Hi.
About the GK, my friend have it (180) on his Diablo2000 (of JR Models), and he told me that there is no difrenece between the GK and the silver (he have 180GK, 150,120, 91), and in a RC forum in Israel an other guy said that to. So what do you think that there is in the GK and there isn't in the silver? More RPM? Higher torque? Less engine cuts?
BTW in Israel it's very hot. I was in florida 3 or 2 years ago at july and it's really hot there and the dampness is very high, it's a kind of tropic climate. But in Israel it's hotter, in the summer the temps are 41C-49C and there are sometimes extremely changes that the temps are 50C plus. Anyway, remeber that the 4Star has no engine cowl so it can get cool air, but if in the future I'll use this engine (and I think I will) to a plane with cowling, you'r attitude (about that the engine runs cooler cause it's black) is good. I will see what are the price differences between the GK and the silver and then decide, cause I'm a bit short of price (I don't really know how to say that in Eng ). BTW, thats why I'll put at the start 46FX (its the engine I have on my trainer) and just then buy 72.

Anyway thanks! You halped me a lot! Elad.