Originally Posted by turbovanman
i looked over the SMEC conversion PDF and my 87 turbo wiring diagrams and my 89 minivan turbo wiring diagram and the 1987 Y5 wire from the PM that is black/light blue (like the sensors ground wiring color) does connect to the K5 splice but it connects through the J9 circuit splice and through 2 terminals of the fuel injector harness connector and the crimped connection of the fuel rail bolt ground lug. and the Y5 wire is only 18ga where all the other ground wires are 16ga. it could effect the operation of the K5 connection from the SMEC to the rest of the harness.
so for pin 2 of the SMEC 14 way connector that A.J. was connecting K5 circuit to the Y5 on the 85-87 PM connector, id run a separate 16 gauge wire over to the K5 circuit somewhere near the diagnostic connector.
is it crucial? dunno. i suppose i could do current tests through that ground to see how much it is carrying.
Brian
Originally Posted by turbovanman
Hmmm not sure.
Originally Posted by turbovanman
it looks like the switching is typically less than 10 ns, which would be more than adequate.
89 Voyager LE, 2.5T2 - rest in peace
87 Charger Shelby T2 (2.4 conversion in process)
Not happy on how crappy the car ran, A.J. torn out the LM/PM with SMEC conversion and put a 88 SMEC wiring in there instead. He said it runs so much better.
http://www.turbo-mopar.com/forums/sh...=1#post1110642
I've separated my body harness and engine harness to install Microsquirt, it is surprisingly easy to do.
I think LM/PM to SMES conversion will be more troublesome than just convert straight to SMEC harness.
It is a lot easier to do than most folks think.
I went from an 83 carbed harness to 89 SMEC. I basically did the same thing. Kept the body wiring, eliminated the engine wiring, then mated up what was left of the 83 harness to the engine wiring part of the 89 SMEC harness to make a working TII harness.
I did make a couple of changes to even out electrical load on the system, but after doing some electrical checks, it fired right up with no issues...
there are too many variables to know what was wrong with that setup. there was also LM/PM connectors on top of SMEC connectors which can add resistance in areas where resistance shouldnt be added.
gary donovan didnt complain when he did the same thing (without added connectors) to his reliant years ago....
Brian
Originally Posted by turbovanman
Right, old wires are not dependable. It would be a shame to did all the LM\PM to SMEC conversion work, then find out there are still issue.
I torn my 32 year old engine harness all out and put in Microsquirt and fresh harness, my ignition timing is dead on every time where I set it. No jumpy from 10 to 14 like every other stock turbo dodge I've seen.