired engine can you say low vacuum makes for some drivability issues. Installing your mspnp2 ems is likely to take even the first time installer about an hour at most. Apr 12, 2012 i want to remove the m30b28 engine with l jetronic and replace with. Another megasquirt question bmw e9 coupe discussion forum. The l jetronic principles were later adapted for use in the porsche 911 series models.
Jetzt fliege ich einen umgebauten bmwmotor, damit hatte ich noch nie ein problem. Heres a summary vastly simplified of the conversion from the bosch kjetronic cis to megasquirt efi in my 1978 450 sel. Oss megasquirt, libreems, jimstim tuning software megatunix is a crossplatform tuning application for some of the available diy fuel injection controllers, including the megasquirt ms1, ms1extra, ms2 and ms2extra as well as the libreems efi system and the jimstim ecu stimulatordevelopment tool. This is the only book that fully explains how bosch systems work and how to get the most out of racing and high performance tuning modifications. Megasquirt oem, new and used auto parts for all model. Efi analytics software downloads written by phil tobin sunday, 11 march 2018 00. When the megasquirt group started working on megasquirt ii, it seemed to be the way to go. The first k100s we built had a onepiece intercooler placed in front of the radiator. After about 20 kits were made we found out from a customer in texas that in the summer heat the bike would run hot so we split the intercooler core allowing air a. Megasquirt uses the manifold absolute pressure map instead of the bosch air flow meter. Hpsi black box for l jetronic fuel delivery hybridz. I have the complete engine, flywheel, ecu, speed and reference sensors and engine harness.
Right now i have a fairly conservative table after running an aggressive map. A the 8485 318i models have the bosch l jetronic fuel injection system. It offers a more sophisticated platform for tuning your engine, and is a popular choice for those who have already extensively. Megasquirt technical help for installing efiems systems. Megasquirt first evolved from a do it yourself project to low cost alternative, to now with ms3 matching or exceeding the feature set of the best high end fuel injection controllers. You will have everything else you need from the l jetronic except an air temperature sensor that is usually in the air flow meter. Since my car is a daily driver, i was not looking forward to the inevitable increase in. Firmware updates are provided free of charge to megasquirt customers, see the megasquirt licenses summary sheet tuning software downloads. There is a long list of parts to be collected and modifications to be done in order to fit efi to a 2002.
Megasquirt is the premier doityourself efi controller. The 2nd tps might be plumbed via mechanical similar to the split throttle cable units well used and proven on bmw s. Updated 32816 latest tuningutility software revisions tunerstudioms is the software application that is used to tune your megasquirt efi controller. Megasquirt is a reprogrammable diy ecu engine control unit which is a great tool if you want to learn about engine control systems, you can buy in kit form and assemble yourself, all instructions are available in the online manuals as you are aware if you modify your engine by fitting high compression pistons, wild cams, multiple throttle. M30b34 engine with motronic from a 1985 euro e24 manual. Jul 05, 2008 hi sven, well done on what youve achieved up to now, great work. There is nothing to be gained from a megasquirt injection system except the opportunity to get it very wrong. Ok i used ev1 connectors that the bosch l jetronic system uses quote from you and found out some cars that had them. I am having a kit from bitzracing waiting the installation. An updated version of this document can be found here this is a guide to upgrade the motronic ecu fitted to bmw s e30 3series 1988 to 1991 using the after market ecu megasquirt, and a coil pack for wasted spark. Link to the megamanual links to other megasquirt forums. This is simply a vacuum hose connection from the manifold to the megasquirt ecu.
Apologies, this is a very long winded video, but it is an extremely tedious and boring process and i was trying not to leave anything out. Its ready to run this engine out of the box, with no. Jetronic was the first form of engine management fitted to the e30. Bmw 2002 1973 carb to efi conversion using megasquirt. Megasquirt downloads firmware and software megasquirt efi.
The version that comes on the early e30 318i is ljetronic. With the autotune features in the tunerstudio software and some ignition and. Megasquirt efi conversion bmw e9 coupe discussion forum. The only other thing you need is power for the megasquirt and anything else. Cis motronic this is mentioned only to cover our bases but not. I havent specifically converted an l jetronic system, but given you seem to be replacing virtually all of the bosch stuff anyway, you sound like youre on the right path. L jetronic, ke jetronic, k jetronic and d jetronic systems. The first one is under the fuel tank is the ignition control.
The megasquirt forums is one of the better things about megasquirt efi controller, it has drawn contributions from a huge base of people, and helped megasquirt hardware and software development, many megasquirt efi controller users are not very interested in other ecus. Megasquirt also opens the door to using an alternative ignition system, such as wasted spark. Megasquirt pnp bmw 1988 1992 735 e32 w m30 standalone system plug and play ecu. Basically, the megasquirt takes in all the sensors and spits out spark and fuel.
Megasquirt is a generalpurpose aftermarket electronic fuel injection efi controller designed to be used with a wide range of sparkignition internal combustion engines i. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. Parts list required will add ms3 related stuff, and any additional bmw parts. Tunerstudio ms, the most most advanced and refined megasquirt tuning software available. I have built a prototype board that adapts the factory bosch d jetronic card edge connector in my 1969 squareback to the db37 connector of my megasquirt 2. Most megasquirt users pair their megasquirt with some sort of wideband o2 sensor. The utcis engine management system from unwiredtools consists of a hardware and a software component.
The utcis hardware component installs in place of the oem warmup regulator it replaces bosch warmup regulators used on k jetronic with and without lambda gasoline fuel injected engines. This new processor is on a small circuit board that plugs into the megasquirt ecu assembly in place of the original processor. Mar 16, 2008 basically what im doing is doing the wiring and setting up the megasquirt board to run the bmw engine. Automobile repairbmw3 seriese30 megasquirt and wasted.
Msefi, microsquirt, msgpio, ms success stories, ms user groups, msextra. The megasquirt project has experienced explosive growth other the years, with hundreds of new ms installations occurring every week a. Oem, new and used auto parts for all model trucks and cars. Megasquirt is a complete aftermarket engine management system, designed to replace whatever existing system you have. Get the best deal for megasquirt from the largest online selection at. Troubleshooting an m20 engine installed with megasquirt. A properly adjusted and serviced k jetronic cis system is the preferred and cheapest way to go. The bl wur seems to be the best adjustable option so far and still requires little modification to the rest of the car. It was originally developed and first used in the bmw 7 series, before being implemented on several volvo and porsche engines throughout. Youll need to set a dial back timing light to 10 degrees as the bmw timing marks are mostly intended for setting cam timing. No, we were not measuring fuel pressure but a combination of the pulse width climbing, af climbing, and steady throttle position lead me to believe that supply was diminishing somewhere which the most likely culprit was a clogged fuel filter the truck sat for a long time and possibly had some bugs living in the tank, and it was packed. Ljetronic was often called airflow controlled afc injection to further separate it from the pressurecontrolled. I got a lot of feedback from the last one so i decided to make a writeup for the ms3. I first converted it to motronic and then set it up for wasted spark.
Many people consider going with megasquirt but are scared of rewiring the complete engine harness. As my user name implies, i dont own a benz, but a lotus esprit circa 1986 with bosch k jetronic cis. This pcb will fit the following cars rover sd1 v8 with lucas 4cu range rover 3. Ditching the afm is the path used by alphan and maf to get rid of this very powerrobbing barn door. Jetronic was engineered for the american market, to meet with at the time meet with new emissions standards in the us. The l jetronic was a further development of the d jetronic found in the porsche 914 1. Please let me know how you came to the conclusion that the 318 l jetronic can bring more power.