My Microsquirt Conversion, MSQ tuning file now posted |
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My Microsquirt Conversion, MSQ tuning file now posted |
rwilner |
Sep 27 2011, 08:29 PM
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#1
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
Ok...
I'm converting my basically stock 2.0L (stock cam, euro Ps and Cs) over to microsquirt. Microsquirt is a megasquirt-derived fuel injection computer that's robot-soldered and factory encased in a weatherproof enclosure. The I/O is implemented as a single, 35-position weatherproof connector. The whole thing is about the size of 2 decks of cards. The system I'm installing was engineered and supplied 100% by McMark. My understanding is that he usually provides these systems for motors that he builds, but I talked him into providing one for me. Below, I will document the install details here for anyone else who talks McMark into selling them a system, or who attempts something similar someday. DISCLAIMER: I won't provide model numbers, prices, or any other info like that in this thread -- please contact McMark directly for those types of details. All I can say is that you get what you pay for and this is a top-notch system that will work for the remaining life of the car. The system provides the following components new:
OK, enough babbling, on to the install! (IMG:style_emoticons/default/chowtime.gif) |
mightyohm |
Apr 10 2012, 08:30 AM
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#2
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Advanced Member Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest |
Wow, nice job spotting that thread about the VR sensor input mod! I would have been banging my head against the wall for a while, before assuming there was a design problem with the VR circuit!
Mark and I had issues with the ignition coil input as well, so it sounds like the MS guys need to rework the entire ignition system in the next rev. If you need to do any more SMT rework in the future, feel free to contact me. I do this stuff for a living and have all the equipment to make changes without damaging the board. (I'm the one who modified your Microsquirt coil driver outputs.) |
rwilner |
Apr 10 2012, 08:38 AM
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#3
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
Wow, nice job spotting that thread about the VR sensor input mod! I would have been banging my head against the wall for a while, before assuming there was a design problem with the VR circuit! Mark and I had issues with the ignition coil input as well, so it sounds like the MS guys need to rework the entire ignition system in the next rev. If you need to do any more SMT rework in the future, feel free to contact me. I do this stuff for a living and have all the equipment to make changes without damaging the board. (I'm the one who modified your Microsquirt coil driver outputs.) Hey Jeff, I started the troubleshooting by measuring the VR signal output AC rms voltage at high rpm with the thought that there was an issue there...at 3500 rpm it's over 100V! I knew I might be exceeding a reverse breakdown voltage for a transistor or diode at that point, so I went digging and found that thread. I'm still not sure why removing C30 was required...it looks like it's just adjusting phase to me...but I don't have the circuit schematics electronically and I don't have PSPICE so I just took a shot based on guidance in the thread and it worked. The V3 MS is a reworked layout with some adjusted component values. The new software version (3.77) also has better filtering of inputs as well. I suspect the ignition coil issues may now be eliminated. Nice job on the mods to the board and nice touch with the conformal coat BTW...I need to touch it up now (IMG:style_emoticons/default/wink.gif) Rich |
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