This track in Bangkok are so much fun, around 25 sec a lap and it's semi-indoor. The D4 I am driving is using a pack of Track Power 3200mah Lipo, with a Speed Passion 5.5 and it can last a 8 minutes race no problem! This time I found some "Weight Plate" that make the Lipo as heavy as the Sub-C, so no need to stick alot of lead la! Hope brothers like it...
Not really, I was running a 7.5 before, until I got pass by another B4...
The gear ratio I am running is 78/19, for the original 81, you can use 18.
However, the 7.5 will be easier to drive thou, it actually feel smoother to control.