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map ecu2 and turbo e28's

Posted: May 18, 2007 6:43 PM
by M. Holtmeier
Not a good combination if you ask me. Has anyone here had experience with performance motor research' map ecu 2?
I though I'd use this piggy back on my turbo build but am now wishing I had gone with megasquirt! The big problem I am having is their ignition inverter setup, which I have to use as the ignitor is built into the Motronic unit, does not want to work. The guy sent me a reworked relay with some resistors and a transistor inside, told me to use a bosch 034 ignitor and that would work because they "have done it before." All the car does is throw "ignitor errors" and the rpm signal reads 0-5000rpm,the engine just surges terribly. At this point, I've messed around with so many elec components I could have built a MS by now. Here's a link to the 4 pages of back and forth with one of the engineers to try to make it work- if anyone is interested!!Just though I'd throw this out there to see what others have done.
At the very least, maybe this will influence someone's decision if they looking at engine management for their own car...

http://www.performancemotorresearch.co. ... d.php?t=48

Posted: May 18, 2007 7:50 PM
by Jeremy
:confused: What's an "ignitor"?

Posted: May 18, 2007 7:53 PM
by Martin in BellevueWA
$695 for a piggyback that requires a ton of tuning? Seems with a wideband o2 sensor & vacuum/pressure gauge, it could be made to work ok. I spent way too much time tuning a similar but less feature-intensive split second box, the psc-001. Both of these piggybacks use a tach signal to make the thing driveable off idle & part -throttle. I do like the psc-001.
I've got the lc-1 wideband output to the dme with 'stoich' at 14.15-14.25afr; it runs about as well as it did with the modern performance maf piggyback.
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Posted: May 19, 2007 11:22 AM
by M. Holtmeier
I will say, after a brief argument, that tech support has been phenomenal. But then again, I like technical challenges. It is, my job...

ignitor

noun
1. a substance used to ignite or kindle a fire [syn: igniter]
2. a device for lighting or igniting fuel or charges or fires; "do you have a light?" [syn: lighter]

igniter

noun
1. a substance used to ignite or kindle a fire
2. a device for lighting or igniting fuel or charges or fires; "do you have a light?" [syn: lighter]

Maybe the industry standard is with an "e" but I wanted to add a european flavor.

Posted: May 19, 2007 11:48 AM
by Jeremy
Well, see, I would call that a "spark plug". Unless you're talking about the coil . . . in which case neither of these is built into the the Motronic control unit.

Nothing in the Motronic unit fits the definitions you provided. There is the spark control unit, which controls when the coil fires to activate the spark plug and fire the mixture in the combustion chamber, but neither the coil nor the spark plugs would have any use for a relay.

Now, given that the Motronic is a printed circuit board, I don't see how you could replace part of it with a different unit (this Bosch 034 ignitor you referred to), unless you're talking about the chip.

I'm honestly not trying to be a prick, I just have no clue what the hell you're talking about, and I'm trying to figure it out.

Jeremy

Posted: May 19, 2007 7:43 PM
by M. Holtmeier
I though you were giving me sh**. The spark control inside the Motronic can also be called an ignitor. The map ecu2 uses an inverter to change a negative going pulse that eminates from the Motronic and turns it into a positive going one, one that can be controled by the mapecu2. An external ignitor is then used(mine is standard on early Mitzubishi galants-but I'm sure there a million other applications as it is made by Bosch) to trigger the coil (-).
If you open up the Motronic, the spark control-or ignitor- is the circular metal thing that is heat sinked to the case. It has 3 leads running to it. The bosch bim034 is an ignitor that has only one control to work accordingly as a replacement of the internal Motronic spark control. The "relay" I was referring to earlier is a reworked prototype inverter that uses a relay housing as an enclosure. You see, the mapecu2 just came to market in Feb. and they haven't officially released the inverter to work with my car. One of the engineers has been helping build a circuit "pre-production" to get my car going. Follow the link in the first post and halfway down the first page there's a pdf for the wiring and inverter. Sorry, I haven't figured out how to post pics yet.

With all that being said, my initial post is kind of jumped the gun a little. A month ago I was trying to get the mapecu2 to work with my naturally aspirated engine, before I installed the turbo, and it was one problem after the other. I finally got PMR to send me a prototype inverter and decided to install the turbo and the hardware. Thinking their inverter was "it" and I would have no more problems, the car wouldn't run. So I posted this more or less as a warning, but things have changed since then. Like I said, these guys are pretty good at helping you out. I was getting responses to emails to what seemed around the clock. Long story short, we made a minor change to prototype inverter and I uploaded a map table avail at thier website and the car is running smooth now. Of course I still have bugs to work and final tuning for boost but if I were to buy this setup with thier production inverter and ignitor setup, I would be tuning in less than an hour. Air flow meter is gone and the engine runs smoother than before, even on a base map.