Thread Starter
#1
Friends,
It all started in mid 2011 when started exporing the working of HHO converter, and people discussing the sequential CNG injection kits. My quest for a better fuel economy and a flexible control over the engine calibration started. Inbetween, a bug called CDI conversion kit creeped into my mind. But the fact that it did not have an ignition advance feature programmed into it did not impress me much. Hence the hunt still continued. Checked the websites of Landi-Renzo and similar CNG kit manufacturers. Their ECUs did need the OE ECU for logic and this CNG ECU was a slave who only governed the fuel injection & spark. Again continued with the search. Also had a discussion with Bangalore based tuners. But they wanted me to bring the car to them after equipping the engine with all the essential sensors. I had to drop down this option as it was practically not feasible for me to drive that far, and also I would lost the flexibility in having a control on my car.
After going through many success (and failure stories as well) took a daring step and procured the Megasquirt II DIY ECU kit about 3 months ago. To keep cost under control, and since this is the first time I am building an ECU from components I had purchased the Unassembled ECU kit (a CKD kind of stuff), a stimulator (also unassembled) and a relay board (after seeing this I thought I could have managed one from auto spare part shops locally). A still cheaper option is to buy the ECU mother board alone and procure the components locally, if you have plenty of electronics shops near your locality.
Resources you need:
1. This is the most important of all. Lots of patience, basic understanding of electronic components and their functions.
2. A thin pointed soldering, and lead
3. A small study lamp to illuminate your work bench while you sodler the stuff
4. De-soldering pump, in case if the component has to be removed.
5 A printed version of the assembly guide. MegaSquirt - Electronic Fuel Injection Computer by Bowling and Grippo ©2010
I pruchased this. MegaSquirt-II Programmable EFI System PCB3.0 - Kit w/ BLACK CASE DIYAutoTune.com
All components were neatly labelled and packed in individual covers.
So far I have only spent a lot of time reading the assembly instruction and soldering of electronic components. Power supply regulation, Serial communication and flashing of program have been accomplished. Yet to solder the components for driving the sensors, injectors & Ign coil.
Attached are the pictures of Relay board & the partially soldered ECU board, and the stimulator.
I have 2 choices:
1) I can use the existing points & condensor to ignite and use the ECU for fuel control. The -ve wire of the ign coil will be used to signal the ECU to understand the RPM of the engine.
2) I can use a crank / cam position sensor to input the position / speed of crank / cam shaft.
There are jumpers available on the board, with which we can swap the choices.
It all started in mid 2011 when started exporing the working of HHO converter, and people discussing the sequential CNG injection kits. My quest for a better fuel economy and a flexible control over the engine calibration started. Inbetween, a bug called CDI conversion kit creeped into my mind. But the fact that it did not have an ignition advance feature programmed into it did not impress me much. Hence the hunt still continued. Checked the websites of Landi-Renzo and similar CNG kit manufacturers. Their ECUs did need the OE ECU for logic and this CNG ECU was a slave who only governed the fuel injection & spark. Again continued with the search. Also had a discussion with Bangalore based tuners. But they wanted me to bring the car to them after equipping the engine with all the essential sensors. I had to drop down this option as it was practically not feasible for me to drive that far, and also I would lost the flexibility in having a control on my car.
After going through many success (and failure stories as well) took a daring step and procured the Megasquirt II DIY ECU kit about 3 months ago. To keep cost under control, and since this is the first time I am building an ECU from components I had purchased the Unassembled ECU kit (a CKD kind of stuff), a stimulator (also unassembled) and a relay board (after seeing this I thought I could have managed one from auto spare part shops locally). A still cheaper option is to buy the ECU mother board alone and procure the components locally, if you have plenty of electronics shops near your locality.
Resources you need:
1. This is the most important of all. Lots of patience, basic understanding of electronic components and their functions.
2. A thin pointed soldering, and lead
3. A small study lamp to illuminate your work bench while you sodler the stuff
4. De-soldering pump, in case if the component has to be removed.
5 A printed version of the assembly guide. MegaSquirt - Electronic Fuel Injection Computer by Bowling and Grippo ©2010
I pruchased this. MegaSquirt-II Programmable EFI System PCB3.0 - Kit w/ BLACK CASE DIYAutoTune.com
All components were neatly labelled and packed in individual covers.
So far I have only spent a lot of time reading the assembly instruction and soldering of electronic components. Power supply regulation, Serial communication and flashing of program have been accomplished. Yet to solder the components for driving the sensors, injectors & Ign coil.
Attached are the pictures of Relay board & the partially soldered ECU board, and the stimulator.
I have 2 choices:
1) I can use the existing points & condensor to ignite and use the ECU for fuel control. The -ve wire of the ign coil will be used to signal the ECU to understand the RPM of the engine.
2) I can use a crank / cam position sensor to input the position / speed of crank / cam shaft.
There are jumpers available on the board, with which we can swap the choices.
