RE: Fuel? Glow plugs?
im new to this as well, im running blue thunder 20% and OS L-Series LC3 plugs not a clue if they are the best but they seem to be better than the OEM.
as far as suspension setup im pretty happy with my adjustments, they are:
Outside corner shock moved out 1 hole inner ones remain in stock location.
Castor shims moved from the front to the rear (decreased understeer) made it much easier to drift and rings donuts, not very good at full speed maneuvering but alot of fun at low speed.
removed the rear spring spacers and added the thickest ones they provide about 1/2 inch, this helped with the wheelie problem but it sounds like you dont have that issue mine was popping wheelies and rolling over on itself at half throttle, kinda annoying to me.
toed the rear in about 3 turns of the turnbuckle from stock settings decreased top speed a bit but helped launch and corners a little better.
toed the front out just a hair, no noticeable difference at all
TIP: remove the front skidplate and replace with aluminum its like 18 bucks and will help to prevent breaking the bulkheads, i already broke a set only 8 bucks to replace but takes a little time, so its well worth replacing