Usually a product of valve overlap and exhaust. It's basically unburnt fuel coming through and igniting on the hot exhuast tip when it hits the air at the end of the exhaust pipe. In aspirated cars it's large valve overlap which helps scavenging and performance in the top end. Turbo cars, due to the large amounts of fuel at full noise. Normally happens after high RMP then throttle snapped shut.
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Could be blowin by piston rings and burning up and out the exhaust.. if that's the case... blackish smoke will come out exhaust when revved
the intake are next to the carb and the exhaust are next to the exhaust manafold intake are .008 exhaust are .012 with the engine warm good luck
Yes, a certain amount of water (not coolant) will drip out the tail pipe from the process of condensation.
Both are the same