TwinTurbo.NET: Nissan 300ZX forum - Smoking black from fuel. Also, there is no debate.
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Subject Smoking black from fuel. Also, there is no debate.
     
Posted by BobbyT on June 03, 2008 at 3:08 PM
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In Reply To is it smoking black from carbon or smoking blueish posted by gt300zxtt on June 03, 2008 at 01:32 PM
     
Message All cars run rich of stoichiometric (even "lean" ones...lean means "less rich"). Cats don't burn "already burnt oil fumes", they convert unburnt fuel (hydrocarbons) to carbon dioxide and water.

There is no "huge debate", or any debate at all, about backpressure on turbos. The same old wives' tale is also applied to NAs, and it's not true there either. An engine is an air pump. Exhaust is high pressure, it passes to low pressure. Anything that raises the pressure of the low pressure reservoir acts against flow. Ideally, you would connect your exhaust manifolds / headers / turbos to vacuum.

     
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