488 Light puffs of blue smoke on decel

I had the same issue when I replaced the exhaust system on a V Car. It could just be machining lubricants burning off the exhaust system. I'd give it a nice long drive to determine if the problem resolves itself.

 

Check the oil level and make sure it's not over filled.

Sometimes when you increase exhaust flow it can result in slightly higher vacuum levels; so you may need to add a little restriction on the fresh air breather side to balance things out. However, Ferrari uses a dry sump oil system, which is usually pretty effective.

I would start by checking you oil level.

Ray

 

Over-filling can sometimes cause this, but I would be more concerned with the turbos. The 488 turbos are well known for not liking higher than stock boost, and it could be a case of oil getting into the engine via the compressor or turbine shaft seals.
But obviously when you remove the cats, you will obviously get more smoke and smell. Reality is that with a tune anything is possible and those turbos were not designed for the higher boost.

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Yeah, oil seals and turbos.. never a dull moment.

I'm actually investigating (for a non-Ferrari turbo motor I'm building) using a turbo with a sealed center housing that uses grease as opposed to oil. It will either save a lot of headaches or introduce a whole new set...

Ray