The resistant of copper is 1,674 x10^-5 / meter.
Roy (or his son) sell this coils for 15$ http://www.cncengines.com/images/hvcoilsm.jpg
Why 4 chambers, the differens between the winds will be less into 4 chamber.
If you start left to wind and put 1000 winds in one row, you go back where you start with 1000 winds, and put 1000 Volt on this coil.
The differend between the first wind and teh last (2000) wind is 1000 Volt.
The isolation must be in this case at least 1mm between wind 1 and wind 2000 (if the wire wasn't isolate)
It's hard to explane if English isn't the first language.