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Each coil has a high voltage plug wire and a 4-wire control set (12v to charge, 5v for dwell control, gnds for each.) They are best seen on coil #1, near top, plug wire to the left and control wires on the top right end.
Coils 1-3 have plug wires pointing left, with 4-6 pointing right. Three plug wires from 4-6 can bee seen headed to the right. Control wires for 4-6 are visible beyond the 1-3 plug wires. Coils on top row are 1-4-5, and on bottom 2-3-6. The ignition is true sequential. Uses 60-2 with hall sensor on the crank and a hall sensor in the distributor for phasing. Sequential gives lower amperage peaks on the 6 12v charging wires than wasted spark would give. |
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I may have to bend your ear a bit once I get to the ignition stage. |
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If I left one magnet out, would I have a missing tooth wheel? However - I notice that this doesn't seem to be very common. Embedded magnet wheels seem to be very rare. I guess the toothed wheel would be faster and cheaper to construct, but is there more to it? Does a toothed wheel have greater precision? Obviously I'm completely new to all of this... |
For example, I can get 50 of these tiny neodymium magnets from Amazon for $7.89:
http://forums.pelicanparts.com/uploa...1421179020.jpg They're 1/8" cylinders that are 1/8" long, but they're neodymium, so they should still be very, very strong. I'm really just looking for an effective and reliable way to do this - I certainly could just buy the Clewett setup or make my own version thereof. |
Sal,
what type or brand of MAF do you have? It's a very nice installation. André |
Andre,
The actual MAF is from PMAS (google them) but the solution is my own. I re-wrote the entire air fuel model in the motronic software to fully support a MAF. My solution does not make a MAF pretend it's a AFM. Trying to make a MAF mimic an AFM is a marginal solution, I spent 6+ years developing this solution. Quote:
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We have used magnets as triggers wheels on a number of builds we have done with Haltech ECUs. Typically we use four magnets on the crank pulley, three are spaced 120 degrees apart and have the north poles facing the sensor, one magnet is placed a few degrees before the magnet located at TDC, this magnet has the south pole facing the sensor. This tells the ECU to start the events.... Also Sometimes we use the distributor, or a cam angle sensor if the system is sequential... |
Wow. How do you have any accuracy control with ignition? Or are you doing fuel control only?
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Fuel+ Ign
It motivates this car quite well...... 840 hp and quite reliable http://forums.pelicanparts.com/uploa...1413842162.jpg |
Hmm, amazing.
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This is the one of the cars we built using Haltech... and a four magnet trigger...
Not bad <iframe width="420" height="315" src="//www.youtube.com/embed/uZnjfaNMJZA" frameborder="0" allowfullscreen></iframe> |
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http://forums.pelicanparts.com/uploa...1421265433.jpg http://forums.pelicanparts.com/uploa...1421265536.jpg http://forums.pelicanparts.com/uploa...1421265848.jpg http://forums.pelicanparts.com/uploa...1421265958.jpg Quote:
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I still don't see how the ignition has accuracy, but it works and that's all that matters.
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Sounds to me like I'm better off just getting a 36-1 toothed wheel and a good high-temp hall sensor. Any idea what Allegro sensor you used? |
Okay, progress is being made on the fueling front.
As I mentioned earlier, my LC-1 died on me. It kept throwing error after error and just simply would not work, even with a brand new Bosch sensor. So I did a bit of research and decided to replace it with an LC-2. The LC2 is significantly smaller that the LC1 and is a much simpler installation. No more external LED and calibration button, so only four wires - power, ground, and two analog outputs. The manufacturer recommends that the LC2 be installed in the passenger compartment, not in the engine compartment. It comes with a very long sensor adapter cable to make this possible. This actually turned out to be really annoying, because my wiring harness was all set up for the LC1 in the engine compartment. This meant tearing down the wiring harness in the cabin and snipping the 02 input wire so I could run it to the LC2. I also had to run a new switched power line into the cabin and run a ground line back to the engine. Frankly, I'm not sure that it was necessary to run the ground from the engine all the way into the cabin, but I wanted to keep the grounding consistent for everything. This may not have sounded like a big change, but it took the better part of a day to remove the LC1 wiring and to rewire the car for the LC2. I actually ended up adding a relay in the trunk for the LC2 because I didn't want to piggyback on some other accessory power source. I started her up and the LC2 was showing a pretty solid 19:1 a/f ratio, which seems awfully lean. I didn't have much time to investigate last night, but tonight I'll find out if it is reading correctly, etc. |
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19AFR is way lean at idle. These motors like to idle at 14.0-14.4 no leaner. |
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I used an Allegro ATS627LSGTN-T (DigiKey 620-1398-1-ND.) The picture posted earlier was showed it sitting in the 3/8" spacer bored to 8mm, before potting. As pictured, the sensor's leads had been bent 90 degrees, it was wrapped in special tape, and then in shrink wrap in preparation for being potted in epoxy. The sensor has two hall sensors and must be oriented properly (if backwards, it will read negative RPM as I recall.) Regarding grounding: common ground of all sensors at the MS is very important. If you ground elsewhere, you will introduce ground path errors that will throw off the sensor readings. Don't want to do that with the oxygen sensor. By the way, my engine is on the stand right now (body is at the painter's). I'm replacing the single LC-1 with dual 14.7Spartan controllers and sensors. Heed Sal's advice on cutting of the O2 harness. Double check your manufacturer info. |
As already pointed out, grounding of ALL things EFI is very important and the stock 3.2L Motronic's main ground point for all Sensors and the DME is on the ground screw located on intake runner for cyl #1. You can see all the brown wires grounded at that point if you look at my engine bay pic earlier in the thread. I suggest using that same factory ground location for any aftermarket EFI, I suspect Bosch and Porsche did the homework on that location.
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