redax saches ignition wiring

M

merlin

Senior member
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gunnislake cornwall
trying to fit the new redax charging ignition system has anyone fitted tec coils they have 2 connectors one blue one black ,does it matter which one is used for the feed from ignition 
dave
 
Strange in other posts it's been the other way around.
                                                                      Dave
 
There was some doubt over the wiring of the TEC coils so I checked out a couple of Honda wiring diagrams when going over the kit instructions with Red. They are all wired black +ve, green -ve.


      Keith
 
So from that assumedly the black +ve comes from the ignition switch ie to all three coils for power on and the 3 wires from the sacahe ignition for the coils ie 1,2  go to the green terminals on coils 1,2, on 120's replace that with 1,2,3.....

 
It probably makes very little difference which way you wire the coils. All it does is change the polarity of the spark. Although there is a preferred polarity (and I can't remember which way it is) it's only relevant for the centre cylinder on a 180 anyway. The plugs in the two outer cylinders will always be different polarity because the spark current goes in one plug and out the other.

Fussy 120 owners would undoubtedly spend hours sorting the polarity of all 3 plugs just because they can.

Cheers,
Cam
 
Dave,
I have sent you the instructions direct.
Any questions let me know.

Tchau
Red
 
Dellortoman said:
It probably makes very little difference which way you wire the coils. All it does is change the polarity of the spark. Although there is a preferred polarity (and I can't remember which way it is) it's only relevant for the centre cylinder on a 180 anyway. The plugs in the two outer cylinders will always be different polarity because the spark current goes in one plug and out the other.

Fussy 120 owners would undoubtedly spend hours sorting the polarity of all 3 plugs just because they can.

Cheers,
Cam
Click to expand...


Correct once more Cam,  referring to the "T" analogy of the tied primary secondary for TEK ignition coils like the single tower versions ( the dual tower are galvanic isolated ).  If you swap the primary connections scheme you either ground the bottom of the T or you run the secondary HT ionic current back through the ignition wiring and battery positive terminal,  battery internal  impedance to return or "earth".  Reversed primary polarity can put increased demands on electronic drive systems,  points it makes next to no difference at all.  Rare for me to consider it a serous problem,  though i try to make it correct as required,  not readily possible to work out how the T is formed with ignition coils,  unless special equipment is used,  that is not a multimeter.

  Hot electrode requires the negative electrode of the plug centre to be driven negative with respect to body,  there is a few KV strike voltage difference between "correct" plug polarity and reversed.  Plug Indexing is another technique with supporters and scoffers alike.  Red may have news on that from Drag racing days.

HTH John
 
John, I'm often astounded by your detailed knowledge on this subject.  :o

I'd be interested to hear peoples' opinions on plug indexing, and which orientation works best in a Laverda engine. I reckon Red's dyno may be just the piece of equipment to answer that question.

I've heard some pretty hair-brained explanations for indexing. I remember one bloke telling me the gap should face the inlet valve to better ignite the incoming mixture  :o

The only explanation I can come up with relates to flame propogation. When the compressed gas mixture is ignited, the flame front propogates in all directions, but there may be a brief flame "shadow" caused by the ground electrode of the plug. Maybe it's beneficial to have this shadow in a particular orientation. I suppose if the unburnt pocket of fuel in the flame shadow was to hit the hot exhaust valve it might ignite before the flame front gets to it and cause knocking. Seems a bit unlikely though. I'd be surprised if plug indexing actually achieves a measurable result but I'd be happy to be proven wrong.

Cheers,
Cam
 
One would have thought that if the low tension polarity did not matter that much then why does every coil manufactured I have certainly ever seen bother to put identification markings on the low tension terminals? I have read that wiring the coils incorrectly can cause overheating of the coil but I am unsure of the science behind the theory, or even whether or not it is just baloney  ;)


    Keith.
 
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