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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#61
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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) |
914werke |
Feb 8 2012, 01:11 PM
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#62
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"I got blisters on me fingers" Group: Members Posts: 10,141 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
Good head of hair on the boy, Congrtats!
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rwilner |
Feb 23 2012, 09:51 AM
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#63
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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 |
Slowly working out my issues as time allows...
My mom and dad were in town, so while my mom was on baby duty, my dad and I got some work done on the car. I replaced the sealed beam tungsten lenses with the H4 kit from pelican and also replaced the ignition switch. But the bigger win was getting a working tach. There is definitely a way to get the microsquirt to work with the stock tach. But, time is at a premium with me these days so experimenting with a charge-pump circuit is not in the cards. I selected an aftermarket tach based on a suggestion from another member here -- an equus 8080. PRetty short money from summit ($110 I think.) This is the same company that makes the special timing light that works correctly with my new wasted spark DIS. It is also the only aftermarket tach I've found that has an inductive spark plug pickup option! Very cool. Turns out I didn't need that because this thing picked up the signal from the microsquirt Tach output like a champ. I relocated the turn signal (green LEDs) and hi beam (amber LED) indicators to the gauge bezel. Also shot the gauge bezel with a fresh coat of enamel. (IMG:http://www.914world.com/bbs2/uploads_offsite/lh5.googleusercontent.com-11530-1330012301.1.JPG) Only remaining issues are my oil temp gauge and O2 sensor readings. I keep forgetting to post the .msq... |
falconfp2001 |
Mar 6 2012, 02:41 PM
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#64
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Pancho Pantera Group: Members Posts: 451 Joined: 5-December 10 From: Downey, CA Member No.: 12,456 Region Association: Southwest Region |
Slowly working out my issues as time allows... My mom and dad were in town, so while my mom was on baby duty, my dad and I got some work done on the car. I replaced the sealed beam tungsten lenses with the H4 kit from pelican and also replaced the ignition switch. But the bigger win was getting a working tach. There is definitely a way to get the microsquirt to work with the stock tach. But, time is at a premium with me these days so experimenting with a charge-pump circuit is not in the cards. I selected an aftermarket tach based on a suggestion from another member here -- an equus 8080. PRetty short money from summit ($110 I think.) This is the same company that makes the special timing light that works correctly with my new wasted spark DIS. It is also the only aftermarket tach I've found that has an inductive spark plug pickup option! Very cool. Turns out I didn't need that because this thing picked up the signal from the microsquirt Tach output like a champ. I relocated the turn signal (green LEDs) and hi beam (amber LED) indicators to the gauge bezel. Also shot the gauge bezel with a fresh coat of enamel. (IMG:http://www.914world.com/bbs2/uploads_offsite/lh5.googleusercontent.com-11530-1330012301.1.JPG) Only remaining issues are my oil temp gauge and O2 sensor readings. I keep forgetting to post the .msq... Where are you getting the tack signal for your gauge? I can't find the output from the DB37 for a tack signal but they say that you can take it from the (-) pole of the coil packs and then run it through a converter to reduce the signal by half to use it with the stock gauge. |
rwilner |
Mar 6 2012, 03:02 PM
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#65
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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 |
Where are you getting the tack signal for your gauge? I can't find the output from the DB37 for a tack signal but they say that you can take it from the (-) pole of the coil packs and then run it through a converter to reduce the signal by half to use it with the stock gauge. The microsquirt has a 35 pin ampseal connector, not a DB37 connector. Perhaps you're using a megasquirt? Regardless -- I am driving the tachometer from pin 35 -- "tach output." Check out this wiring diagram. If you're running wasted spark like I am, you'll probably read twice actual the rpm if you connect the (-) coil to the stock tachometer. You'll have to build an interface circuit of some kind. If you're running sequential spark, you might get away with connecting one of the coil pack (-) wires to the stock tachometer. |
falconfp2001 |
Mar 6 2012, 06:28 PM
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#66
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Pancho Pantera Group: Members Posts: 451 Joined: 5-December 10 From: Downey, CA Member No.: 12,456 Region Association: Southwest Region |
Where are you getting the tack signal for your gauge? I can't find the output from the DB37 for a tack signal but they say that you can take it from the (-) pole of the coil packs and then run it through a converter to reduce the signal by half to use it with the stock gauge. The microsquirt has a 35 pin ampseal connector, not a DB37 connector. Perhaps you're using a megasquirt? Regardless -- I am driving the tachometer from pin 35 -- "tach output." Check out this wiring diagram. If you're running wasted spark like I am, you'll probably read twice actual the rpm if you connect the (-) coil to the stock tachometer. You'll have to build an interface circuit of some kind. If you're running sequential spark, you might get away with connecting one of the coil pack (-) wires to the stock tachometer. I found this online and it should work for the tach http://www.autosportlabs.com/tach-adapter-p-65.html |
rwilner |
Mar 28 2012, 08:06 AM
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#67
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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 |
A small update:
I have replaced the innovate O2 setup with an AEM analog unit (part number 30-5130). Here's why: The innovate O2 unit requires a connection to a single ground reference. This ground must be the engine block since the high-current sensor heater uses this ground. As stated previously, the microsquirt separates the sensor ground from the signal ground -- the O2 sensor input on the microsquirt is referencing the signal ground. IOW: The microsquirt O2 signal input references the signal ground. The Innovate O2 signal feed is tied to engine ground. To get the microsquirt to read O2, I'd have to tie the signal ground to the engine ground...not a good practice. Well, the *analog* AEM unit has an isolated signal ground for the feed to an engine management system. This is pretty much the only unit I found that has this feature...even the digital equivalent made by the same company doesn't have this feature! A few other things I discovered about microsquirt and tuning:
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falconfp2001 |
Apr 7 2012, 02:05 PM
Post
#68
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Pancho Pantera Group: Members Posts: 451 Joined: 5-December 10 From: Downey, CA Member No.: 12,456 Region Association: Southwest Region |
A small update: I have replaced the innovate O2 setup with an AEM analog unit (part number 30-5130). Here's why: The innovate O2 unit requires a connection to a single ground reference. This ground must be the engine block since the high-current sensor heater uses this ground. As stated previously, the microsquirt separates the sensor ground from the signal ground -- the O2 sensor input on the microsquirt is referencing the signal ground. IOW: The microsquirt O2 signal input references the signal ground. The Innovate O2 signal feed is tied to engine ground. To get the microsquirt to read O2, I'd have to tie the signal ground to the engine ground...not a good practice. Well, the *analog* AEM unit has an isolated signal ground for the feed to an engine management system. This is pretty much the only unit I found that has this feature...even the digital equivalent made by the same company doesn't have this feature! A few other things I discovered about microsquirt and tuning:
How is the AEM controller? I think gonna switch as this Innovate MTX is not what I expected. It takes a while to heat up but it won't display anything until after I've driven 2 to 5 minutes. I could sit in the driveway all day and it shows 22.4 all day. |
rwilner |
Apr 7 2012, 04:02 PM
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#69
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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 |
How is the AEM controller? I think gonna switch as this Innovate MTX is not what I expected. It takes a while to heat up but it won't display anything until after I've driven 2 to 5 minutes. I could sit in the driveway all day and it shows 22.4 all day. The AEM gauge / controller is working great for me. The gauge matches the MS reading, the system doesn't need calibration, and the sensor warms up in less than 30 seconds. I can recommend it. I believe the Innovate should warm up in a similar amount of time...if it doesn't there could be an issue with the sensor or wiring. |
rwilner |
Apr 10 2012, 07:01 AM
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#70
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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 |
Just a small update...
My car now revs to the redline! Before, the car would rev freely to 4k and bounce off of it like a rev limiter. Note that there is a software rev limiter in MS (which you can configure either as spark retard or fuel cut) but I had it disabled. I then read this thread on the microsquirt forums. In the V1 and V2 microsquirts, there was an issue with the VR circuit such that a diode had to be changed and a capacitor (c30) removed. I did both of these...desoldering surface mount components is a real PITA...but I got it done and now the car revs freely to the redline and BEYOND! Anyone that purchases a new microsquirt will not have this issue as the new circuit board layouts have these fixes. I'm now at the stage where I'm honing in on an optimal tune. In this recent thread I tuned my VE tables in response to AFR, but now that I can rev to redline, I can tune an area of the VE table that was previously inaccessible. Once I am 100% happy with the tune I will post the msq as I've been promising to do for what seems like months. |
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