Originally posted by Vegas Racer
Can someone tell me what the optimum operating temp is for the D3? I am running one in my Vision Pro and racing this weekend.
There are many variables that affect it; Ambient temp, fuel type and nitro content, altitude & barometric pressure, Pipe/manifold type and setting, clutch setting, glow-plug, gear ratio, available traction, How hard your driving, Etc. Etc.
All of the following conditions MUST be met before any temperature can be considered correct, assuming the engine is in good shape.
1.-There must be a visible trail of smoke when accelerating from EVERY corner.
2.-The idle is stable.
3.-The glow plug wire and surrounding bottom of plug dry, wire somewhat shiny, almost gray but the coil stays round (UN - DISTORTED) = Optimum power 100%
4.-The performance is good, and does not decrease along a tank of fuel.
Actually when a new plug wire just goes slightly gray after a 5 or 10 minute of hard run, it means you are very close to an optimal horsepower tune, but be careful the next step is TOO LEAN!
Note: You can only "Read" your plug in a nearly new state (Wire like new and shiny). A gray plug can still operate well. But after it has totally gone gray performance can start to fall off. To test just put in a new plug and if there is no difference in performance save the gray one or put it back in. If your engine does not feel or run right try a new plug before making major tune change's
If the optimum conditions are met according to above explanation, the Dragon D3R should read a Temp of around
100º - 120ºC, based on Air Temp of 25º - 28ºC at sea level.