hey many thanks for this! however I'm a bit confused, your description says it's a vvt engine? I had the impression that egr is not necessary with a vvt engine, or maybe I'm wrong
Yes the QG16DE and QG18DE are both VVT engines. EGR valves just help the engine run cleaner by reburning exhaust gases. I did a lot of research on these engines with the idea of getting more power from them and found that the engine has VVT and works off oil pressure and engine speeds. A engine that has no modifications has a very flat power curve. If you get rid of all the restrictions IE: Air filter, and open up the exhaust you can feel the engine switch over at 3,500rpm and it really starts to sing at 4,000 all the way up to 6,500rpm and hit the rev limiter very easy. I don't have any mufflers just the cat and 1 3/4 inch pipe from cat-back. Nice exhaust note too.
I have a 2003 N16 Pulsar, not sure if it's different to the 2001 N16, but do you know if these have coolant jackets that run through the intake manifold ?
If the car has either the Nissan QG16DE or the QG18DE engine, you can just loop the coolant hose for the throttle body only. The later engine has a aluminium rocker cover where the early engines have a black plastic cover. The later engine has issues with blown headgaskets and stretched timing chains. My 2001 N16 has 1.6L QG16de engine with 440,000 km and still running great. Only done a water pump and sparkplug igniters as it's coil on plug design.
