question for turbodave:spark plugs
Turbo Mini Forums

can't say ive had any ngk failures- except 8/9ev on my kart a long time ago , normally use b7ecs for road turbo and b8ecs if its the ultimate - no 9's - ,used ev type ngk's but they dont seem to last as long , the recessed nose is supposed to be for competition engine or harder use according to the ngk book
have had champion fail out of the box but only standard type plugs ,havent used them for years now over ngk

When I first built my engine I had a problem with NGK's new out of the box.

But I had a problem with the return fuel line on the car though which caused the engine to flood on start up though!

But even when the plugs were dry they never worked again.

Don't know if they were faulty or if If the flooding killed them.