DuoWing Posted July 18, 2008 Share Posted July 18, 2008 Alright I've been doing some searching and I've seen people mentioning that you can eliminate the stock ignition module altogether and just run the Mallory/MSD ignition in it's place. I only really saw people mention it through the use of a 280ZX N/A. That some way you took the wires and ran them into the magnetic pickup of the ignition. Can this be done with the L28ETs Crank Angle Sensor? If so how do you wire this up? Eliminating the stock module would eliminate the wires that originally went to the positive and negative terminals on the coil wouldn't it? Also one thing I was wondering if I ran it by having the stock Ignition feeding my Mallory, should the stock ignition fail wouldn't that cause the Mallory to not run as well? By the way I'm running an 86' Z31 ECU/MAF combo. Quote Link to comment Share on other sites More sharing options...
Zmanco Posted July 19, 2008 Share Posted July 19, 2008 You can run the output of the 82-83 CAS to an MSD 6 box. The wiring to the MSD would be the same as if you used a NA distributor with its VR output. But, if you do that, what is going to control your timing? Basically you would adjust your initial advance by turning the distributor body and then locking it down, and it would never change. I don't think you want to do that. I'm not familiar with the 86' Z31 ECU/MAF combo so can't suggest how to put this all together. If you're going to go with an aftermarket controller, then you'd want to run the CAS into it, and let it control the MSD. That's what I did with Megasquirt. Edit: forgot to mention that you would have to supply power to the CAS. Here's a diagram I found on this site. I think credit should go to Mobythevan, but if I'm mistaken, my apologies to the original creator. It's not for what you described, but if you focus on the upper left you'll see how to wire the CAS. Quote Link to comment Share on other sites More sharing options...
DuoWing Posted July 19, 2008 Author Share Posted July 19, 2008 I didn't even think about the timing issue. You'd probably need the MSD box that would pull timing under boost. Alright well I'll just wire it up then with the signal coming from the original ignition. The Z31 Combo as far as I know wouldn't make much difference, it's just more advanced primarily in the fuel maps and the air metering. As far as the original ignition goes, should it die out I'm basically stuck then, correct? Or say if the stock ignition crapped out, would it be bypassed and the MSD still run correctly? I forget where I read it, but I believe someone said that you can even run a wire straight from the battery to the coil and bypass the ignition, almost as a way to test whether the ignition is on it's way out? Quote Link to comment Share on other sites More sharing options...
Zmanco Posted July 20, 2008 Share Posted July 20, 2008 If you use the stock ignition module to trigger the ECU or MSD and it fails, then yes, "you're stuck". But that's obvious. So did I misunderstand your question? Quote Link to comment Share on other sites More sharing options...
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