vercingetorix Posted April 15, 2006 Share #1 Posted April 15, 2006 Does anyone know if the early z tachs were triggerd by a square wave or not?Regards,H Houghton Link to comment https://www.classiczcars.com/topic/19636-tach-wave/ Share on other sites More sharing options...
JZM Posted April 15, 2006 Share #2 Posted April 15, 2006 Early Z tach are current triggered / sign wave. like an alternator.Square wave is digatal.JZM.. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163633 Share on other sites More sharing options...
vercingetorix Posted April 15, 2006 Author Share #3 Posted April 15, 2006 So if I install an MSD 6A I would need a tach adapter?Best,H Houghton Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163635 Share on other sites More sharing options...
JZM Posted April 15, 2006 Share #4 Posted April 15, 2006 So if I install an MSD 6A I would need a tach adapter?Best,H HoughtonYES.JZM.. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163636 Share on other sites More sharing options...
vercingetorix Posted April 15, 2006 Author Share #5 Posted April 15, 2006 Thanks!H Houghton Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163637 Share on other sites More sharing options...
JZM Posted April 15, 2006 Share #6 Posted April 15, 2006 Thanks!H HoughtonAnytime.JZM.. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163638 Share on other sites More sharing options...
peng155 Posted April 15, 2006 Share #7 Posted April 15, 2006 I'm thinking about installing the MSD 6AL unit into my 71, I have the Pertronix ignition unit installed already, and I'm replacing the stock coil with the MSD Blaster 2 coil.As best as I can figure the wiring of the unit with the tach adaptor installed it should be wired like this...Parts...MSD 6AL unitMSD Tach adptor - PN 8920MSD Blaster 2 coil - PN 82026AL Unit.12v Power connection...Heavy Red - Pos. BatteryHeavy Blk - Neg. BatteryCoil connectionsOrange - Pos. CoilBlk. - Neg. CoilTriggerWhite - Blk. wire from PertronixRed - Blk/Wht 12v switch sourceTach Output - To Wht MSD Tach adaptor.Does this sound right??? Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163652 Share on other sites More sharing options...
JZM Posted April 15, 2006 Share #8 Posted April 15, 2006 Not to sure,I can't seem to remember the pertronix unit only having one wire. the units I have here all have two wire hook ups blk and a red or a purple and a green.all hook ups look good except the pertronix.pertronix w/ black wire-to the msd white wire and the red wire -to the small red on the msd.Not sure about the tach adapter I do not have a spec sheet/wiring diagram. JZM.. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163656 Share on other sites More sharing options...
240ZMan Posted April 15, 2006 Share #9 Posted April 15, 2006 I'm thinking about installing the MSD 6AL unit into my 71, I have the Pertronix ignition unit installed already, and I'm replacing the stock coil with the MSD Blaster 2 coil.I run pertronix with their flamethrower coil (1.5 ohms) with no issues. I had considered going with the MSD, but this route was much simpler. Once I had the pertronix installed, I just replaced the stock coil with the new one, and put a jumper across the resistor.IIRC, there wasn't much difference in the specs of the flamethrower and the msd blaster... just something to consider. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163661 Share on other sites More sharing options...
peng155 Posted April 16, 2006 Share #10 Posted April 16, 2006 Not to sure,I can't seem to remember the pertronix unit only having one wire. the units I have here all have two wire hook ups blk and a red or a purple and a green.all hook ups look good except the pertronix.pertronix w/ black wire-to the msd white wire and the red wire -to the small red on the msd.Not sure about the tach adapter I do not have a spec sheet/wiring diagram. JZM..Yeah you're right JZM.. there are actually 2 wires coming from the pertronix unit.. a red wire, and a black one.. The red wire went to one side of the ballast resistor, and the black wire went to the negative side of the coil... But with the MSD unit installed it looked like only the black wire connection was changed. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163677 Share on other sites More sharing options...
peng155 Posted April 16, 2006 Share #11 Posted April 16, 2006 I run pertronix with their flamethrower coil (1.5 ohms) with no issues. I had considered going with the MSD, but this route was much simpler. Once I had the pertronix installed, I just replaced the stock coil with the new one, and put a jumper across the resistor.IIRC, there wasn't much difference in the specs of the flamethrower and the msd blaster... just something to consider.Thanks for the info ZMan... I was wondering about the ballast resistor, did I still need it or could I remove it, or jumper it.. From the reading I've done the ballast resistor is needed if I was still running points... But since I'm not it looks like I can jumper it, or remove it.... Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163682 Share on other sites More sharing options...
240ZMan Posted April 16, 2006 Share #12 Posted April 16, 2006 Thanks for the info ZMan... I was wondering about the ballast resistor, did I still need it or could I remove it, or jumper it.. From the reading I've done the ballast resistor is needed if I was still running points... But since I'm not it looks like I can jumper it, or remove it....I think the pertronix has a minimum resistance it can handle, although I don't remember what that value is. Given its small size and that it's inside the dizzy without air circulation, I'm sure it can't handle as much current (in other words, as low of a coil resistance) as the external units like the MSD.I'd verify the resistance of the MSD coil and check with pertonix to be sure it can handle it. I suspect the pertronix might be damaged otherwise. Link to comment https://www.classiczcars.com/topic/19636-tach-wave/#findComment-163692 Share on other sites More sharing options...
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