Originally Posted by
Nosram
Check and see if your piston and head is pitted, you might have been running with too much compression
pitted??....i was using 16% nitro with 0.35 head shims and P6 glowplug.
FYI top of piston and under the button head was already full of tiny black spots all over even b4 race day ( 2 days b4 the race i ran the engine without knowing the backplate screws were not tighten
the plug coil was missing when i unplug the glow
).......if u ask me why i still use this engine for d race...well i said to myself if i gonna blow up this motor might as well do it in the race
( actually was keeping my better engine for the next race)