Posted by John T on October 29, 2009 at 14:42:37 from (66.244.97.31):
In Reply to: Pertronix Ignitor posted by Mark Warden on October 29, 2009 at 11:41:16:
Mark, good advice from Bob & Mel... As far as the plug wires, if you dont change the plug gap they are gonna fire at pretty much the same voltage as before so the old wires (IF in good shape) or 7 or 8 mm either would work fine.
What many people do when they add an elec switch to get the most bang for the buck is to match it up with a high energy higher voltage capacity coil and widen the plug gap. In that case you need good quality insulation wires so the higher operating voltages wont arc over somewhere buttttttttttt still even good quality stock wires or 7 or 8 mm EITHER will still work fine on your tractor. If you get into race cars and run say over a 0.050 plug gap and are at extreme high compressions thats when firing voltages can go wayyyyy up and you might need those 8 mm wires.
Id dont see any need to change the heat range of the plugs, thats a function of the reach and other factors having to do with heat dissipation which the elec ignition dont change much if any at all.....
As far as the gap if you use a stock coil I wouldnt change it much. If you wanna go with a high voltage coil you can widen the gap a bit more as it has the capacity to achieve higher firing voltages, but still even the stock coil can reach high enough to fire at a wider gap unless hou go crazy and open it realllllllll wideeeeeeeeee...
Id still match the switch with a high energy high voltage coil n run a wider gap that way you get the most bang for the buck that elec switch has to offer
BE SURE AND CHECK WITH PERTRONIX ABOUT THE NEED FOR ANY EXTERNAL BALLAST (does tractor have a ballast now or not) and get the polarity correct so you dont fry the new switch. The switch has a certain ampacity so the coil and/or coil and ballast combination cant be such that its exceeded.
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