Guys i was going to block my EGR and change around the vacuum line but i came across this posted by nissan.
"In designing the ZD30 engine, Nissan engineers increased the Exhaust Gas Recirculation (EGR) rate. This results in a gradual combustion process in which the mixture does not burn instantaneously following ignition, which keeps the combustion temperature from rising".
"Variable Swirl Mechanism
In the ZD30 engine, Nissan�s variable swirl mechanism consists of the tangential port, helical port and swirl control valve but in normal engine speed range, the swirl valve is closed and air is inducted only through the helical port � which works to generate powerful swirl for stable combustion.
At high engine speeds, the swirl control valve is opened and air is also taken in through the tangential port � increasing the intake air quantity in proportion to the larger amount of injected fuel to achieve thorough combustion characterized by little exhaust soot".
doesn't this mean that the engine was designed to work best with the egr active and the swirl valve closed and opened when needed. therefore we should not block the egr but instead just install a catch can and clean the intake periodically??
what do you guys think?
"In designing the ZD30 engine, Nissan engineers increased the Exhaust Gas Recirculation (EGR) rate. This results in a gradual combustion process in which the mixture does not burn instantaneously following ignition, which keeps the combustion temperature from rising".
"Variable Swirl Mechanism
In the ZD30 engine, Nissan�s variable swirl mechanism consists of the tangential port, helical port and swirl control valve but in normal engine speed range, the swirl valve is closed and air is inducted only through the helical port � which works to generate powerful swirl for stable combustion.
At high engine speeds, the swirl control valve is opened and air is also taken in through the tangential port � increasing the intake air quantity in proportion to the larger amount of injected fuel to achieve thorough combustion characterized by little exhaust soot".
doesn't this mean that the engine was designed to work best with the egr active and the swirl valve closed and opened when needed. therefore we should not block the egr but instead just install a catch can and clean the intake periodically??
what do you guys think?