triggering an msd
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Lead Driver
Joined: Mar 2008
Posts: 7,193
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From: Near Los Angeles
triggering an msd
In the photo/illustration below, with the bottom diagram, what is triggering the signal to the coil if not the ds2 magnetic trigger?
can anyone explain the advantages of using one over the other? Yes, i see that the one diagram uses a tfi coil, but other than that?
can anyone explain the advantages of using one over the other? Yes, i see that the one diagram uses a tfi coil, but other than that?
Post Fiend
Joined: Apr 2008
Posts: 5,338
Likes: 3
From: Grants Pass, Oregon
there are no "advantages", its two different applications..........Top pic shows the Duraspark connections, while the bottom is for the TFI system..........TFI is the newer system from later model years, if youve got a Dentside, it should have the DS............
Take a look at the diagrams closely,other than the MSD's heavy red and black wires to battery, nothing else looks or wires the same.........Look at your system, and use the connections that match your system. Ive used MSD boxes, i had an old Dodge that didnt seem to match the diagrams, i called there toll free tech support, the guy walked me through it in a matter of minutes.........
Take a look at the diagrams closely,other than the MSD's heavy red and black wires to battery, nothing else looks or wires the same.........Look at your system, and use the connections that match your system. Ive used MSD boxes, i had an old Dodge that didnt seem to match the diagrams, i called there toll free tech support, the guy walked me through it in a matter of minutes.........
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
The open-collector output of the TFI module is what triggers the MSD module. The existing TFI module "thinks" it's talking to the coil, when all it's doing is talking to the trigger input of the MSD module. There is no tangible advantage to either triggering mechanism.
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