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Old 12-18-2010, 09:44 AM   #1
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Default Gutting an ignitor and upgrading to BIP373

Has anyone does this yet? A friend's igniter died and we are looking to getting it back on track within the weekend, rather than finding a used igniter from a junkyard. No, he doesn't want to upgrade to COPS, and even if he did, we want to have the car ready before Monday (daily driver).
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Old 12-18-2010, 11:14 AM   #2
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Can't imagine why it wouldn't work. It's 5v triggered active-high, and has more than enough current capacity.

You'd need to jimmy something up if you wanted to keep the tachometer working in the instrument cluster, but that's about the only issue I see.
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Old 12-18-2010, 11:38 AM   #3
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A couple of diodes will solve the tacho problem, I was just looking for a quick solution to save my weekend Vs figuring it out from scratch (and the wife hating me for yet another project).
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Old 12-18-2010, 11:46 AM   #4
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It should work fine. It's probably even an upgrade from the 1.6 ignitor.
I sometimes ground the BIPs through a spare pin directly to the motor instead of through the ground plane inside the board. It makes me feel good, but it's not really necessary.
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Old 12-18-2010, 12:00 PM   #5
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I used two in a build once that utilized neon coils without ignitors...
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Old 12-18-2010, 01:44 PM   #6
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Any instructions?
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Old 12-18-2010, 01:52 PM   #7
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Quote:
Originally Posted by Reverant View Post
Any instructions?
1: Connect ignition trigger wires to BIP inputs.
2: Connect coil - wires to BIP load pins.
3: Connect BIP ground pins to ground.
4: ???
5: Profit.
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Old 12-18-2010, 01:56 PM   #8
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Nah that's too easy, it can't be for real.
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Old 12-19-2010, 07:33 AM   #9
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How'd you get on Reverant?

And do you have a circuit diagram for the tacho?
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Old 12-19-2010, 07:40 AM   #10
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I still haven't done it, as soon as I do and it's a success I'll let you know.
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Old 12-22-2010, 12:40 PM   #11
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What the igniter looks like inside. By the looks of it, I think it holds a grudge against me for using an HF-quality dremmel tool.


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Proceeding to gut it.
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Old 12-22-2010, 01:03 PM   #12
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Quote:
Originally Posted by Reverant View Post
Nah that's too easy, it can't be for real.
Remove R57. Jump R43.

Use a 270-330ohm resistor from the CPU (Squirt-1 or Accel-1) to IgbtIN.

Now just duplicate that BIP circuit for the second pair.
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Old 12-22-2010, 05:38 PM   #13
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Igniter gutted.

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Old 12-22-2010, 05:41 PM   #14
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And upgraded!

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Old 12-22-2010, 05:42 PM   #15
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that's some pretty lead heatsinking.
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Old 12-22-2010, 05:45 PM   #16
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Yup. The tab is also acting as the collector, so I chopped of the middle leg and that got me there faster and neater.
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Old 12-22-2010, 08:27 PM   #17
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Very clever.
Are the 2 diodes for tach pulse?
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Old 12-23-2010, 02:45 AM   #18
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Yes, here's to hoping that it will work.
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Old 12-23-2010, 05:23 AM   #19
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Awesome work Reverant, stealth upgrades!
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Old 12-23-2010, 07:13 AM   #20
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Partial success, it runs for a minute at first and then dies. The igniter gets hot, which suggests that the thermal protection kicks in. I'm using "Going low" for the spark output, this is an MSPNP9093 upgraded to MS-II. When using Going high (inverted), it doesn't want to run at all, I keep cranking for 4-5 seconds, it almosts catches for half a second, and then goes back to plain cranking.

The tacho doesn't work at all.
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