Great stuff, but looks like $$$. Having to buy two fuel pumps has really hurt the budget. I'll hopefully get some relief if Bosch warranties the first one. I also paid $50 for the aftermarket PWM box when the one I built didn't work properly. A lot of this will be something of a rant, but I think after 21 pages & 200 posts I'm deserving.
Any idea on the cost of one of those wheels, and related parts or
where to find one small enough to fit inside the cover? I searched for a 36-1 motorcycle trigger wheel and eventually found a place called trigger-wheels.com that is overseas. They sell one small enough (2.5" OD) for roughly $30 plus shipping, but then there is mounting it, and relocating one of the pickups (the photo looks like an OEM pickup).
Looking for that ignition module by part # was likewise frustrating. I eventually found one for $60. The problem with "many common cars" is it returns thousands of parts. If you can specify an application example (i.e. 1985 VW Transporter as I did for the Bosch fuel pump in post #1), this makes it a lot easier to find & find one at a good price. I found one on eBay for $45 shipped, and the application there says 1979-2004 Porsche 911. I had to pull teeth like this for a fuel pump, and really don't want to do it for an ignition module.
As it stands, I can build a dual circuit coil driver using some perfboard & resistors I had on hand, the old ignitor box (it comes apart easily, also free

), and a couple of $2.60 transistors. I have a spot for it under the seat. I have no room for other boxes at this point, which was a deciding factor for using the ignitor box.
My point in posting this thread was to make a system that would be repeatable for others that wish to try it using as many common parts as possible.
I searched here to see if anyone had done this, no sense in re-inventing the wheel. The
best thread I found started in May 2009 and 7 pages/ 2 months later in July was more or less abandoned.
There are no lack of partially completed projects. Here on GSR aside from my thread, there are 22 others with the term "fuel injection" in the title, to include one from April 3 of this year:
I never dreamed it would be that much work!
Then there are the unanswered questions and ideas floating around. I'm striving to make what I'm doing:
1. Work,
2. Be as low-budget as possible, and
3. Easy to understand for someone reading this 1 week or 1 year later, which is how I approach all projects, be they added gauges or trunk tail lights.
I'm updating the first post as things change, deleting my posts that are inaccurate or incomplete, and hope to have a clickable table of contents when I'm done. I think I've spent a week or so just bouncing around the various Mega/Micro Squirt versions and pages. I'll see one thing that looks like it may solve a problem, and then when I go to the Tuner Studio software, the setting doesn't exist. I think this is actually worse than learning to speak a foreign language.
Rant over. I'm feeling better now.
