MSD BTM Help

[blubottlemax]

I was looking at JWT's instructions for wiring in an MSD ignition into the KA distributor, and I'm a little bit confused. I'm going to be using the MSD BTM only, is the wiring the same? Anyone using it want to explain the install a little better? Thanks in advance...

[pr240sx]

I was going to post the same questions but for a 93 DEWhere did you get yours?

[pr240sx]

Bumpy

[pr240sx]

Checking all around the forumsfor external coilfirst color is car wiring/MSD wireblack-red/REDgreen-black.whitecoil pos + /orangecoil neg - / black

As for internal s14 wiring, really dont knowWill check if for the BTM (the one I am installing) is the same.

[nissanfanatic]

When I installed mine on my S13, I did

red wire from BTM-tapped onto coil(+)white wire from BTM-coil(-) harnessorange wire from BTM-coil(-)black wire-ground

I'm positive this is correct by putting the "start psi" on 0 and turning the "boost retard" and watching the timing retard according to the knob. Worked for me.

[blubottlemax]

Thanks for the info. I just opened mine up today, but I haven't gotten a chance to check out the directions from MSD yet. The JWT directions list so many on the same sheet, its a little confusing. Gimme an engine, transmission, etc, and no problem, but damn I hate wiring... lol

[daniel240]

i installed mine over a year ago but i found these instructions i made laying around. heres what you do. on the smaller distributor plug (the one w/ only 2 wires coming out) there will be a light green wire w/ a black stripe, and a black wire w/ a red stripe. (hopefully yours is the same) you are going to cut the light green wire a few inched from the plug. take the part of the wire that is connected to the plug, and you connect the orange wire from the btm directly to that wire. the other peice of that wire (that goes back to the ecu) gets spliced into(T'd into) the white wire, that will be comming out of the distributor once you wire it. now the other wire coming out of the plug(blk w/ red stripe) is were you will splice (T) in the red wire from the btm. and you are done. it looks like a mess when your done. you dont do anything w/ the wires from the larger plug.

for the white wire, i dont remeber exactly what you do. it is the hardest part. you have to take off your distributor, and you break a connector inside the distributor and solder the white wire to one side of it and run the wire out of the distributor. I drilled a small hole in the distributor right by the rubber seal.

hope this helps

[sil80drifter]

I've JUST wired the BTM up (KA24-E)Two things seem odd:1) My tach stopped working, BUT my SAFC which previously did not show any rpm before 1200, now DOES. And it shows all the other rpm as well. Something weird about that tach signal. I don't think I'll get the adapter as the person in previous posts did, as I'd rather my SAFC show rpm than my tach.

2) The car sounds retarded. Literally, it seems that the BTM is retarding timing RIGHT away without having boost applied to it. That's odd and not quite kosher, but I guess I'll use my timing light and adjust the timing back to stock with the BTM on.

Does anyone else have similar experiences with the BTM? Suggestions, comments?

sil80