....I've forgotten, but aren't the oem plugs NGK?
they are for use with only the AXX engine - which is the early version.Why only this one I wonder... there was something about the AXX engine which made it the last of a specific type but I cant remember what it was now.
Talking of Spark Plug I was told by a VW Dealer the recommended interval is now 60K for the BYD engine in the ED30 when I asked for the cost for the 40K service while getting Mrs PG car done today. I won't be waiting that long, it really does seam VW are pushing the limits of the parts these days and I wonder if this is to help things like the cost of ownership comparisons ???
....Steve, I've been advised by several tuners and others whose opinions I respect, that it's good practice to change plugs every 20k miles on a tuned engine. It's not expensive and a wise precaution to help everything run sweet.
Like a few of you i would like to try and see what they do as "proof is in the pudding". Iain
Have a look at these mate. There have been some real good things being posted about them. Also have a look on the site with the demo on how the flame front moves http://www.pulstar.com/ignitionvelocity.htm
There is some real interesting stuff here. With these in place you could advance the timing quite a bit which would increase BHP and Torq.