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Puff Of Smoke On First Boost.

32SLOW

By 32SLOW,
in Engines & Forced Induction

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32SLOW Newbie

32SLOW

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Hey there everyone. R32 GTR on nistune with pretty much all bolt ons. 18-19psi and 310atw. Running GTSS and a cat on 98 pump. It was tuned a little rich to be on the safe side I guess. Noticing that on initial boost after warm up or cruising off full boost for a while that I'm puffing a blackish cloud out. Only once though. I realise it's the nature of the beast to smoke under poke. Just wondering what this initial boost cloud is all about. Built up fuel, carbon? Cat converter? Shit fuel??? Any suggestions or information would be greatly appreciated.

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GTSBoy Grand Master

GTSBoy

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Slightly too much fuel in the boost transition. Might just be the difference between the loads that the tuner was seeing on the dyno compared to the actual loads you get whilst on the road. You could do a log of a few boost transition runs and see which cells it's passing through and compare with where the tuner remembers it being (or run it on the dyno again to see if it's different). Could subtract a little fuel or just live with it as it is basically pretty safe.

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32SLOW Newbie

32SLOW

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The upgrade is just over 10k km's on now and has always left a bit of a stain on the ass being a white gtr. It's going in for a touch up tune next Saturday. Guess we can have a look at what's happening then. Once it's had a puff though there's no real smoke again. Unless stop start traffic for a while and cruising then just that initial boost. Has all new gear. Z32's, turbos, injectors, pump, controller, etc. Thanks for input guys. Just a paranoid 32 owner I guess...

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