I'm interested most in seeing the berus vs wellmans that are self regulated Z(the dual coilers i think). I prefer my push button and with the resistor in place its not as unsafe as it would be with straight 12v
I had some bosch last for over a year until they got overglowed by someone tryign to help me start the truck. Big mistake. I think the thing with bosch is that they are hot hot hot, i used 7 second glows to start whereas now i have to do more with the berus but I will see tomorrow if it starts even remotely decent with that time.
All eight died from being glown for way too long, I had another set in and they still work but i switched to berus because they dont seem to be as easy to burn out and i didn't wanna chance it after I read some bad reviews in the past I wouldn't be afraid to run more boschs. They didn't swell or burst or anything, they looked fine. I got lucky though the truck had some champions in it when I got it :X
the automated controller isn't calibrated to work with every glowplug made for the idi... And another common misconception is that the controller lowers voltage as the plugs get hot. The plugs do that themselves as they increase resistance, all the controller does is turn the relay to them on, let them get heated up, and turn relay off when IT thinks is necessary.