There's a little more to learn about Kv's at differnt engine loads.
Adverage Kv at idle on most systems is 12 to 14 KV. Lower indicates low compression....small gap....low wire/plug resistence. fuel mixing, head design, and coil saturation along with switching cause other minor changes in rise time...duration...levels and collapse.

...http://www.findarticles.com/p/articles/mi_qa3828/is_200504/ai_n13632862

http://www.jacobselectronics.com/CatalogsList.aspx?BrandID=13

This last site supplied me with a VW system for my turbo engine in an air coled van......was impressed with the system.

I'm usng an Audi coil 'cose I got lot' of 'em.

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