We were tuning my car the other day at a local dyno shop. To keep a long story short. I had some white smoke comming out of the exhaust just after the dyno run finished. Right after he stopped acelerating a puff of whitish white smoke came out. I crapped my pants right there thinking it was the HG or a blown piston ring. To my surprise it stopped puffing white smoke after one or less than a minute of idle. We did more runs and all was cool, no more white or blue smoke, just black from the richness of the mixture. It only did it once. The mechanic said we might have had some detonation right at the end at around 6.9k RPM´s. Anyway, any thoughts or ideas to easy my mind or worry it are appreciated. Thanks


PS: The EGT's never climbed above 1500F at WOT and 17psi of boost. I had a slight peak of 12.8:1 on the wideband at around 5k RPM.

12.8 is too lean no matter what your egt's say, especially at 17psi of boost.

i run 11.4 on 19lbs of boost.

I know that. I am shooting towards 11.7 to 11.5 at WOT and full boost. I am getting the hang of it more or less, but I still need the help of a person that knows how to use the Emanage correctly. Either way, what do you think the smoke was?