Hi,
An interesting article, the best one I have so far! I have just upgraded to small 2860 -7 turbos and increased the boost to about 15 - 16 psi. Occasionally around 5000 rpm I get a misfire. It feels like ignition and occurs around maximum engine load.
I like the idea of your test jig! It looks like you are creating another ground reference with the aluminium sheet and increasing the gap between the spark plug thread until a spark jumps somewhere else. Do you have any photos of the setup, this would be handy!
A quick question on the injector plugs, do you just pull them off, or remove the spring first?
Cheers
Rob