05-10-2015, 07:50 PM
Join Date: Sep 2011
Total Cats: 0
Sudden burst of white smoke?
N00b here, turbocharged the car, set up a conservative base map based on brain's timing and fuel. Planning to switch clutch and flywheel this week before doing hte 500mi break in and then take it to a dyno.
After installing turbo, drove around a lot while running autotune, then did a couple of hard pulls. Have mspnp set at 195kpa fuel cut. after about 10 pulls, got a big cloud of white smoke. drove home nursing the car, no smoke thereafter. I have a revlimiter coolant reroute and thought that maybe despite this that the car overheated and built up high coolant pressure and some escaped out the edge of a hose. Also suspected headgasket but the white smoke is not continuous.
Today, decided to start it back up to try to diagnose the issue and see if I had any white smoke upon idle. None. Drove about 20 minutes to lunch, taking it easy, ate for about a hour, started driving home and stopped at stop sign. When accelerating lightly from idle, got a sudden, singular burst of white smoke. Drove home thereafter, no more white smoke...
What could be happening?
I am thinking either:
1. fan maybe not kicking on, coolant too hot, pressure too high, a small amount burst out of piping, depressurized hte system, and instantly evaporated. (Tunerstudio shows max temp around 200)
2. Blown headgasket? Would it leak briefly like this?
Tune file attached... any chance it is too aggressive anywhere?
hard pulls pre-dyno bad idea.. .yes... but smile on face also yes...