Thanks Rocket-42. I have been running truggy today after a bit of an overhaul and the .21 5 Port is fine, grunty as ever
I think I might be running the wrong plug for the fuel I'm using or something though. I have blown 2 plugs in 6 tanks since I installed the turbo head (makes for expensive running !!). I am using 25% fuel, the same mix I have been running in all my engines for 18 months or more. Was running GS or Go #5 standard plug with no problems. Now using LRP #6 that I got with the turbo head button. Ambient temps at this time of year are 20 - 26 deg C. As I mentioned in previous post the standard head button was normal colour (it's been in there for 50 + tanks) and turbo button was black as after 5 tanks.

RETRO RC - what locally supplied plugs are you runing in your 7 Port Turbo ?